CN210326174U

CN210326174U - Continuous side composite copper-aluminum composite material

Info

Publication number: CN210326174U
Application number: CN201921126433.6U
Authority: CN
Inventors: 陈士荣; 吴显忠
Original assignee: Shanghai Yada Composite Metal Co Ltd
Current assignee: Shanghai Yada Composite Metal Co Ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-04-14
Anticipated expiration: 2029-07-18

Abstract

The utility model relates to a continuous side edge composite copper-aluminum composite material, belonging to the technical field of power transmission, which comprises a copper plate belt and an aluminum plate belt, wherein one side of the copper plate belt is joggled with one side of the aluminum plate belt to be made into a strip material; one side surface of the aluminum plate strip is provided with three aluminum mortises along the length direction, the aluminum mortises penetrate through two end surfaces of the aluminum plate strip, and the number of the aluminum mortises is three; one side of the copper plate strip is provided with three copper tenons matched with the aluminum mortises, and the three copper tenons are respectively arranged in one of the aluminum mortises. The utility model has large controllable range of embedding depth and three tenons, which makes the combining area have better flexibility and excellent anti-vibration performance, and can increase the area of the combining area of the copper-aluminum interface and improve the combining strength; the utility model discloses a compound copper aluminium combined material of side in succession can be punched into a large amount of copper aluminium with high efficiency and electrically conduct the row, and the quality is reliable, easily nondestructive test, and uniformity, stability, good reliability, a large amount of equipment investment and redundant personnel can be practiced thrift to the part machining enterprise.

Description

Continuous side composite copper-aluminum composite material

Technical Field

The utility model relates to a power transmission technical field especially relates to a compound copper aluminium combined material of continuous side.

Background

A large number of copper-aluminum busbars are connected in the power and battery pack industry. Copper-aluminum composites have been extensively studied and developed for their excellent properties.

At present, the conventional method for producing copper-aluminum composite materials in China is welding, namely, copper and aluminum parts are welded into copper-aluminum electric connection parts one by one, the production method needs to be provided with a large amount of personnel and equipment, the efficiency is low, the cost is high, a certain welding reject ratio is obtained, the welding combination area is limited, the product quality consistency, the stability and the reliability are difficult to fully ensure, and excessive weight is not needed.

Foreign countries have electrical connection parts manufactured by punching copper-aluminum continuous side composite coiled materials, but the copper-aluminum interface bonding area is small, the crack-resistant expansion capability is insufficient, the possibility of falling off exists, and the reliability is influenced; and the flexibility of the combination area is poor, and the anti-vibration performance is weak.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a compound copper aluminium combined material of continuous side, the area of multiplicable copper aluminium interface bonding region, bonding strength is high, the good reliability to can improve the pliability of bonding region, improve anti-seismic performance.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the continuous side edge composite copper-aluminum composite material comprises a copper plate strip and an aluminum plate strip, wherein one side of the copper plate strip and one side of the aluminum plate strip are joggled through three tenons to form a strip.

Furthermore, three aluminum mortises are formed in one side face of the aluminum plate strip along the length direction of the aluminum plate strip, the aluminum mortises penetrate through two end faces of the aluminum plate strip, and the aluminum mortises are arranged at intervals up and down; one side of the copper plate strip is provided with three copper tenons matched with the aluminum mortises, and the three copper tenons are respectively arranged in one of the aluminum mortises;

two aluminum tenons are formed between the three aluminum mortises, two copper mortises are formed between the three copper tenons, and the two aluminum tenons are respectively arranged in one of the copper mortises.

Furthermore, the two copper tenons at the top and the bottom are symmetrically arranged, and the upper surface of the copper tenon at the top is inclined downwards from the root to the head.

Further, the aluminum tenon is thickened at the head end, and the copper tenon groove is narrowed at the notch.

Further preferably, the aluminum tenon is gradually thickened from the root to the head end, and the copper mortise is gradually narrowed from the groove bottom to the notch.

Preferably, the depth of the aluminum mortise is 2.5mm to 25 mm.

Further preferably, the thickness of the copper plate strip is equal to that of the aluminum plate strip, and the thickness of the aluminum plate strip is 0.1mm-4 mm.

Preferably, the thickness of the uppermost copper tenon is 0.03mm-1.5 mm; the thickness of the middle copper tenon is 0.01mm-1 mm; the thickness of the lowest copper tenon is 0.03mm-1.5 mm.

The manufacturing method of the continuous side edge composite copper-aluminum composite material comprises the following steps,

step 1, manufacturing the copper plate strip and the aluminum plate strip;

step 2, extruding and compounding the two sides into a strip material continuously and vertically by a compound rolling mill at the same time at normal temperature;

and 3, continuously carrying out atomic diffusion heat treatment at 400-670 ℃.

Furthermore, the copper plate strip and the aluminum plate strip are processed by a machine or manufactured into corresponding section structures in a laminating mode.

Further, after the step 3, according to the specification and the size of the product, rolling by a finished product rolling mill → stress relief heat treatment → surface passivation → longitudinal shearing are sequentially carried out to obtain the finished product.

