CN106784562B - Electric connection assembly of lithium battery - Google Patents
Electric connection assembly of lithium battery Download PDFInfo
- Publication number
- CN106784562B CN106784562B CN201611144067.8A CN201611144067A CN106784562B CN 106784562 B CN106784562 B CN 106784562B CN 201611144067 A CN201611144067 A CN 201611144067A CN 106784562 B CN106784562 B CN 106784562B
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- Prior art keywords
- connecting piece
- lithium battery
- connection assembly
- electrical connection
- rod part
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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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside 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)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses an electric connection assembly of a lithium battery, which comprises a first connecting piece, a second connecting piece and a welding layer, wherein at least one connecting hole is formed in the first connecting piece, one end of the second connecting piece is inserted into the connecting hole and riveted with the first connecting piece, the second connecting piece is electrically connected with a battery cell pole of the lithium battery to be connected, the welding layer is arranged between the other end of the second connecting piece and the first connecting piece, and the first connecting piece is electrically connected with an output terminal of the lithium battery to be connected. The electric connection component of the lithium battery provided by the invention can meet the assembly requirement of the lithium battery, can ensure the over-current capability of the electric connection component and has high production yield.
Description
Technical Field
The invention relates to the technical field of lithium battery accessories, in particular to an electric connection assembly of a lithium battery.
Background
At present, in the new energy lithium battery industry, a plurality of lithium batteries are generally required to be connected in series and in parallel to form a module for use. The lithium battery pole is generally made of aluminum and aluminum (the positive and negative electrode materials are both aluminum); the inside electric core of lithium battery module generally adopts the aluminum sheet to connect when carrying out the series-parallel connection because aluminum sheet and electric core utmost point post are homogeneous material, easily welding. When the lithium battery module is packaged, a bolt lock is generally adopted to output the copper sheet when the module is connected with the module or the module is connected with an output port, and the overcurrent capacity of the aluminum sheet is limited because the module output electrode can collect larger current. And output copper sheet need with the welding of electric core aluminium utmost point post, the copper sheet is direct relatively poor with the aluminium utmost point post laser-welded manufacturability of electric core, generally all need set up the electric connection piece of copper aluminium switching, the copper sheet is used for the connection of modular assembly (insert soon or the jam bolt), the aluminum sheet is used for being connected (laser welding) with electric core utmost point post, consequently, the electric connection piece of module output utmost point needs to be copper aluminium switching. In the prior art, the copper-aluminum switching generally adopts torque ultrasonic welding, but the welded product is easy to have cracks, and the yield is low.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the electric connection assembly of the lithium battery can meet assembly requirements and is high in yield.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides an electric connection assembly of lithium cell, includes first connecting piece, second connecting piece and welding layer, set up at least one connecting hole on the first connecting piece, the one end of second connecting piece is inserted the connecting hole and is riveted with first connecting piece, and the second connecting piece is connected with the electric core utmost point post electricity of the lithium cell of treating to be connected, the other end of second connecting piece with be equipped with between the first connecting piece the welding layer, first connecting piece are connected with the output terminal electricity of the lithium cell of treating to be connected.
The invention has the beneficial effects that: the first connecting piece is electrically connected with an output terminal of the lithium battery, the second connecting piece is electrically connected with a cell pole of the lithium battery, the first connecting piece can be made of a material which is easily electrically connected with the output terminal of the lithium battery, the second connecting piece can be made of a material which is easily electrically connected with the cell pole of the lithium battery, and the assembling requirement of the lithium battery can be met through the arrangement; the second connecting piece is connected with the first connecting piece through riveting and welding layer, so that the overcurrent capacity of the electric connection assembly can be ensured, and the production yield is high.
Drawings
Fig. 1 is a plan view of an electrical connection assembly for a lithium battery according to an embodiment of the present invention;
FIG. 2 is a front view of an electrical connection assembly for a lithium battery in accordance with an embodiment of the present invention;
FIG. 3 is a side view of an electrical connection assembly for a lithium battery in accordance with an embodiment of the present invention;
fig. 4 is a front view of a second connecting member of the electrical connection assembly for a lithium battery according to an embodiment of the present invention.
Description of reference numerals:
1. a first connecting member; 11. connecting holes; 12. a first connecting piece; 13. a second connecting sheet; 14. a connecting portion; 2. a second connecting member; 21. a rod portion; 22. a head portion; 23. a protrusion; 24. a recessed portion.
Detailed Description
In order to explain technical contents, objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
The most key concept of the invention is as follows: the first connecting piece and the second connecting piece which are made of different materials are riveted and welded, so that the assembly requirement can be met, and the production yield is high.
