CN216648446U - Steel shell structure and laser welding device - Google Patents
Steel shell structure and laser welding device Download PDFInfo
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- CN216648446U CN216648446U CN202122679556.6U CN202122679556U CN216648446U CN 216648446 U CN216648446 U CN 216648446U CN 202122679556 U CN202122679556 U CN 202122679556U CN 216648446 U CN216648446 U CN 216648446U
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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 belongs to the technical field of battery production and manufacturing, and particularly relates to a steel shell structure and a laser welding device, which comprise a first shell (1); the second shell (2) and the second shell (2) enclose a space for accommodating the battery core; first casing (1) is provided with opening (11), opening (11) are provided with first flange (3), second casing (2) be provided with first flange (3) complex second flange (4), first flange (3) with form first contained angle between first casing (1), second flange (4) with form the second contained angle between second casing (2), first contained angle with the second contained angle is complementary. The utility model can solve the problem that the naked battery cell is arranged in the shell, also reduces the risk of welding slag splashing, and is beneficial to improving the quality of the battery.
Description
Technical Field
The utility model belongs to the technical field of battery production and manufacturing, and particularly relates to a steel shell structure and a laser welding device.
Background
Nowadays, green, high-efficiency secondary batteries are vigorously developed in various countries. The lithium ion battery as a novel secondary battery has the advantages of large energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large-scale energy storage, electric traffic power supplies and the like.
At present, the casing combination about the little electric core box hat structure is mostly, puts into cuboid box hat cavity with the electric core of welding good anodal utmost point ear, and the phenomenon that the cover is rotten, the diaphragm cover turns over can appear, and conventional flange adopts laser spot welding's mode to weld the flange all around, has the welding slag phenomenon of splashing.
SUMMERY OF THE UTILITY MODEL
One of the objects of the present invention is: to prior art's not enough, provide a steel-shelled structure, can solve the problem that naked electric core packs into the casing, still reduce the risk that the welding slag splashes, help improving the quality of battery.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a steel shell structure comprising a first shell; the second shell and the second shell enclose a space for accommodating the battery cell; the first casing is provided with the opening, the opening is provided with first flange, the second casing be provided with first flange complex second flange, first flange with form first contained angle between the first casing, the second flange with form the second contained angle between the second casing, first contained angle with the second contained angle is complementary.
Preferably, the first flange is disposed around the opening.
Preferably, the first shell and the second shell are both symmetrical structures.
Preferably, the cross section of the first shell is triangular, L-shaped or square.
Preferably, the first shell and the second shell are both in a through groove structure.
The laser welding device comprises a laser and an air extractor, wherein the laser is arranged above a welding area, and the air extractor is arranged on the side of the welding area.
Preferably, the laser is a ring-shaped QCW quasi-continuous laser.
Preferably, the welding device further comprises a cavity surrounding the welding area.
The utility model has the advantages that the utility model comprises a first shell; the second shell and the second shell enclose a space for accommodating the battery cell; the first casing is provided with the opening, open, the second casing be provided with first flange complex second flange, first flange with form first contained angle between the first casing, the second flange with form the second contained angle between the second casing, first contained angle with the second contained angle is complementary. Because the prior small-cell steel shell structure is mostly combined by an upper shell and a lower shell, the cell welded with the positive pole lug is placed in a cuboid steel shell cavity, the phenomena of rotten sheathing and overturning of a diaphragm can occur, and the conventional flange is welded around the flange in a laser spot welding mode, so that the welding slag splashing phenomenon exists, therefore, the structure comprises a first shell and a second shell which are irregular, the first shell and the second shell are of a multi-surface structure and are spliced to form a square steel shell structure, the multi-surface structure can be used for conveniently welding the bare cell lug on the steel shell or the shell, the bare cell is convenient to shell installation, the problems of rotten diaphragm sheathing and overturning of the bare cell in the shell are solved, in addition, the first flange and the second flange can be selected to form different angles with the plane to reduce the area of a splashing area, and the welding ratio of the flange at one side at an obtuse angle with the shell is less splashing in welding right-angle, reducing the risk of splashing. The utility model can solve the problem that the bare cell is arranged in the shell, also reduces the risk of welding slag splashing, and is beneficial to improving the quality of the battery.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic splicing diagram of a first embodiment of the present invention.
Fig. 2 is a schematic splicing diagram of a second embodiment of the present invention.
