CN113889717A - Processing method of copper-aluminum composite pole - Google Patents
Processing method of copper-aluminum composite pole Download PDFInfo
- Publication number
- CN113889717A CN113889717A CN202111106046.8A CN202111106046A CN113889717A CN 113889717 A CN113889717 A CN 113889717A CN 202111106046 A CN202111106046 A CN 202111106046A CN 113889717 A CN113889717 A CN 113889717A
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- copper
- block
- aluminum
- sheet
- processing method
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- 239000002131 composite material Substances 0.000 title claims abstract description 74
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000003672 processing method Methods 0.000 title claims abstract description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 97
- 229910052802 copper Inorganic materials 0.000 claims abstract description 97
- 239000010949 copper Substances 0.000 claims abstract description 97
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 89
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 89
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000007731 hot pressing Methods 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 6
- 238000005219 brazing Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000011521 glass Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/564—Terminals characterised by their manufacturing process
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention relates to the technical field of processing of copper-aluminum composite poles, and discloses a processing method of a copper-aluminum composite pole, which comprises the following steps: s1, respectively processing a copper block and an aluminum block, wherein the thickness of the copper block is smaller than that of the aluminum block; s2, assembling the copper block and the aluminum block into a composite block by adopting one of hot pressing process, brazing and resistance welding; s3, processing the composite block into the copper-aluminum composite pole by adopting a cold heading process. The processing method of the copper-aluminum composite pole disclosed by the invention is formed by processing the copper block and the aluminum block, and the price of the aluminum block is far lower than that of the copper block, so that the total price of the copper block and the aluminum block is lower than that of the existing composite board, and the processing cost of the copper-aluminum composite pole is reduced.
Description
Technical Field
The invention relates to the technical field of processing of copper-aluminum composite poles, in particular to a processing method of a copper-aluminum composite pole.
Background
The negative pole post of power battery in the existing market usually adopts the combined plate stamping forming that copper and aluminium complex formed, and the volume of the aluminum product part of negative pole post usually accounts for more than half of total volume, and wherein, the price of aluminium is much lower than the price of copper, however, the price of combined plate is far higher than the price of copper for the processing cost of negative pole post increases by a wide margin.
Disclosure of Invention
Based on the above, the invention aims to provide the processing method of the copper-aluminum composite pole, which reduces the processing cost of the pole and improves the reliability of the pole.
In order to achieve the purpose, the invention adopts the following technical scheme:
a processing method of a copper-aluminum composite pole comprises the following steps:
s1, respectively processing a copper block and an aluminum block, wherein the thickness of the copper block is smaller than that of the aluminum block;
s2, assembling the copper block and the aluminum block into a composite block by adopting one of a hot pressing process, brazing and resistance welding;
and S3, processing the composite block into the copper-aluminum composite pole by adopting a cold heading process.
As a preferred scheme of the processing method of the copper-aluminum composite pole, when a hot pressing process is adopted in S2, the method comprises the following steps:
s21, stacking the aluminum block on the upper surface of the copper block, wherein the aluminum block and the copper block are arranged oppositely;
s22, placing the glass tube on a heating element for heating, and transferring heat from bottom to top;
s23, stopping heating when the upper surface of the copper block and the lower surface of the aluminum block begin to soften;
and S24, pressing the aluminum block downwards by using a pressure head, so that the aluminum block and the copper block form the composite block.
As a preferable scheme of the processing method of the copper-aluminum composite pole, in S23, when the temperature of the upper surface of the copper block reaches 500-650 ℃, the surface of the copper block and the aluminum block, which are in contact with each other, starts to soften.
As a preferable scheme of the processing method of the copper-aluminum composite pole, in S1, the surfaces of the copper block and the aluminum block are oxidized to form an oxide layer.
As a preferred scheme of the processing method of the copper-aluminum composite pole, the copper-aluminum composite pole comprises a copper sheet formed by the copper block and an aluminum sheet formed by the aluminum block, the aluminum sheet comprises a bottom sheet and a boss, the boss is positioned on the side of the bottom sheet deviating from the copper sheet, and the bottom sheet is overlapped with the copper sheet.