Referring to fig. 1 to 4, an electrical connection assembly for a lithium battery includes a first connection member 1, a second connection member 2 and a welding layer, wherein the first connection member 1 is provided with at least one connection hole 11, one end of the second connection member 2 is inserted into the connection hole 11 and riveted with the first connection member 1, the second connection member 2 is electrically connected with a battery cell pole of the lithium battery to be connected, the welding layer is arranged between the other end of the second connection member 2 and the first connection member 1, and the first connection member 1 is electrically connected with an output terminal of the lithium battery to be connected.
From the above description, the beneficial effects of the present invention are: the first connecting piece is electrically connected with an output terminal of the lithium battery, the second connecting piece is electrically connected with a cell pole of the lithium battery, the first connecting piece can be made of a material which is easily electrically connected with the output terminal of the lithium battery, the second connecting piece can be made of a material which is easily electrically connected with the cell pole of the lithium battery, and the assembling requirement of the lithium battery can be met through the arrangement; the second connecting piece is connected with the first connecting piece through riveting and welding layer, so that the overcurrent capacity of the electric connection assembly can be ensured, and the production yield is high.
Further, the second connecting piece 2 comprises a rod portion 21 and a head portion 22, one end of the rod portion 21 is connected with the head portion 22, a protrusion 23 extending outwards along the radial direction of the rod portion 21 is arranged at one end, connected with the head portion 22, of the rod portion 21, the rod portion 21 is arranged in the connecting hole 11, the protrusion 23 is pressed into the first connecting piece 1, and the head portion 22 is welded with the first connecting piece 1.
Further, the protrusion 23 is saw-toothed, and the protrusion 23 is disposed around the stem 21.
Further, a concave portion 24 is arranged on the rod portion 21, and the concave portion 24 is arranged on one side of the protrusion 23 far away from the head portion 22 and close to the protrusion 23.
As can be seen from the above description, the serration and the depression on the second connecting member are riveting structures, and the riveting of the first connecting member and the second connecting member is realized through the serration and the depression.
Furthermore, the first connecting piece 1 comprises a first connecting piece 12 and a second connecting piece 13, the first connecting piece 12 is connected with the second connecting piece 13, the joint of the first connecting piece 12 and the second connecting piece 13 is of a stepped structure, and the second connecting piece 13 is provided with the connecting hole 11.
From the above description, the number of the openings, generally 1-5, of the second connecting pieces can be selected according to the serial and parallel requirements of the module, and the second connecting pieces with corresponding numbers can be matched.
Furthermore, the number of the second connecting sheets 13 is more than two, connecting portions 14 are respectively arranged between the more than two second connecting sheets 13, and the connecting portions 14 are of an arch structure.
According to the description, the connecting parts of the arch structures are arranged between the second connecting pieces, so that the height of the second connecting pieces can be conveniently adjusted, the first connecting pieces are conveniently connected with the lithium battery module, and the number of the arch structures is one less than that of the connecting holes.
Further, a surface of the first connection piece 12 is provided with a plating layer.
Furthermore, the material of the plating layer is gold, silver, nickel or tin.
As can be seen from the above description, the first connection piece is used for connecting with the output terminal of the lithium battery, and the surface of the first connection piece is provided with a plating layer, so that the conductivity of the first connection piece can be improved.
Further, the first connector 1 includes two or more copper foils, and the two or more copper foils are stacked.
As can be seen from the above description, the first connecting member can be formed by stacking a plurality of copper foils having a thickness of 0.1 to 0.5mm by molecular thermocompression diffusion bonding, or by direct stamping from a T2 copper plate.
Further, the first connecting piece 1 is made of red copper, and the second connecting piece 2 is made of aluminum alloy.
Known by the above description, the material of first connecting piece is copper, can conveniently carry out the electricity with output terminal and be connected, if insert structure or lock bolt soon, can not take place electrochemical corrosion with output terminal moreover, and the material of second connecting piece is aluminium, can conveniently weld with electric core utmost point post.
Referring to fig. 1 to 4, a first embodiment of the present invention is:
an electric connection component of a lithium battery comprises a first connecting piece 1, a second connecting piece 2 and a welding layer, wherein the first connecting piece 1 is made of copper, preferably T2 red copper, and the second connecting piece 2 is made of an aluminum alloy, such as 5005-H38 aluminum alloy, and has good conductivity and high strength. The first connecting piece 1 comprises a first connecting piece 12 and a second connecting piece 13, the first connecting piece 12 is connected with the second connecting piece 13, the connecting position of the first connecting piece 12 and the second connecting piece 13 is of a stepped structure, and a connecting hole 11 is formed in the second connecting piece 13. The surface of the first connection plate 12 is provided with a plating layer, and the material of the plating layer is gold, silver, nickel or tin. The first connection tab 12 is for electrical connection with an output terminal of a lithium battery. The number of the second connecting sheets 13 is more than two, connecting parts 14 are respectively arranged between the more than two second connecting sheets 13, and the connecting parts 14 are of arch structures. The first connecting piece 1 can be directly formed by punching T2 red copper, and can also be formed by a plurality of layers of T2 copper foils with the thickness of 0.1-0.5mm through molecular hot pressing diffusion welding.
