CN109638195B

CN109638195B - Shell with integral bending lap joint type frame

Info

Publication number: CN109638195B
Application number: CN201811588682.7A
Authority: CN
Inventors: 黄希光
Original assignee: Dongfeng Times Wuhan Battery System Co ltd
Current assignee: Dongfeng Times Wuhan Battery System Co ltd
Priority date: 2018-12-25
Filing date: 2018-12-25
Publication date: 2022-03-15
Anticipated expiration: 2038-12-25
Also published as: CN109638195A

Abstract

Casing with whole overlap joint formula frame of bending, at least as the shell of power battery package, its characterized in that: including casing down and install the integral casing of going up on this casing down, go up casing K and down sealing connection between the casing, wherein, the casing has down: the ring beam assembly is a closed ring formed by bending and connecting ring beam profiles; the bottom plate is clamped in the ring beam assembly; the supporting rod is used for connecting and fixing the bottom plate on the ring beam assembly, the cross section of the ring beam section is L-shaped, the vertical part of the ring beam section is a hollow frame part, the horizontal part of the ring beam section is a solid protruding part, the end part of the bottom plate is provided with a clamping groove clamped into the protruding part, the part of the supporting rod close to the two ends is connected and fixed with the ring beam section, and the middle part of the two ends is connected with the bottom plate. Therefore, the frame has the advantages of simple integral structure, easy processing, less working hours and low cost; simultaneously, bend through the section bar and then once connect fixed mode and obtain the ring beam subassembly, the roughness is high, and processing is easy.

Description

Shell with integral bending lap joint type frame

Technical Field

The invention relates to a shell of a battery pack of an electric automobile, belonging to the field of mechanical structures.

Background

A conventional battery pack for an electric vehicle generally includes an upper case and a lower case, and the lower case is required to have a certain mechanical strength because it carries a load of the weight of the battery pack and a plurality of battery modules and other circuit components in the case.

The existing lower case includes a frame beam and a bottom disposed in the frame beam, wherein the frame serves as a skeleton of the lower case, and the bottom plate serves as a support to fill the entire frame to seal the bottom of the battery pack.

One common design at present is to use four sections of rod members to be welded and spliced at the ends to obtain a quadrilateral frame, and then fixedly connect the whole or multiple pieces of plates to the frame.

However, the above structure has found the following disadvantages in practical use:

1. the plurality of welding parts cannot ensure the integral structural strength, and inevitably cause different connection strengths of four welding points;

2. the quadrangle obtained by welding cannot be completely on one plane, so that subsequent warping occurs and the quadrangle can be used only by subsequent shaping processing;

3. a plurality of welding parts, the processing cost is high, and the fixture that prevents to warp during the welding process is required to be designed according to different frame shapes, and frock clamp quantity is great, increases the processing cost.

Disclosure of Invention

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a housing having an integrally folded lap frame.

The invention provides a shell with an integral bending lap joint type frame, which is at least used as a shell of a power battery pack and is characterized in that:

comprises a lower shell and an integral upper shell arranged on the lower shell, wherein the upper shell K is connected with the lower shell in a sealing way,

wherein, lower casing has:

the ring beam assembly is a closed ring formed by bending and connecting ring beam profiles;

the bottom plate is clamped in the ring beam assembly; and

a support rod for connecting and fixing the bottom plate on the ring beam component,

the cross section of the ring beam section is L-shaped, the vertical part of the ring beam section is a hollow frame part, the horizontal part of the ring beam section is a solid protruding part,

the end part of the bottom plate is provided with a clamping groove clamped into the protruding part,

the parts of the supporting rods close to the two ends are fixedly connected with the ring beam section bar, and the middle parts of the two ends are connected with the bottom plate.

The shell with the integral bending lap joint type frame provided by the invention can also have the following characteristics:

wherein, the frame portion of the ring beam section bar is provided with at least one partition to divide the hollow frame into two square-shaped cavities.

wherein, the frame portion of ring beam section bar has two and cuts off and divide into three mouth word chambeies with this hollow frame: the first opening cavity, the second opening cavity and the third opening cavity which are sequentially reduced from top to bottom are formed, and the third opening cavity is connected with the protruding portion.

wherein the protruding part is in a convex shape,

the clamping groove arranged at the end part of the bottom plate and clamped into the protruding part completely clamps the small head part of the convex shape to abut against the small head part and is flush with the large head part.

the parts of the support rod close to the two ends are connected with the big end parts of the protruding parts through fasteners, and the middle parts of the two ends are connected with the bottom plate through fasteners.

