CN220178387U - Connecting sheet and welding device for welding sodium ion battery steel shell - Google Patents
Connecting sheet and welding device for welding sodium ion battery steel shell Download PDFInfo
- Publication number
- CN220178387U CN220178387U CN202321417636.7U CN202321417636U CN220178387U CN 220178387 U CN220178387 U CN 220178387U CN 202321417636 U CN202321417636 U CN 202321417636U CN 220178387 U CN220178387 U CN 220178387U
- Authority
- CN
- China
- Prior art keywords
- welding
- steel shell
- connecting sheet
- diameter
- ion battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000003466 welding Methods 0.000 title claims abstract description 73
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 39
- 239000010959 steel Substances 0.000 title claims abstract description 39
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910001415 sodium ion Inorganic materials 0.000 title claims abstract description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 22
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 9
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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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- Secondary Cells (AREA)
Abstract
The utility model belongs to the field of sodium ion battery preparation, and particularly relates to a connecting sheet and a welding device for welding a sodium ion battery steel shell. The utility model provides a welding device for welding a steel shell of a sodium ion battery, which comprises a welding needle and a disc base, wherein the diameter of the welding needle is 3-4 mm, and the diameter of the disc base is 6-46 mm. The connecting sheet comprises an aluminum layer and a nickel layer; the connecting sheet and the thickness are 0.1-0.15 mm, and the diameter is 6-46 mm. The welding device has simple structure and simple process, and can ensure that the steel shell and the connecting sheet are well welded by improving the size and the material placement position of the resistance welding equipment.
Description
Technical Field
The utility model belongs to the field of sodium ion battery preparation, and particularly relates to a connecting sheet and a welding device for welding a sodium ion battery steel shell.
Background
In the prior art, aluminum foil is often used as a negative electrode foil of a sodium ion battery cell, an aluminum-nickel composite belt is used as a tab, and a nickel layer of the tab and a nickel-plated steel shell are welded together in a resistance spot bottom welding mode. However, because the melting points of aluminum, nickel and steel are greatly different, an aluminum-nickel composite belt is adopted to weld with a nickel-plated steel shell, when the welding temperature is high, a nickel layer and the nickel-plated steel shell are well welded, and the aluminum layer is in a molten state and is easy to generate a phenomenon that metal liquid splashes in the battery cell, so that serious potential safety hazards exist. When the welding temperature is lower, the aluminum layer does not reach a molten state, but the nickel layer and the nickel-plated steel shell are in a cold joint state, so that the phenomena of high internal resistance of the battery core and high heat generation in the charge and discharge process are easily caused.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a connecting sheet and a welding device for welding a steel shell of a sodium ion battery, so that when a cylindrical sodium ion battery core is subjected to spot bottom welding by using an aluminum tab, the winding core can be prevented from being damaged by splashing of metal liquid, and the welding firmness of the tab can be ensured.
The aim of the utility model is realized by the following technical scheme:
the utility model provides a welding device for welding a steel shell of a sodium ion battery, which comprises a welding needle and a disc base, wherein the diameter of the welding needle is 3-4 mm, and the diameter of the disc base is 6-46 mm.
Preferably, the diameter of the disc is equal to or larger than the diameter of the welding needle by 2.
Preferably, the diameter of the disc base is 6-16 mm.
Preferably, the welding needle is arranged on the disc base, the steel shell and the connecting sheet are arranged between the welding needle and the disc base in use, the steel shell is arranged on the connecting sheet, the welding needle is tightly pressed with the disc base, and the welding of the steel shell and the connecting sheet can be realized by electrifying current.
The utility model also provides a connecting piece for welding the steel shell of the sodium ion battery, which is characterized by comprising an aluminum layer and a nickel layer; the connecting sheet and the thickness are 0.1-0.15 mm, and the diameter is 6-46 mm.
Preferably, the thickness ratio of the aluminum layer to the nickel layer of the connecting sheet is 1:2.
Preferably, the diameter of the connecting piece is 16mm.
The working principle of the utility model is as follows: the large current passes through the position with large contact resistance, generates a large amount of heat and enables the position to reach a molten state, and finally, the materials are welded together. Firstly, the disc base is contacted with the aluminum layer of the connecting sheet, and the contact resistance is small due to the large contact area; secondly, the welding needle enables the steel shell and the nickel of the connecting sheet to be laminated together, and the pressure is mainly concentrated at the position of the welding needle, so that the contact area of the steel shell and the nickel layer is small, and the contact resistance is large. When current flows through the welding needle, the steel shell, the connecting sheet and the disc base, the place with large contact resistance generates heat greatly (the steel shell and the nickel layer), and the place with small contact resistance generates heat little (the aluminum layer and the cylindrical base), so that differentiation is realized. The difference is increased by adjusting the sizes of the disc base and the welding needle, so that a state that the nickel layer reaches a molten state and the aluminum layer does not reach the molten state is obtained, and finally the connecting sheet and the steel shell are welded well. By using the same principle, the aluminum electrode lugs are welded on the aluminum layer of the connecting sheet, so that the steel shell and the aluminum electrode lugs can be firmly welded.