As a preferred scheme of the processing method of the copper-aluminum composite pole, the bottom sheet and the aluminum sheet are both wafers, the diameter of the bottom sheet is the same as that of the aluminum sheet, and the boss is a convex column, and the diameter of the convex column is smaller than that of the bottom sheet.
As a preferred scheme of the processing method of the copper-aluminum composite pole, the number of the bosses is at least two, and the diameters of the bosses are sequentially reduced along the direction of the central axis of the aluminum sheet deviating from the copper sheet.
As a preferred scheme of the processing method of the copper-aluminum composite pole, the boss is provided with a positioning groove, and the top end of the positioning groove is circumferentially provided with a chamfer.
As a preferred scheme of the processing method of the copper-aluminum composite pole, the base sheet and the copper sheet are rectangular sheets, the length and the width of the base sheet are respectively the same as those of the copper sheet, the cross section of the boss is rectangular, the length of the boss is smaller than that of the base sheet, and the width of the boss is smaller than that of the base sheet.
As a preferred scheme of the processing method of the copper-aluminum composite pole, the number of the bosses is at least two, and the length and the width of each boss are sequentially reduced along the direction departing from the copper sheet.
The invention has the beneficial effects that: the processing method of the copper-aluminum composite pole disclosed by the invention is formed by processing the copper block and the aluminum block, and the price of the aluminum block is far lower than that of the copper block, so that the total price of the copper block and the aluminum block is lower than that of the existing composite board, and the processing cost of the copper-aluminum composite pole is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described 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 according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a flowchart of a method for processing a copper-aluminum composite pole according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a composite block provided by an embodiment of the present invention;
fig. 3 is a schematic view of a copper-aluminum composite pole provided in the embodiment of the present invention;
fig. 4 is a cross-sectional view of a copper-aluminum composite post according to an embodiment of the present invention.
In the figure:
10. a copper block; 20. an aluminum block;
11. a copper sheet; 12. aluminum sheets; 121. a negative film; 122. a boss; 12201. positioning a groove; 12202. and (6) chamfering.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment provides a processing method of a copper-aluminum composite pole, as shown in fig. 1, including:
s1, respectively processing a copper block 10 and an aluminum block 20, wherein the thickness of the copper block 10 is smaller than that of the aluminum block 20;
s2, assembling the copper block 10 and the aluminum block 20 into a composite block by adopting one of hot pressing process, brazing and resistance welding, as shown in figure 2;
s3, processing the composite block into a copper-aluminum composite pole by adopting a cold heading process, as shown in figure 3.
The processing method of the copper-aluminum composite pole provided by the embodiment adopts the copper block 10 and the aluminum block 20 to process, because the price of the aluminum block 20 is far lower than that of the copper block 10, the total price of the copper block 10 and the aluminum block 20 is lower than that of the existing composite board, thereby the processing cost of the copper-aluminum composite pole is reduced, during processing, the copper block 10 and the aluminum block 20 are firstly assembled into a composite block, then the composite block is processed into the copper-aluminum composite pole, the processing technology can firmly connect the copper block 10 and the aluminum block 20 together, and the reliability of the copper-aluminum composite pole is improved.
In S1, the surfaces of the copper block 10 and the aluminum block 20 are oxidized, respectively, so that a dense oxide layer is formed on the surfaces, and the oxide layer can increase the connection strength between the copper block 10 and the aluminum block 20 in the composite block.
Specifically, when the copper block 10 and the aluminum block 20 are joined together by the hot pressing process in S2, the method includes:
s21, stacking the aluminum block 20 on the upper surface of the copper block 10, wherein the aluminum block and the copper block are arranged oppositely;
s22, placing the glass tube on a heating element for heating, and transferring heat from bottom to top;
s23, stopping heating when the upper surface of the copper block 10 and the lower surface of the aluminum block 20 begin to soften;
s24, pressing down the aluminum block 20 with a ram such that the aluminum block 20 and the copper block 10 form a composite block.