wherein the bottom plate is formed by mutually splicing a plurality of groups of splicing plates,

the supporting rod is supported and fixed corresponding to the group of splicing plates.

wherein the splice plate is a hollow section bar plate, the cross section of the splice plate comprises a convex entity at one end, an ㄈ -shaped groove at the other end and at least one opening cavity,

the three parts are integrally connected to form a flat splice plate,

the convex entity at one end of the splicing plate is embedded into the ㄈ groove of the adjacent splicing plate, and the ㄈ groove at the other end of the splicing plate is embedded into the convex entity of the other splicing plate at the adjacent end, and the convex entity and the groove are repeatedly embedded to form the bottom plate.

the splicing plates are positioned on the bottom plate, contact with the ring beam assembly in the direction perpendicular to the stretching direction of the section bar of the hollow section bar plate and are clamped, and the number of the opening cavities at the two ends of each splicing plate is at least two, and the opening cavities are smaller than the opening cavities at the parts between the two ends.

wherein, collar tie beam subassembly, bottom plate and bracing piece are the aluminum alloy material, and the bracing piece is the aluminium alloy pole.

The shell with the integral bending lap joint type frame provided by the invention can also have the following characteristics that:

the mounting lug is fixedly connected on the outer side wall of the ring beam component,

the mounting lugs are cut from profile tubes of corresponding cross-section. .

Action and Effect of the invention

According to the shell of the integrally-bent lap joint type framework, the ring beam assembly made of the closed ring formed by bending and connecting the ring beam sectional materials is used as a framework, meanwhile, the quick installation and fixation are realized by clamping the bottom plate with the grooves at two ends with the protruding parts of the ring beam assembly, and the support rod is further arranged to support and strengthen the connection between the fixed bottom plate and the ring beam assembly, so that the framework has the advantages of simple integral structure, easy processing, less working hours and low cost; simultaneously, bend through the section bar and then once connect fixed mode and obtain the ring beam subassembly, the roughness is high, and processing is easy.

Drawings

Fig. 1 is a schematic structural view of a battery pack in an embodiment of the invention;

FIG. 2 is a schematic structural diagram of an integral lap-jointed frame according to an embodiment of the invention;

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

FIG. 4 is a cross-sectional schematic view of a ring beam profile

FIG. 5 is a schematic illustration of the splice connection of the ring beam profile and the bottom plate of the B-B outlined area of FIG. 3; and

FIG. 6 is a schematic view of the splice bar interconnection of the bottom panel of the C-C framed area of FIG. 3.

Detailed Description

In order to make the technical means, creation features, achievement purposes and effects of the invention easy to understand, the following embodiments specifically describe the family education management system of the invention with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a battery pack in an embodiment of the present invention.

Fig. 2 is a schematic structural view of an integral bending lap joint type frame in an embodiment of the invention.

Fig. 3 is a schematic sectional view along the line a-a in fig. 2.

Figure 4 is a cross-sectional schematic view of a ring beam profile.

Fig. 5 is a schematic illustration of the splice connection of the ring beam profile and the bottom plate of the B-B framed area of fig. 3.

Example 1

As shown in fig. 1, the case of the lap joint type frame, which is an outer case of the power battery pack, includes a lower case K and an upper case S mounted on the lower case.

The space between the upper shell and the lower shell is used for installing various parts L of the battery pack, the parts L comprise a battery protection module BDU, a standard part, a high-voltage copper bar, a manual maintenance switch MSD, a water cooling plate assembly, a battery module, an explosion-proof valve arranged on the battery module, a battery management system MBS and a low-voltage wire harness connected with the battery protection module BDU, the battery module and the battery management system MBS, and a sealing gasket is arranged between the upper shell K and the lower shell to compress and seal.

As shown in fig. 1, 2 and 3, the lower shell K is an integral bending lap joint type frame, which includes:

the ring beam assembly 10 is a closed ring formed by bending and connecting ring beam sectional materials.

And the bottom plate 20 is clamped in the ring beam assembly.

And the supporting rod 30 is used for connecting and fixing the bottom plate on the ring beam assembly.

As shown in fig. 3, the section of the ring beam is L-shaped, the vertical part of which is a hollow frame 11 and the horizontal part of which is a solid or hollow projection 12.

The end of the bottom plate is provided with a snap groove 21 for snapping into the protrusion.

Example 2

As an optimization, on the basis of example 1, in order to reinforce the strength of the ring beam profile while reducing the weight, the ring beam profile is designed to have at least two square-shaped structures: the frame part of the ring beam section bar is provided with at least one partition which divides the hollow frame into two square-shaped cavities.

