CN211789240U - Connecting piece for PACK outside battery - Google Patents
Connecting piece for PACK outside battery Download PDFInfo
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- CN211789240U CN211789240U CN202020668711.7U CN202020668711U CN211789240U CN 211789240 U CN211789240 U CN 211789240U CN 202020668711 U CN202020668711 U CN 202020668711U CN 211789240 U CN211789240 U CN 211789240U
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- 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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Abstract
The utility model relates to the technical field of battery connection, and discloses a connecting sheet for a PACK outside a battery, which comprises a nickel-plated layer, a copper layer and a stainless steel layer which are sequentially arranged in a stacking manner from top to bottom; the copper layer and the stainless steel layer are combined in a surface compounding mode; the thickness ratio of the nickel-plated layer to the connecting sheet and the thickness ratio of the stainless steel layer to the connecting sheet are respectively 1-2% and 78-83%. The utility model provides a pair of connection piece for PACK outside battery, the stable performance, electric conductivity is good, and the internal resistance is low, and electric energy utilization is high, has good welding quality ability, intensity simultaneously, but the availability factor of full play battery.
Description
Technical Field
The utility model belongs to the technical field of the technique that the battery is connected and specifically relates to a connection piece for PACK outside battery.
Background
In order to electrically connect a plurality of lithium batteries to form a battery pack and facilitate management and control of a battery system and reasonable management of electric quantity, at present, manufacturers use connecting sheets made of nickel strips or mild steel SPCC surface nickel plating strips after punching, and the two ends of each connecting sheet are respectively welded with the lithium batteries, so that the plurality of lithium batteries are connected to form the battery pack.
However, the traditional lithium battery connecting material has a series of defects more or less, specifically, pure nickel has high cost, while the nickel plating belt on the surface of the excellent carbon steel SPCC has unstable performance, poor conductivity and high internal resistance, the internal electric quantity of the battery cannot be completely released, and the plating layer on the surface of the excellent carbon steel SPCC is easy to rust after falling off, so that the internal resistance safety of the product is reduced and the product is extremely unsafe.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a connection piece for PACK outside battery aims at solving and lacks the good and difficult problem of corroding rusty battery connection piece of electric conductive property among the prior art.
The utility model is realized in such a way that the connecting sheet for the PACK outside the battery comprises a nickel-plated layer, a copper layer and a stainless steel layer which are sequentially arranged in a stacking way from top to bottom; the copper layer and the stainless steel layer are combined in a surface compounding mode; the thickness ratio of the nickel-plated layer to the connecting sheet and the thickness ratio of the stainless steel layer to the connecting sheet are respectively 1-2% and 78-83%.
Further, the material of the stainless steel layer is 304 stainless steel.
Further, the thickness of the nickel plating layer is 0.003-0.006 mm.
Further, the thickness of the stainless steel layer is 0.234-0.249 mm.
Further, the hardness of the stainless steel layer is 140-160HV 0.2.
Further, the hardness of the copper layer is 70-80HV 0.2.
Compared with the prior art, the utility model provides a pair of connection piece for PACK outside battery, the stable performance, electric conductivity is good, and the internal resistance is low, and electric energy utilization is rateed highly, has good welding quality, intensity simultaneously, can give full play to the availability factor of battery.
Drawings
FIG. 1 is the utility model discloses the structural schematic of connection piece for PACK outside the battery that the embodiment provided.
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 and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
Referring to fig. 1, a preferred embodiment of the present invention is provided.
A connecting sheet for external PACK of a battery comprises a nickel-plated layer 11, a copper layer 12 and a stainless steel layer 13 which are sequentially stacked from top to bottom; the copper layer 12 and the stainless steel layer 13 are combined in a surface recombination mode; the thickness ratio of the nickel-plated layer 11 to the connecting sheet and the thickness ratio of the stainless steel layer 13 to the connecting sheet are respectively 1-2% and 78-83%.
The copper layer 12 and the stainless steel layer 13 are combined in a surface recombination manner, wherein the surface recombination means that different material layers are combined into a whole through certain mechanical occlusion by fully utilizing the principle of plastic deformation of metal and atomic diffusion between metals, and the process technology is a conventional process and is generally realized by a pressure compound machine.
The connecting sheet for the PACK outside the battery is stable in performance, good in conductivity, low in internal resistance, high in electric energy utilization rate, good in welding performance and strength and capable of giving full play to the service efficiency of the battery.