Compared with the prior art, the scheme of the utility model has the following advantages:
(1) The welding device has simple structure and simple process, and can ensure that the steel shell and the connecting sheet are well welded by improving the size and the material placement position of the resistance welding equipment.
(2) The welded steel shell can be spot-bottom welded with the negative electrode aluminum tab, and the phenomenon that the battery cell is damaged by metal splash is avoided, so that the process rate is improved.
(3) The cylindrical sodium ion battery cell can be produced by adding the resistance welding equipment on the basis of not changing the cylindrical lithium ion battery cell production equipment, and the production line has the lowest reconstruction cost.
Drawings
Fig. 1 is a position diagram of various materials and device accessories before welding, wherein 1 is a welding needle, 2 is a steel shell, 3 is a connecting sheet, and 4 is a disc base.
Fig. 2 is a position diagram of various materials and device accessories in the welding process, wherein 1 is a welding needle, 2 is a steel shell, 3 is a connecting sheet, and 4 is a disc base.
Detailed Description
The utility model provides a welding device which can firmly weld a cylindrical steel shell and a connecting sheet comprising an aluminum layer and a nickel layer together.
Fig. 1 and 2 show the placement positions of the various materials and device accessories of the present utility model before and during welding. The use of the welding device is described below in connection with fig. 1 and 2:
(1) The aluminum layer of the connecting sheet faces downwards and is placed on the center position of the disc base.
(2) The cylindrical steel shell is downwards sleeved on the disc base, the connecting sheet is pressed between the steel shell and the disc base, the nickel layer is attached to the steel shell, and the aluminum layer is attached to the disc base.
(3) And adjusting proper current and pressure, and spot-welding the bottom of the steel shell by using a welding pin to weld the steel shell and the connecting sheet together.
The connecting sheet used in the utility model is an aluminum-nickel composite wafer, the thickness of which is 0.1mm (the thickness ratio of the aluminum layer to the nickel layer is 1:2), and the diameter of which is 16mm.
The placing direction of the connecting sheet is as follows: the nickel layer was attached to the steel shell and the aluminum layer was attached to the disc base (the direction of placement was defined as "positive" and vice versa), as shown in table 1 below, with poor welding of the inverted tabs.
The effect of the pin diameter and disk diameter on the welding effect is shown in tables 2 and 3. The diameter of the welding needle for obtaining better welding effect is 3-4 mm, the diameter of the disc base is 6-46 mm (the diameter of the disc base is more than or equal to the diameter of the welding needle).
As shown in tables 4 and 5, after the proper welding pin diameter and disc diameter are selected, the welding current and welding pressure are changed within a reasonable range, so that the welding effect is not affected.
TABLE 1 influence of the connecting piece placement direction on the welding effect
TABLE 2 welding Effect at different disk diameters
TABLE 3 welding Effect at different pin diameters
TABLE 4 welding Effect at different welding currents
TABLE 5 welding Effect at different welding pressures
The above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be made in the equivalent manner, and the embodiments are included in the protection scope of the present utility model.
Claims (6)
1. The welding device for welding the steel shell of the sodium ion battery is characterized by comprising a welding needle and a disc base, wherein the welding needle is arranged on the disc base, the steel shell and a connecting sheet are arranged between the welding needle and the disc base when in use, the steel shell is arranged on the connecting sheet, and the welding needle and the disc base are tightly pressed and electrified, so that the steel shell and the connecting sheet can be welded; the diameter of the welding needle is 3-4 mm, and the diameter of the disc base is 6-46 mm.
2. The welding device of claim 1, wherein the diameter of the disc is.
3. The welding device of claim 1, wherein the diameter of the disc base is 6-16 mm.
4. A connecting sheet for welding a steel shell of a sodium ion battery, which is characterized by comprising an aluminum layer and a nickel layer; the connecting sheet and the thickness are 0.1-0.15 mm, and the diameter is 6-46 mm.
5. The connecting piece of claim 4, wherein the connecting piece has an aluminum layer to nickel layer thickness ratio of 1:2.
6. The connection pad of claim 4, wherein the connection pad has a diameter of 16mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321417636.7U CN220178387U (en) | 2023-06-05 | 2023-06-05 | Connecting sheet and welding device for welding sodium ion battery steel shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321417636.7U CN220178387U (en) | 2023-06-05 | 2023-06-05 | Connecting sheet and welding device for welding sodium ion battery steel shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220178387U true CN220178387U (en) | 2023-12-15 |
Family
ID=89114662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321417636.7U Active CN220178387U (en) | 2023-06-05 | 2023-06-05 | Connecting sheet and welding device for welding sodium ion battery steel shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220178387U (en) |
-
2023
- 2023-06-05 CN CN202321417636.7U patent/CN220178387U/en active Active
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