Or further preferably, the frame part of the ring beam section bar is provided with two partitions to divide the hollow frame into three square-shaped cavities: from the cross section of the ring beam section shown in fig. 3, a first mouth cavity, a second mouth cavity and a third mouth cavity which are reduced in sequence are arranged from top to bottom,

the third port cavity is connected to the protrusion, and preferably, as shown in fig. 3, the third port cavity is integrally connected to the protrusion, and the height of the third port cavity is equal to the height of the protrusion.

Example 3

As a further optimization, on the basis of embodiment 1 or 2, as shown in fig. 3 and 4, the protruding portion is in a convex shape, and the end portion of the bottom plate is provided with a clamping groove for clamping into the protruding portion to completely clamp and abut against the small head portion of the convex shape and is flush with the large head portion.

Example 4

On the basis of embodiments 1 to 3, as shown in fig. 5, the portions of the support rod near both ends and the large end portions of the protruding portions are connected by the fastening members, and the middle portions of both ends and the bottom plate are connected by the fastening members. The fasteners are preferably screws.

Example 5

Alternatively, the base plate of the above embodiments 1-4 can be a one-piece flat plate, such as a metal aluminum plate, and this embodiment shows a base plate obtained by splicing sectional materials.

The bottom plate 20 is formed by splicing a plurality of splicing plates 22, and the supporting rod is supported and fixed corresponding to the splicing plates.

Preferably, the splice plate 22 is a hollow section plate, and the cross section thereof includes a convex solid 221 at one end, an ㄈ -shaped groove 222 at the other end, and at least one opening cavity 223, which are integrally connected to form a flat splice plate.

Specifically, as shown in fig. 5, the convex solid body at one end of the splice is embedded into the ㄈ -shaped groove of the adjacent splice, and the ㄈ -shaped groove at the other end of the splice is embedded into the convex solid body of the other splice adjacent to the end, and the bottom plate is formed by repeating the above steps.

Example 6

As shown in fig. 4 and 5, in addition to the above embodiment 5, in order to enhance the fastening connection strength between the bottom plate and the ring beam assembly, at least two opening cavities are provided in the splice plates (i.e. the left end in fig. 4 and the left end and the right end in fig. 2) at two ends (i.e. the left end and the right end in fig. 2) of the bottom plate, which are in contact with and fastened to the ring beam assembly in the direction perpendicular to the section stretching direction (i.e. the front-back direction in the drawing), and are smaller than the opening cavities at the portion between the two ends, so that the connection of the fastening portion can be enhanced by providing more dense opening cavities at the two ends of the splice plates of the connection portion, which is equivalent to reinforcement.

Example 7

On the basis of the embodiments 1 to 6, as an optimization, the ring beam assembly, the bottom plate and the supporting rod are all made of aluminum alloy materials, and the supporting rod is an aluminum profile rod.

Example 8

As shown in fig. 1, as an optimization, the integral bending lap joint type frame in the above embodiments 1 to 7 further includes a mounting ear 40 fixedly connected to the outer side wall of the ring beam assembly, and the mounting ear is cut from a section pipe with a corresponding cross section.

Effects and effects of the embodiments

According to the shell with the integrally-bent lap joint type framework, the ring beam assembly made of the closed ring formed by bending and connecting the ring beam sectional materials is used as a framework, meanwhile, the quick installation and fixation are realized by clamping the bottom plate with the grooves at two ends with the protruding parts of the ring beam assembly, and the support rod is further arranged to support and strengthen the connection between the fixed bottom plate and the ring beam assembly, so that the framework has the advantages of simple integral structure, easy processing, less working hours and low cost; simultaneously, bend through the section bar and then once connect fixed mode and obtain the ring beam subassembly, the roughness is high, and processing is easy.

Because the frame part of the ring beam section bar is provided with at least one partition to divide the hollow frame into two square-shaped cavities, the design with the square-shaped cavities can ensure the strength of the frame and reduce the weight; meanwhile, the mouth cavity can play a role in air heat insulation.

The frame portion of the ring beam section bar is provided with two partitions to divide the hollow frame into three square-shaped cavities: from the top down for first mouthful die cavity, second mouthful die cavity and the third mouthful die cavity that reduces in proper order, third mouthful die cavity is connected with the protruding portion, and the section bar of design like this has solid protruding portion owing to the lower part for the focus down, stability that can be better, and the total result makes the intensity of ring beam section bar higher, has stronger resistance to deformation ability.