Note that, in S23, when the temperature of the upper surface of the copper block 10 reached between 500 ℃ and 650 ℃, the surfaces of the copper block 10 and the aluminum block 20 in contact with each other began to soften. During heating, heat is transferred to the aluminum block 20 through the copper block 10 by the heating element, so that the temperature of the copper block 10 is higher than that of the aluminum block 20, the melting temperature of the copper block 10 is 1083 ℃, the melting temperature of the aluminum block 20 is 660 ℃, when the temperature of the surfaces of the copper block 10 and the aluminum block 20, which are in contact with each other, reaches 500-650 ℃, the actual temperature in the copper block 10 is higher than the temperature value, the actual temperature in the aluminum block 20 is lower than the temperature value, so that the surfaces of the copper block 10 and the aluminum block 20, which are in contact with each other, can begin to soften, and the copper block 10 and the aluminum block 20 can be pressed together by means of external pressure, so that molecules of the copper block 10 and the aluminum block 20 are firmly combined together, and the two are firmly combined together. Compared with the existing bonding connection, the hot pressing process has better connection firmness, and compared with the existing welding rod welding process, the metallographic structure of the copper block 10 and the metallographic structure of the aluminum block 20 are not changed, the connection firmness of the copper block 10 and the aluminum block 20 is increased, and finally the reliability of the copper-aluminum composite pole is improved.
As shown in fig. 3 and 4, the copper-aluminum composite pole in S3 includes a copper sheet 11 formed by the copper block 10 and an aluminum sheet 12 formed by the aluminum block 20, the aluminum sheet 12 includes a base sheet 121 and a boss 122, the boss 122 is located on a side of the base sheet 121 facing away from the copper sheet 11, and the base sheet 121 overlaps the copper sheet 11. Specifically, the base sheet 121 and the aluminum sheet 12 of the present embodiment are both circular sheets, the diameter of the base sheet 121 is the same as the diameter of the aluminum sheet 12, and the boss 122 is a convex column and has a diameter smaller than the diameter of the base sheet 121. Further, the number of the bosses 122 is two, and the diameters of the bosses 122 are sequentially reduced along the direction of the central axis of the aluminum sheet 12 departing from the copper sheet 11. In other embodiments, the number of the bosses 122 can also be more than two, and the diameter of the bosses 122 is reduced along the direction of the central axis of the aluminum sheet 12 away from the copper sheet 11.
As shown in fig. 3 and 4, the positioning grooves 12201 are disposed on the bosses 122 of the present embodiment, and the positioning grooves 12201 are disposed on two bosses 122. As shown in fig. 3 and 4, the top end of the positioning groove 12201 is provided with a chamfer 12202 in the circumferential direction, and the chamfer 12202 is 45 °. The positioning groove 12201 and the chamfer 12202 are formed by stamping when the composite block is processed by adopting a cold heading process, the positioning groove 12201 enables the composite block not to move relative to a die used by the cold heading process in the processing process, the phenomenon that the composite block moves relative to the die to enable the copper-aluminum composite pole to become a defective product is avoided, and the yield of the copper-aluminum composite pole is increased.
It should be noted that, in other embodiments, the base sheet 121 and the copper sheet 11 may be both rectangular sheets, in order to save materials, the base sheet 121 is formed by processing a rectangular aluminum block 20, the copper sheet 11 is formed by processing a rectangular copper block 10, the length of the base sheet 121 is the same as the length of the copper sheet 11, the width of the base sheet 121 is the same as the width of the copper sheet 11, the cross section of the boss 122 is rectangular, the length of the boss 122 is smaller than the length of the base sheet 121, the width of the boss 122 is smaller than the width of the base sheet 121, specifically, the number of the bosses 122 is two or more than two, specifically, the length and the width of the bosses 122 are sequentially reduced along a direction away from the copper sheet 11 according to actual requirements. In other embodiments, the shapes of the base sheet 121, the copper sheet 11 and the boss 122 are not limited to the above limitations, and may be other shapes, and are specifically processed according to actual needs.