Preferably, the material of the stainless steel layer 13 is 304 stainless steel.
Preferably, the thickness of the nickel plating layer 11 is 0.003-0.006 mm.
Preferably, the thickness of the stainless steel layer 13 is 0.234 to 0.249 mm.
Preferably, the hardness of the stainless steel layer 13 is 140-160HV 0.2.
Preferably, the hardness of the copper layer 12 is 70-80HV 0.2.
Example 1
A connecting sheet for external PACK of a battery comprises a nickel-plated layer 11, a copper layer 12 and a stainless steel layer 13 which are sequentially stacked from top to bottom; the copper layer 12 and the stainless steel layer 13 are combined in a surface recombination mode; the thickness ratio of the nickel-plated layer 11 to the connecting sheet and the thickness ratio of the stainless steel layer 13 to the connecting sheet are respectively 1% and 82%.
The specific preparation process comprises the following steps:
s1, selecting raw materials: selecting a stainless steel strip with the thickness of 2.46mm and a pure copper strip with the thickness of 0.51mm, wherein the hardness of the stainless steel strip is 140HV0.2, and the hardness of the pure copper strip is 70HV 0.2.
S2, compounding: rolling and compounding the selected stainless steel belt and the selected pure copper belt, and simultaneously providing a certain heat energy for the stainless steel belt, controlling the temperature of the stainless steel belt at 750 ℃, and simultaneously providing a certain heat energy for the pure copper belt, controlling the temperature of the pure copper belt at 350 ℃, so that the stainless steel belt and the pure copper belt are compounded into a whole to obtain a composite belt material; the composite strip obtained after compounding is broken back and forth at 90 degrees, and the end face is not separated to serve as the qualified standard of compounding.
Specifically, in step S2, a stainless steel strip and a pure copper strip are rolled and compounded by a pressure compounding machine, and in order to ensure cleanliness between the selected pure nickel strip and the selected pure copper strip, an inert gas (N2) or an ammonia decomposition gas (N2, H2) is introduced into the pressure compounding machine to ensure a reduction environment when the stainless steel strip and the pure copper strip are rolled and compounded; thereby ensuring the cleanliness among materials and not generating substances with poor plasticity so as to influence the bonding strength of the materials.
S3, polishing treatment: and (3) carrying out surface polishing treatment on the composite strip to remove impurities generated on the surface of the composite strip in the compounding process.
Specifically, the composite strip integrated in step S2 is subjected to a surface polishing treatment in a polishing treatment machine to remove impurities generated on the surface of the composite strip during the compounding process, so as to eliminate surface defects (such as scratches, indentations, pits, etc.) of the product during the subsequent processing.
S4, first annealing treatment: and annealing the polished composite strip at 900 ℃.
In this embodiment, the annealing temperature range of the first annealing treatment is 850 ℃, and specifically, a suitable annealing temperature can be selected according to the difference of deformation in the compounding process; the main purpose of the annealing treatment is to make the crossed interface bonded more tightly through the diffusion of atoms between materials and strengthen the composite strength of the product.
S5, first rolling treatment: and (4) performing multiple rolling treatment on the composite strip subjected to the first annealing treatment by using a multi-roller rolling mill until the required thickness requirement is met.
S6, nickel plating layer: and plating a nickel layer on the copper surface of the annealed composite strip to obtain a finished strip.
The nickel layer has good conductive performance; preferably, the nickel layer has a thickness of 0.03 mm.
S7, second annealing treatment: and (4) annealing the finished strip, wherein the annealing temperature is 850 ℃.
S8, second rolling treatment: performing multiple rolling treatments on the finished strip subjected to the secondary annealing treatment by using a multi-roller rolling mill until the required thickness requirement is met;
s9, third annealing treatment: and carrying out third annealing treatment on the finished strip subjected to the rolling treatment, wherein the annealing temperature is 850 ℃.
Example 2
A connecting sheet for external PACK of a battery comprises a nickel-plated layer 11, a copper layer 12 and a stainless steel layer 13 which are sequentially stacked from top to bottom; the copper layer 12 and the stainless steel layer 13 are combined in a surface recombination mode; the thickness ratio of the nickel-plated layer 11 to the connecting sheet and the thickness ratio of the stainless steel layer 13 to the connecting sheet are respectively 2% and 83%.
