CN211743291U - Lithium ion battery's electric connection structure and lithium ion battery who has it - Google Patents
Lithium ion battery's electric connection structure and lithium ion battery who has it Download PDFInfo
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- CN211743291U CN211743291U CN202020586323.4U CN202020586323U CN211743291U CN 211743291 U CN211743291 U CN 211743291U CN 202020586323 U CN202020586323 U CN 202020586323U CN 211743291 U CN211743291 U CN 211743291U
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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
Abstract
The utility model provides a lithium ion battery's electric connection structure and lithium ion battery who has it, electric connection structure includes: a first metal sheet; the second metal sheet is attached to one side of the first metal sheet and is welded with the first metal sheet, the second metal sheet is welded to form a welding penetration area which is communicated along the thickness direction of the second metal sheet, the annular edge of the periphery of the welding penetration area forms an annular welding area, and the annular welding area is connected with the first metal sheet; and the bonding layer is at least arranged in the welding penetration area and is connected with the annular welding area and the first metal sheet so as to connect the first metal sheet and the second metal sheet. According to the utility model discloses lithium ion battery's electrical connection structure, through coating the adhesion layer in the butt fusion penetration zone after the welding process again, when guaranteeing effective electricity connection between first sheetmetal and the second sheetmetal, improve the connection mechanical strength between first sheetmetal and the second sheetmetal.
Description
Technical Field
The utility model belongs to the technical field of the battery material, more specifically relates to a lithium ion battery's electric connection structure and lithium ion battery who has this electric connection structure.
Background
The laser welding process is mainly realized by applying high-energy pulse laser, a pulse xenon lamp is generally adopted as a pumping source, and the welding process generally comprises the following steps: the pulse xenon lamp is lighted by the laser power supply, the xenon lamp is discharged by the laser power supply to form a light wave with a certain frequency, the light wave irradiates the laser crystal after passing through the laser light-gathering cavity, the crystal is stimulated to radiate, the pulse laser with the wavelength is emitted after passing through the resonant cavity, the pulse laser is expanded and reflected and focused on an object to be welded, and the working table is moved to complete welding under the control of the controller.
However, in the existing lithium battery material, due to the large melting point difference between the adopted materials, for example, in the laser welding process of iron-based materials such as carbon steel, stainless steel and the like and aluminum alloy materials, a low-melting-point metal sheet is melted during welding, the material is liquefied and flows and migrates due to the fact that the laser energy is far higher than the melting point of the metal, part of the material is lost in a melting region of the low-melting-point metal (the high-melting-point metal sheet is exposed), the loss of the welding material in the region causes the reduction of the connection strength, and the good electrical connection of the residual materials can be ensured, but the overall mechanical strength is reduced. Therefore, the key for solving the welding of the type is to improve the mechanical strength of the connection on the premise of ensuring the electrical connection performance of the welding, so that the practical application requirements can be met.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.
In view of this, the utility model provides a lithium ion battery's electric connection structure, this electric connection structure has that the solder joint fuses the advantage such as performance excellence, bonding strength height.
The utility model also provides a lithium ion battery, this lithium ion battery electricity connection performance is excellent.
According to the utility model discloses the electric connection structure of lithium ion battery of the embodiment of the first aspect, including the first metal sheet; the melting point of the second metal sheet is smaller than that of the first metal sheet, the difference value between the melting point of the second metal sheet and the melting point of the first metal sheet is larger than 500 ℃, the second metal sheet is attached to one side of the first metal sheet and is connected with the first metal sheet in a welding mode, a welding penetrating area penetrating along the thickness direction of the second metal sheet is formed by welding the second metal sheet, an annular welding area is formed on the annular edge of the periphery of the welding penetrating area, and the annular welding area is connected with the first metal sheet; and the bonding layer is at least arranged in the welding penetration area and is connected with the annular welding area and the first metal sheet so as to connect the first metal sheet and the second metal sheet.
According to the utility model discloses lithium ion battery's electrical connection structure adopts first sheetmetal 10, second sheetmetal 20 and adhesive linkage 30 combine together, at first weld the joining material through the welding and carry out welding treatment, guarantee the connection performance between the welding sheetmetal, meanwhile, this application technical scheme has the binder of good combining ability through coating and metal in the weld zone intra-area, when guaranteeing intensity between the welding base member, further improve the electrical connection performance between the welding base member material, thereby guarantee to have excellent electrical property and mechanical strength between the welding base member material.
According to the utility model discloses lithium ion battery's electric connection structure can also have following additional technical characterstic:
according to an embodiment of the present invention, the first metal sheet is iron and its alloy material, and the second metal sheet is aluminum and its alloy material.