Specifically, the processing method of the copper-aluminum composite pole of the embodiment includes the following steps:
s1, respectively processing a disc-shaped copper block 10 and a disc-shaped aluminum block 20, and oxidizing the surfaces of the copper block 10 and the aluminum block 20 to form oxide layers, wherein the thickness of the copper block 10 is smaller than that of the aluminum block 20;
s21, stacking the aluminum block 20 on the upper surface of the copper block 10, wherein the aluminum block and the copper block are arranged oppositely;
s22, placing the glass tube on a heating element for heating, and transferring heat from bottom to top;
s23, stopping heating when the upper surface of the copper block 10 and the lower surface of the aluminum block 20 reach 500-650 ℃;
s24, pressing the aluminum block 20 downwards by using a pressure head to enable the aluminum block 20 and the copper block 10 to form a composite block;
s3, processing the composite block into the copper-aluminum composite pole by adopting a cold heading process.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A processing method of a copper-aluminum composite pole is characterized by comprising the following steps:
s1, respectively processing a copper block (10) and an aluminum block (20), wherein the thickness of the copper block (10) is smaller than that of the aluminum block (20);
s2, assembling the copper block (10) and the aluminum block (20) into a composite block by adopting one of hot pressing process, brazing and resistance welding;
and S3, processing the composite block into the copper-aluminum composite pole by adopting a cold heading process.
2. The processing method of the copper-aluminum composite pole according to claim 1, wherein when a hot pressing process is adopted in S2, the processing method comprises the following steps:
s21, stacking the aluminum block (20) on the upper surface of the copper block (10) and oppositely arranging the aluminum block and the copper block;
s22, placing the glass tube on a heating element for heating, and transferring heat from bottom to top;
s23, stopping heating when the upper surface of the copper block (10) and the lower surface of the aluminum block (20) begin to soften;
s24, pressing the aluminum block (20) downwards by using a pressure head, so that the aluminum block (20) and the copper block (10) form the composite block.
3. The processing method of the copper-aluminum composite pole according to claim 2, characterized in that in S23, when the temperature of the upper surface of the copper block (10) reaches 500-650 ℃, the surface of the copper block (10) and the aluminum block (20) contacting each other begins to soften.
4. The processing method of the copper-aluminum composite pole according to claim 1, characterized in that in S1, the surfaces of the copper block (10) and the aluminum block (20) are oxidized to form an oxide layer.
5. The processing method of the copper-aluminum composite pole according to claim 1, characterized in that the copper-aluminum composite pole comprises a copper sheet (11) formed by the copper block (10) and an aluminum sheet (12) formed by the aluminum block (20), the aluminum sheet (12) comprises a base sheet (121) and a boss (122), the boss (122) is located on the side of the base sheet (121) departing from the copper sheet (11), and the base sheet (121) is overlapped with the copper sheet (11).
6. The processing method of the copper-aluminum composite pole according to claim 5, wherein the bottom sheet (121) and the aluminum sheet (12) are both circular sheets, the diameter of the bottom sheet (121) is the same as that of the aluminum sheet (12), and the boss (122) is a convex column and the diameter of the convex column is smaller than that of the bottom sheet (121).
7. The processing method of the copper-aluminum composite pole according to claim 6, characterized in that the number of the bosses (122) is at least two, and the diameters of the bosses (122) are sequentially reduced along the direction of the central axis of the aluminum sheet (12) deviating from the copper sheet (11).
8. The processing method of the copper-aluminum composite pole according to claim 5, characterized in that a positioning groove (12201) is arranged on the boss (122), and a chamfer (12202) is arranged on the top end of the positioning groove (12201) in the circumferential direction.
9. The processing method of the copper-aluminum composite pole according to claim 5, characterized in that the base sheet (121) and the copper sheet (11) are rectangular sheets, the length and the width of the base sheet (121) are respectively the same as those of the copper sheet (11), the cross section of the boss (122) is rectangular, the length of the boss (122) is smaller than that of the base sheet (121), and the width of the boss (122) is smaller than that of the base sheet (121).
10. The processing method of the copper-aluminum composite pole according to claim 9, characterized in that the number of the bosses (122) is at least two, and the length and the width of the bosses (122) are sequentially reduced along the direction departing from the copper sheet (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111106046.8A CN113889717B (en) | 2021-09-22 | 2021-09-22 | Processing method of copper-aluminum composite pole |
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| CN202111106046.8A CN113889717B (en) | 2021-09-22 | 2021-09-22 | Processing method of copper-aluminum composite pole |
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| CN113889717B CN113889717B (en) | 2024-07-05 |
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| CN117937068A (en) * | 2024-03-21 | 2024-04-26 | 常州瑞德丰精密技术有限公司 | Composite pole block forming method |
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| Publication number | Publication date |
|---|---|
| CN113889717B (en) | 2024-07-05 |
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