Further, the protruding portion is the type of protruding, and the draw-in groove of card income protruding portion that the tip of bottom plate set up blocks the microcephaly part of this type completely and supports, and with major part parallel and level, such setting up makes the draw-in groove of bottom plate can be complete block the protruding portion, combines inseparabler, and the installation is fixed also more convenient.

Furthermore, because the splice plates are hollow section bars, the cross section of each splice plate comprises a convex entity positioned at one end, an ㄈ -shaped groove positioned at the other end and at least one opening cavity, the three parts are integrally connected to form a flat splice plate, the convex entity at one end of the splice plate is embedded into the ㄈ -shaped groove of the adjacent splice plate, and the ㄈ -shaped groove at the other end of the splice plate is embedded into the convex entity of the other splice plate adjacent to the other end of the splice plate, so that the splice plate is repeatedly buckled into a bottom plate, the size and the shape of the bottom plate can be conveniently combined by the structure, and the design is quick and convenient.

Furthermore, the two end splicing plates which are positioned on the bottom plate and are in contact with the ring beam assembly in the direction vertical to the section bar stretching direction of the hollow section bar plate have at least two opening cavities which are smaller than the opening cavities of the parts between the two ends, and the connection of the clamping parts is enhanced by the design, which is equivalent to reinforcement, so that the bottom plate obtained by splicing the plurality of splicing plates is firmer.

A splice plate for connecting has confined cavity, and this cavity is behind holding the air, when low temperature, can rely on the cavity to keep warm, when high temperature, relies on the section bar entity to carry out conduction heat dissipation, and such design makes the lower diapire of this container all design for sandwich structure, has foretell low temperature environment heat preservation and high temperature environment accelerates radiating effect.

And because the spliced section bar structure is adopted, the design and the manufacture can be rapidly carried out, the structure is simple, the design is easy, and the cost for mass manufacture is low.

The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.

Claims

1. The utility model provides a casing with wholly bend overlap joint formula frame, at least as the shell of power battery package which characterized in that:

wherein the lower case has:

the ring beam assembly is a closed ring formed by bending and connecting ring beam sectional materials;

the bottom plate is clamped in the ring beam assembly; and

the supporting rod is used for connecting and fixing the bottom plate on the ring beam component,

the end part of the bottom plate is provided with a clamping groove clamped in the protruding part,

the parts of the supporting rods close to the two ends are fixedly connected with the ring beam section bar, and the middle parts of the two ends are connected with the bottom plate;

the frame part of the ring beam section bar is provided with at least one partition which divides the hollow frame into two square-shaped cavities;

the supporting rod is supported and fixed corresponding to a group of splicing plates;

the three parts are integrally connected to form a flat splice plate,

the convex entity at one end of the splicing plate is embedded into the ㄈ -shaped groove of the adjacent splicing plate, and the ㄈ -shaped groove at the other end of the splicing plate is embedded into the convex entity of the other splicing plate adjacent to the end, and the bottom plate is formed by the repeated embedding;

the splicing plate is characterized in that the splicing plate is provided with at least two opening cavities at two ends, and the opening cavities are smaller than the part between the two ends of the splicing plate, wherein the splicing plate is positioned at the bottom plate and is in contact clamping with the ring beam component in the direction vertical to the stretching direction of the section bar of the hollow section bar plate.

2. The housing with integral lap joint frame of claim 1, wherein:

wherein, the frame portion of collar tie bar has two and cuts off and divide into three square shape chambeies with this hollow frame: a first opening cavity, a second opening cavity and a third opening cavity which are sequentially reduced from top to bottom,

the third port cavity is connected with the protruding part.

3. The housing with integral lap joint frame of claim 2, wherein:

wherein the protruding part is in a convex shape,

the end part of the bottom plate is provided with a clamping groove clamped into the protruding part, and the clamping groove completely clamps the small head part of the convex shape to abut against the small head part and is flush with the large head part.

4. The housing with integral lap joint frame of claim 3, wherein:

the parts of the supporting rod close to the two ends are connected with the big end parts of the protruding parts through fasteners, and the middle parts of the two ends are connected with the bottom plate through fasteners.

5. The housing with integral lap joint frame of claim 1, wherein:

the ring beam assembly, the bottom plate and the supporting rods are made of aluminum alloy materials, and the supporting rods are aluminum profile rods.

6. The shell with an integrally folded lap frame of claim 1, further comprising:

the mounting lugs are formed by cutting sectional tubes with corresponding cross sections.