CN211404582U - Electrode indirect welding type lithium battery pack - Google Patents
Electrode indirect welding type lithium battery pack Download PDFInfo
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- CN211404582U CN211404582U CN202020055477.0U CN202020055477U CN211404582U CN 211404582 U CN211404582 U CN 211404582U CN 202020055477 U CN202020055477 U CN 202020055477U CN 211404582 U CN211404582 U CN 211404582U
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- electrode
- lithium battery
- nickel alloy
- copper
- aluminum
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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 discloses an electrode indirect welding type lithium battery pack, which is formed by stacking and connecting more than two single lithium batteries in series; the single lithium battery comprises a lithium battery body, an aluminum electrode connected to the lithium battery body to serve as a positive electrode, and a copper electrode connected to the lithium battery body to serve as a negative electrode; a nickel alloy sheet or a nickel alloy strip is arranged between the aluminum electrode and the copper electrode of the adjacent single lithium battery, and the nickel alloy sheet or the nickel alloy strip is clamped between the aluminum electrode and the copper electrode and is welded together. The utility model discloses the structure is simplified, low in manufacturing cost, firm in connection between each monomer lithium cell copper aluminium electrode, can transship the heavy current, avoid simultaneously connecting the galvanic corrosion phenomenon that produces between lithium cell copper electrode and the lithium cell aluminium electrode, have less connection internal resistance.
Description
Technical Field
The utility model relates to a group battery, concretely relates to lithium cell group.
Background
With the development of battery technology, especially lithium ion batteries, battery packs composed of single lithium batteries are used as power supplies, both as power batteries and energy storage batteries, and have been widely used in the fields of electric vehicles, energy storage power stations, and the like. The anode of the single lithium battery is an aluminum sheet, and the cathode of the single lithium battery is a copper sheet. The single lithium batteries need to be connected in series to form a battery pack. The existing lithium battery pack is formed by stacking and connecting more than two single lithium batteries in series, and the aluminum electrode and the copper electrode of the adjacent single lithium batteries are connected with four modes: one is laser welding or ultrasonic welding, and because copper-aluminum electrode welding belongs to dissimilar metal welding, the welding is difficult, the internal resistance of the welding point of the laser welding or the ultrasonic welding is high, the aluminum is extremely fragile, the overload of large current is difficult, and the welding effect is poor; secondly, soldering is carried out after the nickel is converted from the aluminum electrode, high temperature as high as 350 ℃ can be generated during soldering, the soldering time lasts for more than 15s, and irreversible damage can be caused to the battery cell due to heat conduction; thirdly, a connection mode such as riveting is adopted, the problem of poor riveting exists, the internal resistance of the connection part is easy to be large, and the overload of large current is difficult to be caused; fourthly, aluminium electrode, copper electrode are equipped with aluminium connector, copper connector, aluminium electrode and aluminium connector welded connection, and copper electrode and copper connector welded connection are connected aluminium connector, copper connector again, and the main defect of this kind of mode lies in: the structure is complicated, the manufacturing cost is high, the internal resistance of the joint is large, and the overload large current is difficult to realize.
Disclosure of Invention
The utility model discloses to prior art's not enough, provide a structure simplification, low in manufacturing cost, firm in connection between each monomer lithium cell copper aluminium electrode, can transship the heavy current, avoid simultaneously connecting the galvanic corrosion phenomenon that produces, having less electrode indirect welding formula lithium cell group of connecting the internal resistance between lithium cell copper electrode and the lithium cell aluminium electrode.
The utility model discloses a technical goal is realized to following technical scheme.
The electrode indirect welding type lithium battery pack is formed by stacking and connecting more than two single lithium batteries in series; the single lithium battery comprises a lithium battery body, an aluminum electrode connected to the lithium battery body and used as a positive electrode, and a copper electrode used as a negative electrode; the aluminum electrodes and the copper electrodes of the adjacent single lithium batteries are welded; the improvement is that: and a nickel alloy sheet or a nickel alloy strip is arranged between the aluminum electrode and the copper electrode of the adjacent single lithium battery, and the nickel alloy sheet or the nickel alloy strip is clamped between the aluminum electrode and the copper electrode and is welded together.