The specific preparation process comprises the following steps:
s1, selecting raw materials: selecting a stainless steel strip with the thickness of 2.49mm and a pure copper strip with the thickness of 0.45mm, wherein the hardness of the stainless steel strip is 140HV0.2, and the hardness of the pure copper strip is 70HV 0.2.
S2, compounding: rolling and compounding the selected stainless steel belt and the selected pure copper belt, and simultaneously providing a certain heat energy for the stainless steel belt, controlling the temperature of the stainless steel belt at 750 ℃, and simultaneously providing a certain heat energy for the pure copper belt, controlling the temperature of the pure copper belt at 350 ℃, so that the stainless steel belt and the pure copper belt are compounded into a whole to obtain a composite belt material; the composite strip obtained after compounding is broken back and forth at 90 degrees, and the end face is not separated to serve as the qualified standard of compounding.
Specifically, in step S2, a stainless steel strip and a pure copper strip are rolled and compounded by a pressure compounding machine, and in order to ensure cleanliness between the selected pure nickel strip and the selected pure copper strip, an inert gas (N2) or an ammonia decomposition gas (N2, H2) is introduced into the pressure compounding machine to ensure a reduction environment when the stainless steel strip and the pure copper strip are rolled and compounded; thereby ensuring the cleanliness among materials and not generating substances with poor plasticity so as to influence the bonding strength of the materials.
S3, polishing treatment: and (3) carrying out surface polishing treatment on the composite strip to remove impurities generated on the surface of the composite strip in the compounding process.
Specifically, the composite strip integrated in step S2 is subjected to a surface polishing treatment in a polishing treatment machine to remove impurities generated on the surface of the composite strip during the compounding process, so as to eliminate surface defects (such as scratches, indentations, pits, etc.) of the product during the subsequent processing.
S4, first annealing treatment: and annealing the polished composite strip at 900 ℃.
In this embodiment, the annealing temperature range of the first annealing treatment is 850 ℃, and specifically, a suitable annealing temperature can be selected according to the difference of deformation in the compounding process; the main purpose of the annealing treatment is to make the crossed interface bonded more tightly through the diffusion of atoms between materials and strengthen the composite strength of the product.
S5, first rolling treatment: and (4) performing multiple rolling treatment on the composite strip subjected to the first annealing treatment by using a multi-roller rolling mill until the required thickness requirement is met.
S6, nickel plating layer: and plating a nickel layer on the copper surface of the annealed composite strip to obtain a finished strip.
The nickel layer has good conductive performance; preferably, the nickel layer has a thickness of 0.06 mm.
S7, second annealing treatment: and (4) annealing the finished strip, wherein the annealing temperature is 850 ℃.
S8, second rolling treatment: performing multiple rolling treatments on the finished strip subjected to the secondary annealing treatment by using a multi-roller rolling mill until the required thickness requirement is met;
s9, third annealing treatment: and carrying out third annealing treatment on the finished strip subjected to the rolling treatment, wherein the annealing temperature is 850 ℃.
Example 3
A connecting sheet for external PACK of a battery comprises a nickel-plated layer 11, a copper layer 12 and a stainless steel layer 13 which are sequentially stacked from top to bottom; the copper layer 12 and the stainless steel layer 13 are combined in a surface recombination mode; the thickness ratio of the nickel-plated layer 11 to the connecting sheet and the thickness ratio of the stainless steel layer 13 to the connecting sheet are respectively 2% and 78%.
The specific preparation process comprises the following steps:
s1, selecting raw materials: selecting a stainless steel strip with the thickness of 2.34mm and a pure copper strip with the thickness of 0.6mm, wherein the hardness of the stainless steel strip is 140HV0.2, and the hardness of the pure copper strip is 70HV 0.2.
S2, compounding: rolling and compounding the selected stainless steel belt and the selected pure copper belt, and simultaneously providing a certain heat energy for the stainless steel belt, controlling the temperature of the stainless steel belt at 750 ℃, and simultaneously providing a certain heat energy for the pure copper belt, controlling the temperature of the pure copper belt at 350 ℃, so that the stainless steel belt and the pure copper belt are compounded into a whole to obtain a composite belt material; the composite strip obtained after compounding is broken back and forth at 90 degrees, and the end face is not separated to serve as the qualified standard of compounding.