Compared with the prior art, the utility model discloses following beneficial effect has:

1, the utility model has large controllable range of embedding depth and three tenons, which makes the combining area have better flexibility and excellent anti-vibration performance; meanwhile, the area of a copper-aluminum interface bonding area can be increased, the area of the bonding area can be 8-15 times that of a welding method, the bonding strength is high, no redundant weight is generated, and the weight of the battery pack is reduced;

2, the tenon-and-mortise structure adopted in the utility model has good inhibition effect on the crack propagation and the loosening of copper and aluminum tenons which are possibly generated on the parts;

3, the embedding depth is large, the copper-aluminum electric contact surfaces are compact and gapless interatomic bonds, and the contact area is large, so that the internal resistance of copper-aluminum transition of the part is small, and the large-current overcurrent performance is better;

4, the copper-aluminum transition areas in the utility model are compact interatomic diffusion bonding, electrolyte liquid such as water vapor and the like can not permeate, and the corrosion resistance of parts is excellent;

5, use the utility model discloses the compound copper aluminium combined material of side direction that the method was made can the lapping packing, and the compound copper aluminium combined material of side direction of this lapping can be punched into a large amount of copper aluminium conducting bars with high efficiency, and the quality is reliable, easily nondestructive test, and uniformity, stability, good reliability, a large amount of equipment investment and redundant personnel can be practiced thrift to the part processing enterprise, and production degree of automation is high.

Drawings

FIG. 1 is a three-dimensional view of the first embodiment;

FIG. 2 is a three-dimensional view of a copper strip in accordance with one embodiment;

FIG. 3 is a schematic cross-sectional view of the first embodiment;

FIG. 4 is a schematic cross-sectional view of a copper strip according to one embodiment;

FIG. 5 is a schematic cross-sectional view of an aluminum strip in accordance with one embodiment;

FIG. 6 is a schematic illustration of two-sided extrusion;

FIG. 7 is a schematic extrusion view of a clad-rolling mill;

FIG. 8 is a schematic cross-sectional view of the second embodiment;

FIG. 9 is a schematic cross-sectional view of a copper strip according to a second embodiment;

in the figure: 1-copper plate strip, 2-aluminum plate strip, 11-copper tenon, 12-copper mortise, 21-aluminum tenon, 22-aluminum mortise and 23-guide cambered surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.

Example one

As shown in fig. 1 to 5, the lateral composite copper-aluminum composite material disclosed in this embodiment includes a copper plate strip 1 and an aluminum plate strip 2, and one side of the copper plate strip 1 and one side of the aluminum plate strip 2 are joggled by three tenons to form a strip. The three tenons are arranged in the embodiment, so that the area of a copper-aluminum interface bonding area can be multiplied, the bonding strength is improved, and the stability is improved.

In the embodiment, the aluminum mortises 22 are formed in one side face of the aluminum plate strip 2 along the length direction of the aluminum plate strip, the aluminum mortises 22 penetrate through two end faces of the aluminum plate strip 2, and the three aluminum mortises 22 are arranged at intervals from top to bottom; one side of the copper plate strip 1 is provided with three copper tenons 11 matched with the aluminum mortises 22, and the three copper tenons 11 are respectively arranged in one of the aluminum mortises 21. The length of the copper tenons 11 is of course equal to the length of the copper strips 1. Two aluminum tenons 21 are formed among the three aluminum mortises 22, two copper mortises 12 are formed among the three copper tenons 11, and the two aluminum tenons 21 are respectively arranged in one of the copper mortises 12. In another embodiment, the structure of the copper plate strip 1 and the aluminum plate strip 2 can be interchanged, namely, three aluminum tenons are arranged on one side of the aluminum plate strip at intervals from top to bottom.

For convenient assembly, the upper surface of the copper tenon 11 at the top inclines downwards from the root to the head, and the two copper tenons 11 at the top and the bottom are symmetrically arranged. The inclined plane makes two copper tenons 11 become thin from the root to the tip gradually, sets up three copper tenon 11 again simultaneously, makes the joining area pliability good, and anti-vibration performance is excellent. In order to facilitate the extrusion, the upper edge and the lower edge of the end part of the aluminum tenon 21 are rounded, and the rounded corners form a guide arc surface 23, so that the aluminum tenon 21 can be conveniently embedded between the two copper tenons 11.

The widths of the copper tenon 11 and the aluminum tenon 21 correspond to the embedding depth of the copper plate strip 1 and the aluminum plate strip 2. The copper plate belt 1 and the aluminum plate belt 2 are embedded into each other to a large depth, and the crack prevention expansion capability is strong. The depth of the embedded part is set according to the requirement, and the depth of the aluminum mortise 22 in the embodiment is 2.5mm-25 mm.

The thickness of the copper plate strip 1 is equal to that of the aluminum plate strip 2, and the upper surfaces of the copper plate strip and the aluminum plate strip are flush. Preferably, the aluminum strip 2 has a thickness of 0.1mm to 4 mm. The thickness of the copper tenon head 11 at the top is 0.03mm-1.5 mm; the thickness of the middle copper tenon 11 is 0.01mm-1 mm; the thickness of the lowest copper tenon 11 is 0.03mm-1.5 mm. The thickness of the aluminum tenon 21 is 0.03mm-1 mm.