According to an embodiment of the present invention, the first metal sheet is a carbon steel sheet or a stainless steel sheet.
According to the utility model discloses an embodiment, the second sheetmetal is in orthographic projection on the first sheetmetal is located in the first sheetmetal, every be equipped with at least one on the second sheetmetal annular weld zone, one weld zone of penetration and one the adhesive linkage.
According to the utility model discloses an embodiment, be equipped with a plurality ofly on the first sheetmetal the second sheetmetal, every be equipped with one on the second sheetmetal respectively annular weld zone, one weld zone of penetration and one the adhesive linkage.
According to an embodiment of the present invention, the annular welding zone is formed in a ring shape, a square ring shape, or a polygon shape.
According to an embodiment of the present invention, the thickness of the adhesive layer is less than 0.2 mm.
According to an embodiment of the invention, the adhesive layer covers the second metal sheet and at least a part of it protrudes out of the outer periphery of the second metal sheet.
According to the utility model discloses an embodiment, the second sheetmetal with first sheetmetal links to each other through laser welding, the adhesive linkage is epoxy layer or UV cured resin layer.
According to the lithium ion battery of the embodiment of the second aspect of the present invention, the lithium ion battery of any one of the above embodiments is electrically connected.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a top view of an electrical connection structure of a lithium ion battery according to an embodiment of the present invention;
fig. 2 is a top view of an electrical connection structure of a lithium ion battery according to another embodiment of the present invention;
fig. 3 is a top view of an electrical connection structure of a lithium ion battery according to yet another embodiment of the present invention;
fig. 4 is a top view of an electrical connection structure of a lithium ion battery according to yet another embodiment of the present invention;
fig. 5 is a top view of an electrical connection structure of a lithium ion battery according to another embodiment of the present invention.
Reference numerals:
an electrical connection structure 100 for a lithium ion battery;
a first metal sheet 10;
a second metal sheet 20; an annular weld zone 21; a fusion penetration zone 22;
and an adhesive layer 30.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The following first describes the electrical connection structure 100 of the lithium ion battery according to an embodiment of the present invention with reference to the drawings.
As shown in fig. 1 to 4, an electrical connection structure 100 of a lithium ion battery according to an embodiment of the present invention includes a first metal sheet 10, a second metal sheet 20, and an adhesive layer 30.
Specifically, the melting point of the second metal sheet 20 is smaller than the melting point of the first metal sheet 10, the difference between the melting points of the second metal sheet 20 and the first metal sheet 10 is greater than 500 ℃, the second metal sheet 20 is attached to one side of the first metal sheet 10 and is connected with the first metal sheet 10 in a welding mode, a welding penetration region 22 penetrating through the second metal sheet 20 in the thickness direction is formed by welding the second metal sheet 20, an annular welding region 21 is formed at the annular edge of the periphery of the welding penetration region 22, the annular welding region 21 is connected with the first metal sheet 10, and the bonding layer 30 is at least arranged in the welding penetration region 22 and is connected with the annular welding region 21 and the first metal sheet 10 to connect the first metal sheet 10 with the second metal sheet 20.
In other words, according to the utility model discloses lithium ion battery's electric connection structure 100 mainly comprises first sheetmetal 10, second sheetmetal 20 and adhesive linkage 30, when welding first sheetmetal 10 and second sheetmetal 20 that the melting point difference is great (the melting point difference is greater than 500 ℃), laminate first sheetmetal 10 and second sheetmetal 20 earlier, then weld, in welding process, can be formed with the welding penetrating region 22 that link up on the second sheetmetal 20, the region that the welding formed is annular welding district 21, set up the adhesive linkage again in annular welding district 21, can further bond first sheetmetal 10 and second sheetmetal 20 through the adhesive linkage. It should be noted that the welding process may include the following steps: (1) the melting point of the first metal sheet 10 is lower than the melting point of the second metal sheet 20, after the first metal sheet 10 and the second metal sheet 20 are attached, the first metal sheet 10 and the second metal sheet 20 are welded along the direction from the position of the first metal sheet 10 to the position of the second metal sheet 20, and the energy generated by welding may be between the melting point of the first metal sheet 10 and the melting point of the second metal sheet 20 or greater than the melting point of the second metal sheet 20; (2) the melting point of the first metal sheet 10 is greater than the melting point of the second metal sheet 20, after the first metal sheet 10 and the second metal sheet 20 are attached to each other, the first metal sheet 10 and the second metal sheet 20 are welded to each other in a direction from the position of the first metal sheet 10 to the position of the second metal sheet 20, and the energy generated by welding may be between the melting point of the first metal sheet 10 and the melting point of the second metal sheet 20, or may be greater than the melting point of the first metal sheet 10; (3) the first metal sheet 10 and the second metal sheet 20 are partially or nearly attached, the rest parts can be distributed at intervals, the welding area is welded through the gap between the first metal sheet 10 and the second metal sheet 20, and the welding mode can adopt electric welding or laser welding.