Specifically, in step S2, a stainless steel strip and a pure copper strip are rolled and compounded by a pressure compounding machine, and in order to ensure cleanliness between the selected pure nickel strip and the selected pure copper strip, an inert gas (N2) or an ammonia decomposition gas (N2, H2) is introduced into the pressure compounding machine to ensure a reduction environment when the stainless steel strip and the pure copper strip are rolled and compounded; thereby ensuring the cleanliness among materials and not generating substances with poor plasticity so as to influence the bonding strength of the materials.
S3, polishing treatment: and (3) carrying out surface polishing treatment on the composite strip to remove impurities generated on the surface of the composite strip in the compounding process.
Specifically, the composite strip integrated in step S2 is subjected to a surface polishing treatment in a polishing treatment machine to remove impurities generated on the surface of the composite strip during the compounding process, so as to eliminate surface defects (such as scratches, indentations, pits, etc.) of the product during the subsequent processing.
S4, first annealing treatment: and annealing the polished composite strip at 900 ℃.
In this embodiment, the annealing temperature range of the first annealing treatment is 850 ℃, and specifically, a suitable annealing temperature can be selected according to the difference of deformation in the compounding process; the main purpose of the annealing treatment is to make the crossed interface bonded more tightly through the diffusion of atoms between materials and strengthen the composite strength of the product.
S5, first rolling treatment: and (4) performing multiple rolling treatment on the composite strip subjected to the first annealing treatment by using a multi-roller rolling mill until the required thickness requirement is met.
S6, nickel plating layer: and plating a nickel layer on the copper surface of the annealed composite strip to obtain a finished strip.
The nickel layer has good conductive performance; preferably, the nickel layer has a thickness of 0.06 mm.
S7, second annealing treatment: and (4) annealing the finished strip, wherein the annealing temperature is 850 ℃.
S8, second rolling treatment: performing multiple rolling treatments on the finished strip subjected to the secondary annealing treatment by using a multi-roller rolling mill until the required thickness requirement is met;
s9, third annealing treatment: and carrying out third annealing treatment on the finished strip subjected to the rolling treatment, wherein the annealing temperature is 850 ℃.
The physical properties of the connecting pieces provided by the 3 examples are tested, and the test results are shown in the following table:
can know by last table, the embodiment of the utility model provides a pair of connection piece for PACK outside battery, the stable performance, electric conductivity is good, and the internal resistance is low, and electric energy utilization is rateed highly, has good welding performance, intensity simultaneously, can give full play to the availability factor of battery.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A connecting sheet for PACK outside a battery is characterized by comprising a nickel-plated layer, a copper layer and a stainless steel layer which are sequentially stacked from top to bottom; the copper layer and the stainless steel layer are combined in a surface compounding mode; the thickness ratio of the nickel-plated layer to the connecting sheet and the thickness ratio of the stainless steel layer to the connecting sheet are respectively 1-2% and 78-83%.
2. A tab for external PACK of claim 1, wherein the material of said stainless steel layer is 304 stainless steel.
3. A tab for external PACK of claim 1, wherein said nickel plating layer has a thickness of 0.003 to 0.006 mm.
4. A tab for external PACK of claim 1, wherein said stainless steel layer has a thickness of 0.234 to 0.249 mm.
5. The connecting sheet for external PACK of claim 1, wherein the hardness of said stainless steel layer is 140-160HV 0.2.
6. A tab for external PACK of claim 1, wherein said copper layer has a hardness of 70 to 80HV 0.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020668711.7U CN211789240U (en) | 2020-04-27 | 2020-04-27 | Connecting piece for PACK outside battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020668711.7U CN211789240U (en) | 2020-04-27 | 2020-04-27 | Connecting piece for PACK outside battery |
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| Publication Number | Publication Date |
|---|---|
| CN211789240U true CN211789240U (en) | 2020-10-27 |
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| CN202020668711.7U Active CN211789240U (en) | 2020-04-27 | 2020-04-27 | Connecting piece for PACK outside battery |
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| CN (1) | CN211789240U (en) |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 518000 workshop 103, No. 1, zhongjinling south, No. 2, Jinxiu Middle Road, Jinsha community, Kengzi street, Pingshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Zhongjin Lingnan Xinyue New Material Co.,Ltd. Address before: Room 203.204.205, Zhongjin Lingnan advanced materials factory office building, No.2 Jinxiu West Road, Pingshan District, Pingshan District, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN XINYUE NEW MATERIAL TECHNOLOGY CO.,LTD. |
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| CP03 | Change of name, title or address |