The utility model discloses well copper aluminium interface bonding area is greater than the welding method, and bonding area can reach 8 ~ 15 times of welding method, and its bonding strength is high, does not have unnecessary weight, is favorable to the group battery to subtract heavy.

The controllable interval of embedding degree of depth is big, and divide into three from top to bottom, makes the joining area pliability better, and anti-vibration performance is excellent, and the tenon fourth of twelve earthly branches structure all has good inhibitory action to the crack propagation and the copper that the part probably produced, aluminium tongue not hard up simultaneously.

The embedded copper tongue is long, the copper-aluminum electric contact surfaces are compact and gapless interatomic bonds, and the contact area is large, so that the internal resistance of copper-aluminum transition of the part is small, and the heavy-current overcurrent performance is better.

The copper-aluminum transition region is dense interatomic diffusion bonding, electrolyte liquid such as water vapor and the like cannot permeate, and the corrosion resistance of the part is excellent.

The utility model discloses a production method of a lateral composite copper-aluminum composite material, which comprises the following steps:

step 1, manufacturing a copper plate strip 1 and an aluminum plate strip 2.

Taking a copper and aluminum plate strip blank with the thickness of 1-15 mm, machining or laminating by adopting a mechanical means, and machining or laminating to obtain a corresponding cross-sectional structure.

Step 2, as shown in fig. 6 and 7, extruding from both sides at normal temperature, and simultaneously continuously extruding and compounding the two sides into a strip by a compound rolling mill; the compression ratio of the compound rolling mill is 50-80%. Of course, the force of squeezing at both sides is less than the force of squeezing up and down.

And 3, carrying out atomic diffusion heat treatment in a continuous heat treatment furnace at the temperature of 400-670 ℃ to prepare a blank.

And 4, according to the specification and the size of the product, performing processing technologies such as conventional rolling technology rolling → cleaning → stress relief heat treatment → surface passivation → longitudinal shearing → packaging and the like to manufacture the product meeting the requirements of users. And the longitudinal shearing is used for cutting off redundant excess materials at the edge to obtain the strip materials with consistent width.

The lateral composite copper-aluminum composite material prepared by the method can be packaged in a roll. The coiled lateral composite copper-aluminum composite material can be efficiently punched into a large number of copper-aluminum conducting bars, has reliable quality, easy nondestructive detection, good consistency, stability and reliability, can save a large amount of equipment investment and redundant personnel for part processing enterprises, and has high production automation degree.

Example two

The difference between this embodiment and the first embodiment is: as shown in fig. 8 and 9, the aluminum tenon 21 is thickened at the head end and the copper mortise 12 is narrowed at the notch. Preferably, the aluminum tenon 21 is gradually thickened from the root to the head, and the copper mortise 12 is gradually narrowed from the groove bottom to the notch. The structure can effectively prevent the copper and aluminum tenons from loosening, inhibit the possible crack expansion and improve the reliability.

Of course, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and that such changes and modifications are intended to be included within the scope of the appended claims.

Claims

1. A continuous side edge composite copper-aluminum composite material is characterized in that: the aluminum strip is manufactured by joggling one side of the copper strip and one side of the aluminum strip through three tenons.

2. The continuous side clad copper aluminum composite material as claimed in claim 1, wherein: one side face of the aluminum plate strip is provided with three aluminum mortises along the length direction, the aluminum mortises penetrate through two end faces of the aluminum plate strip, and the number of the aluminum mortises is three; one side of the copper plate strip is provided with three copper tenons matched with the aluminum mortises, and the three copper tenons are respectively arranged in one of the aluminum mortises;

3. The continuous side clad copper aluminum composite material as claimed in claim 2, wherein: the two copper tenons at the top and the bottom are symmetrically arranged, and the upper surface of the copper tenon at the top is inclined downwards from the root to the head.

4. The continuous side clad copper aluminum composite material as claimed in claim 2 or 3, wherein: the aluminum tenon is thickened at the head end, and the copper tenon groove is narrowed at the notch.

5. The continuous side clad copper aluminum composite material as claimed in claim 4, wherein: the aluminum tenon is gradually thickened from the root to the head end, and the copper mortise is gradually narrowed from the bottom to the notch.

6. The continuous side clad copper aluminum composite material as claimed in claim 2, wherein: the depth of the aluminum mortise is 2.5mm-25 mm.

7. The continuous side composite copper-aluminum composite material as claimed in claim 2 or 6, wherein: the thickness of the copper plate strip is equal to that of the aluminum plate strip, and the thickness of the aluminum plate strip is 0.1mm-4 mm.

8. The continuous side clad copper aluminum composite material as claimed in claim 7, wherein: the thickness of the uppermost copper tenon is 0.03mm-1.5 mm; the thickness of the middle copper tenon is 0.01mm-1 mm; the thickness of the lowest copper tenon is 0.03mm-1.5 mm.