The further improvement lies in that: the thickness of the nickel alloy sheet or the nickel alloy strip is 0.2-0.6 mm, and the nickel alloy sheet or the nickel alloy strip is composed of the following raw materials (in percentage by weight): 3E5% of Ni, 7-14% of Ge and 2-10% of MGF20.02-0.6% of V, 18-36% of Zn, and the balance of Al.
Compared with the prior art, the utility model, following positive effect has: be equipped with nickel alloy piece or nickel alloy strip between aluminum electrode, the copper electrode of adjacent monomer lithium cell, press from both sides nickel alloy piece or nickel alloy strip in the centre to welded connection is in the same place, and nickel alloy piece or nickel alloy strip form after melting can with copper electrode, aluminum electrode firm connection, and like this, the utility model discloses the structure is simplified, is showing and is reducing manufacturing cost, and aluminum electrode, copper electrode firm in connection, the heavy current that can transship of adjacent monomer lithium cell have avoided connecting the galvanic corrosion phenomenon that produces between lithium cell copper electrode, the aluminum electrode simultaneously, have less connection internal resistance.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
FIG. 2 is an enlarged view of part I of FIG. 1.
Fig. 3 is an enlarged schematic view of part ii of fig. 1.
Detailed Description
The invention will be further explained with reference to the following embodiments according to the attached drawings.
The electrode indirect welding type lithium battery pack shown in the attached figure is formed by stacking and connecting more than two single lithium batteries 1 in series; the single lithium battery 1 comprises a lithium battery body 1.1, an aluminum electrode 1.2 connected with the lithium battery body 1.1 as a positive electrode, and a copper electrode 1.3 as a negative electrode; a nickel alloy sheet or a nickel alloy strip 1.4 is arranged between the aluminum electrode 1.2 and the copper electrode 1.3 of the adjacent single lithium battery 1, the nickel alloy sheet or the nickel alloy strip 1.4 is clamped in the middle and is welded together, and a welding spot 1.5 is formed on the aluminum electrode 1.2 and the copper electrode 1.3; in the embodiment, the thickness of the nickel alloy sheet or the nickel alloy strip 1.4 is 0.2-0.6 mm, and the nickel alloy sheet or the nickel alloy strip is composed of the following raw materials in percentage by weight: 3-5% of Ni, 7-14% of Ge, 2-10% of MGF20.02-0.6% of V, 18-36% of Zn, and the balance of Al.
In this embodiment, the aluminum electrode 1.2 and the copper electrode 1.3 are parallel to the lithium battery body 1.1, and in other embodiments, the aluminum electrode 1.2 and the copper electrode 1.3 are perpendicular to the lithium battery body 1.1 or form an acute angle or an obtuse angle.
Claims (1)
1. An electrode indirect welding type lithium battery pack is formed by stacking and connecting more than two single lithium batteries (1) in series; the single lithium battery (1) comprises a lithium battery body (1.1), an aluminum electrode (1.2) connected to the lithium battery body (1.1) as a positive electrode, and a copper electrode (1.3) as a negative electrode; the aluminum electrode (1.2) and the copper electrode (1.3) of the adjacent single lithium battery (1) are connected in a welding way; the method is characterized in that: a nickel alloy sheet or a nickel alloy strip (1.4) is arranged between the aluminum electrode (1.2) and the copper electrode (1.3) of the adjacent single lithium battery (1), and the nickel alloy sheet or the nickel alloy strip (1.4) is clamped in the middle and is welded together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020055477.0U CN211404582U (en) | 2020-01-13 | 2020-01-13 | Electrode indirect welding type lithium battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020055477.0U CN211404582U (en) | 2020-01-13 | 2020-01-13 | Electrode indirect welding type lithium battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211404582U true CN211404582U (en) | 2020-09-01 |
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ID=72217675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020055477.0U Active CN211404582U (en) | 2020-01-13 | 2020-01-13 | Electrode indirect welding type lithium battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211404582U (en) |
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2020
- 2020-01-13 CN CN202020055477.0U patent/CN211404582U/en active Active
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