Therefore, according to the utility model discloses lithium ion battery's electric connection structure 100, adopt first sheetmetal 10, second sheetmetal 20 and adhesive linkage 30 to combine together, at first weld the processing of welding to connecting material (first sheetmetal 10 and second sheetmetal 20) through the welding mode, guarantee the connection performance between first sheetmetal 10 and the second sheetmetal 20, meanwhile, this application technical scheme is through coating the binder (adhesive linkage 30) that has good bonding ability with the metal in the weld zone, fill adhesive linkage 30 in annular weld zone 21, can bond together penetrating the first sheetmetal 10 that exposes in the district and annular weld zone 21 and peripheral first sheetmetal 10, provide the higher mechanical connection of intensity. The electrical connection structure 100 of the lithium ion battery further improves the electrical connection performance between the welding base materials while ensuring the strength between the welding base materials (the first metal sheet 10 and the second metal sheet 20), thereby ensuring excellent electrical performance and mechanical strength between the welding base materials.
According to an embodiment of the present invention, the second metal sheet 20 is aluminum or an alloy thereof. The iron-based material piece and the aluminum alloy material piece are selected for welding connection, and the problem of poor welding performance can be caused in the conventional welding process mainly due to the fact that the melting point difference between the iron-based material piece and the aluminum alloy material piece is large, so that the electric connection performance and the welding strength of the iron-based material piece and the aluminum alloy material piece need to be improved by arranging the bonding layer 30 in the annular welding area 21 formed by welding.
In some embodiments of the present invention, the first metal sheet 10 is a carbon steel sheet or a stainless steel sheet, and the processing range is wide.
As shown in fig. 3, further, an orthographic projection of the second metal sheet 20 on the first metal sheet 10 is located inside the first metal sheet 10, and the size of the second metal sheet 20 is smaller than that of the first metal sheet 10. Each second metal sheet 20 is provided with at least one annular welding zone 21, one welding penetration zone 22 and one bonding layer 30, that is, by providing a plurality of welding points on the second metal sheet 20, the annular welding zone 21 formed after welding can make the first metal sheet 10 and the second metal sheet 20 effectively welded, and the bonding treatment is carried out through the bonding layer 30 while the metal sheets are effectively welded and combined, so that the electrical property and the mechanical strength of the first metal sheet 10 and the second metal sheet 20 are further improved.
As shown in fig. 4, a plurality of second metal sheets 20 are optionally provided on the first metal sheet 10, and each second metal sheet 20 is provided with an annular fusion-bonding region 21, a fusion-bonding penetration region 22 and an adhesive layer 30. That is, by providing a plurality of second metal sheets 20 on one side of the first metal sheet 10, performing a welding process between each second metal sheet 20 and the first metal sheet 10, and performing an adhesion process on the ring-shaped welded region 21 through the adhesive layer 30 after the welding is completed, effective connection is formed on the first metal sheet 10 with the plurality of second metal sheets 20, and electrical properties and mechanical strength of the first metal sheet 10 and the second metal sheets 20 are further improved.
In some embodiments of the present invention, the annular welding zone 21 is formed in a circular ring shape, a square ring shape, or a polygonal shape, and a suitable welding structure is selected according to different welding requirements.
According to an embodiment of the present invention, the thickness of the adhesive layer 30 is less than 0.2 mm. Through the optimization reduction to adhesive linkage 30 thickness, when guaranteeing that adhesive linkage 30 has excellent adhesion properties, guarantee that battery construction material has more excellent structure size when in actual use, satisfy the demand of current battery material to adhesive linkage 30 thickness.
Wherein, according to the utility model discloses an embodiment, the internal diameter of annular weld zone 21 is 1/2 of external diameter, and through injecing the internal diameter and the external diameter in annular weld zone 21, select suitable butt fusion width, when not reducing the mechanical properties of welding back material, effectively improve the electric connection performance between first sheetmetal 10 and the second sheetmetal 20.
As shown in fig. 2, optionally, the adhesive layer 30 covers the second metal sheet 20 and at least a portion thereof extends beyond the outer periphery of the second metal sheet 20. That is, the local structure of the adhesive layer 30 may extend beyond the edge of the second metal sheet 20, so as to reinforce the entire welding area and satisfy the connection performance between the entire welding parts. That is, the first metal sheet 10 and the second metal sheet 20 may be connected not only by welding, but also the adhesive layer 30 may sufficiently provide a bonding force to improve the bonding strength between the first metal sheet 10 and the second metal sheet 20.