The second connecting piece 2 is riveted in the connecting hole 11, and the second connecting piece 2 and the connecting hole 11 are coaxially arranged. The second connecting piece 2 comprises a rod portion 21 and a head portion 22, one end of the rod portion 21 is connected with the head portion 22, the other end of the rod portion 21 is inserted into the connecting hole 11 and is electrically connected with a battery cell pole of the lithium battery, one end, connected with the head portion 22, of the rod portion 21 is provided with a protrusion 23 extending outwards in the radial direction of the rod portion 21, the protrusion 23 is in a sawtooth shape, and the protrusion 23 is arranged around the rod portion 21. The stem 21 is provided with a recess 24, and the recess 24 is arranged on the side of the protrusion 23 far away from the head 22 and close to the protrusion 23. The rod part 21 is arranged in the connecting hole 11, the bulge 23 is pressed into the first connecting piece 1, the head part 22 is in a round cake shape, and a welding layer is arranged between the head part 22 and the first connecting piece 1 and is connected together through the welding layer by laser welding. The second connector 2 can be manufactured by machining or forging.
In conclusion, the electric connection assembly of the lithium battery provided by the invention can meet the assembly requirement of the lithium battery, can ensure the overcurrent capacity of the electric connection assembly and has high production yield.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention and the contents of the accompanying drawings, which are directly or indirectly applied to the related technical fields, are included in the scope of the present invention.
Claims (7)
1. The electric connection assembly of the lithium battery is characterized by comprising a first connecting piece, a second connecting piece and a welding layer, wherein the first connecting piece is provided with at least one connecting hole, one end of the second connecting piece is inserted into the connecting hole and riveted with the first connecting piece, the second connecting piece is electrically connected with a battery cell pole of the lithium battery to be connected, the welding layer is arranged between the other end of the second connecting piece and the first connecting piece, and the first connecting piece is electrically connected with an output terminal of the lithium battery to be connected;
the second connecting piece comprises a rod part and a head part, one end of the rod part is connected with the head part, a bulge extending outwards along the radial direction of the rod part is arranged at one end of the rod part connected with the head part, the rod part is arranged in the connecting hole, the bulge is pressed into the first connecting piece, and the head part is welded with the first connecting piece;
the protrusions are in a sawtooth shape and are arranged around the rod part;
the rod part is provided with a concave part, and the concave part is arranged on one side of the bulge, which is far away from the head part, and is close to the bulge.
2. The electrical connection assembly of a lithium battery as claimed in claim 1, wherein the first connecting member comprises a first connecting piece and a second connecting piece, the first connecting piece is connected with the second connecting piece, the joint of the first connecting piece and the second connecting piece is of a stepped structure, and the second connecting piece is provided with the connecting hole.
3. The electrical connection assembly of a lithium battery as claimed in claim 2, wherein the number of the second connecting pieces is two or more, and a connecting portion is provided between the two or more second connecting pieces, and the connecting portion has an arch structure.
4. The electrical connection assembly for a lithium battery as claimed in claim 2, wherein a surface of the first connection tab is provided with a plating layer.
5. The electrical connection assembly of a lithium battery as claimed in claim 4, wherein the plating layer is made of gold, silver, nickel or tin.
6. The electrical connection assembly of a lithium battery as claimed in claim 1, wherein the first connection member includes two or more copper foils, and the two or more copper foils are stacked.
7. The electrical connection assembly of a lithium battery as claimed in claim 1, wherein the first connection member is made of red copper, and the second connection member is made of an aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611144067.8A CN106784562B (en) | 2016-12-13 | 2016-12-13 | Electric connection assembly of lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611144067.8A CN106784562B (en) | 2016-12-13 | 2016-12-13 | Electric connection assembly of lithium battery |
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| Publication Number | Publication Date |
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| CN106784562A CN106784562A (en) | 2017-05-31 |
| CN106784562B true CN106784562B (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611144067.8A Active CN106784562B (en) | 2016-12-13 | 2016-12-13 | Electric connection assembly of lithium battery |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767184A (en) * | 2018-06-14 | 2018-11-06 | 湖南湖大艾盛汽车技术开发有限公司 | The connection structure in groups of efficient stable between a kind of power battery module |
| CN111326700A (en) * | 2019-12-26 | 2020-06-23 | 湖北锂诺新能源科技有限公司 | Electric connection structure between module electric cores |
| CN111490217A (en) * | 2020-04-10 | 2020-08-04 | 赤壁银轮工业换热器有限公司 | Copper bar assembly, battery module and copper bar assembly connecting method |
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