According to the utility model discloses an embodiment, second sheetmetal 20 with first sheetmetal 10 passes through laser welding and links to each other, adopts laser welding can improve the welding area precision, satisfies high accuracy part production and processing requirement. Preferably, the adhesive layer 30 is an epoxy resin layer or a UV-curable resin layer, and the epoxy resin or the UV-curable resin has excellent connection strength with the metal sheets, so that the bonding strength between the metal sheets after welding can be effectively improved.
In summary, the electrical connection structure 100 of the lithium ion battery according to the embodiment of the present invention employs a device in which the first metal sheet 10, the second metal sheet 20, and the adhesive layer 30 are combined, and after the welding process is performed on the first metal sheet 10 and the second metal sheet 20, the adhesive layer 30 is disposed in the annular welding zone 21 formed by welding, so as to ensure the strength between the welding substrates, and further improve the electrical connection performance between the welding substrate materials, thereby ensuring excellent electrical performance and mechanical strength between the welding substrate materials.
According to the utility model discloses lithium ion battery, because according to the utility model discloses lithium ion battery's electric connection structure 100 of above-mentioned embodiment has above-mentioned technological effect, consequently, according to the utility model discloses lithium ion battery also has corresponding technological effect, and electric connection performance is excellent promptly, and bonding strength is high.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An electrical connection structure of a lithium ion battery, characterized by comprising:
a first metal sheet;
the melting point of the second metal sheet is smaller than that of the first metal sheet, the difference value between the melting point of the second metal sheet and the melting point of the first metal sheet is larger than 500 ℃, the second metal sheet is attached to one side of the first metal sheet and is connected with the first metal sheet in a welding mode, a welding penetrating area penetrating along the thickness direction of the second metal sheet is formed by welding the second metal sheet, an annular welding area is formed on the annular edge of the periphery of the welding penetrating area, and the annular welding area is connected with the first metal sheet;
and the bonding layer is at least arranged in the welding penetration area and is connected with the annular welding area and the first metal sheet so as to connect the first metal sheet and the second metal sheet.
2. The electrical connection structure of a lithium ion battery according to claim 1, wherein the first metal sheet is made of iron or an alloy thereof, and the second metal sheet is made of aluminum or an alloy thereof.
3. The electrical connection structure of a lithium ion battery according to claim 2, wherein the first metal sheet is a carbon steel sheet or a stainless steel sheet.
4. The electrical connection structure of lithium ion battery as claimed in claim 1, wherein the orthographic projection of the second metal sheets on the first metal sheet is located in the first metal sheet, and each of the second metal sheets is provided with at least one of the annular welding zone, one of the welding penetration zone and one of the adhesive layers.
5. The electrical connection structure of lithium ion battery as claimed in claim 4, wherein a plurality of said second metal sheets are provided on said first metal sheet, and each of said second metal sheets is provided with one of said annular welding zone, one of said welding penetration zone and one of said adhesive layers.
6. The electrical connection structure of a lithium ion battery according to any one of claims 1 to 5, wherein the ring-shaped fusion-bonding region is formed in a ring shape, a square ring shape, or a polygonal shape.
7. The electrical connection structure of a lithium ion battery according to claim 1, wherein the thickness of the adhesive layer is less than 0.2 mm.
8. The electrical connection structure of lithium ion battery as claimed in any one of claims 1 to 5, wherein the adhesive layer covers the second metal sheet and at least a part of it protrudes from the outer peripheral edge of the second metal sheet.
9. The electrical connection structure of a lithium ion battery according to any one of claims 1 to 5, wherein the second metal sheet is joined to the first metal sheet by laser welding, and the adhesive layer is an epoxy resin layer or a UV-curable resin layer.
10. A lithium ion battery comprising the electrical connection structure of the lithium ion battery according to any one of claims 1 to 9.
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| CN202020586323.4U CN211743291U (en) | 2020-04-20 | 2020-04-20 | Lithium ion battery's electric connection structure and lithium ion battery who has it |
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| CN202020586323.4U CN211743291U (en) | 2020-04-20 | 2020-04-20 | Lithium ion battery's electric connection structure and lithium ion battery who has it |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11859921B1 (en) * | 2020-02-29 | 2024-01-02 | International Mezzo Technologies, Inc. | Microtube heat exchanger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11859921B1 (en) * | 2020-02-29 | 2024-01-02 | International Mezzo Technologies, Inc. | Microtube heat exchanger |
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