Fig. 3 is a schematic splicing diagram of a third embodiment of the present invention.
Fig. 4 is a schematic splicing diagram of a fourth embodiment of the present invention.
Fig. 5 is a schematic view of one structure of the laser welding apparatus of the present invention.
Fig. 6 is another schematic configuration diagram of the laser welding apparatus of the present invention.
Wherein the reference numerals are as follows:
1-a first housing; 11-opening;
2-a second housing;
3-a first flange;
4-a second flange;
5-a laser;
6-an air extractor;
7-a welding area;
8-the cavity.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in further detail with reference to fig. 1 to 6, but the present invention is not limited thereto.
Implementation mode one
The following describes embodiment one with reference to fig. 1
A steel shell structure comprising a first shell 1; the second shell 2 and the second shell 2 enclose a space for accommodating the battery core; the first shell 1 is provided with an opening 11, the opening 11 is provided with a first flange 3, the second shell 2 is provided with a second flange 4 matched with the first flange 3, a first included angle is formed between the first flange 3 and the first shell 1, a second included angle is formed between the second flange 4 and the second shell 2, and the first included angle and the second included angle are complementary.
Because the prior small-cell steel shell structure is mostly combined by an upper shell and a lower shell, the cell welded with the positive pole lug is placed in a cuboid steel shell cavity, the phenomena of rotten sheathing and overturning of a diaphragm can occur, and the conventional flange is welded around the flange in a laser spot welding mode, and the welding slag splashing phenomenon exists, therefore, the small-cell steel shell structure is formed by a first shell 1 and a second shell 2 which are irregular, the first shell 1 and the second shell 2 are of a multi-surface structure and are spliced to form a square steel shell structure, the multi-surface structure has the advantages that a naked cell lug can be conveniently welded on a steel shell pole column or a shell, the naked cell is convenient to shell, the problems that the naked cell is placed in the shell and is rotten and overturned by the diaphragm are solved, in addition, the first flange 3 and the second flange 4 can be selected to form different angles with the plane to reduce the splashing area, and the welding of the flange at one side of the angle with the shell is less right-angle than that the welding of the flange at the right-angle, reducing the risk of splashing.
In the steel shell structure according to the present invention, the first flange 3 is disposed around the opening 11, and the second flange 4 is matched with the first flange 3, which helps to improve the sealing performance between the first case 1 and the second case 2 and reduce the probability of leakage of the electrolyte.
In the steel shell structure according to the present invention, the cross section of the first shell 1 is triangular, specifically, the cross sections of the first shell 1 and the second shell 2 are both triangular structures, the first shell 1 and the second shell 2 are spliced into a square steel shell structure, the first flange 3 and one of the planes of the first shell 1 form an included angle of 45 °, and similarly, the second flange 4 and one of the planes of the second shell 2 also form an included angle of 45 °, such that a splashing risk can be reduced, but the present invention is not limited thereto, and an angle of the included angle can be adjusted according to actual production requirements.
In the steel shell structure according to the present invention, the first shell 1 and the second shell 2 are both symmetrical structures, but the present invention is not limited thereto, and the first shell 1 and the second shell 2 may also adopt asymmetrical structures.
The working principle of the utility model is as follows:
adopt first casing 1 of non-rule and second casing 2 to constitute, first casing 1 and second casing 2 are the multiaspect structure, constitute square steel-shelled structure through the concatenation, this kind of multiaspect structure has concurrently and conveniently welds naked electric core utmost point ear on steel-shelled utmost point post or casing, and naked electric core dress shell is convenient, it is rotten that the casing of packing into to solve naked electric core has the diaphragm cover, the problem that the diaphragm cover turned over, furthermore, first flange 3 and second flange 4 can select and become different angles with place plane, in order to reduce the regional area that splashes, make the welding position farther from electric core main part distance, reduce the risk that splashes.
Second embodiment
The difference from the first embodiment is that: the first casing 1 of the present embodiment has an L-shaped cross section, and both the first casing 1 and the second casing 2 have an asymmetric structure. Specifically, first casing 1 is L shape structure, and first casing 1 has two mutually perpendicular planes, and second casing 2 and first casing 1 are complementary structure, and both splice into square steel-shelled turtle structure, and the edge of first casing 1 is equipped with first flange 3, and the edge of second casing 2 is equipped with second flange 4, and first flange 3 and second flange 4 welding are in the same place, realize sealing the steel-shelled turtle.
Other structures are the same as those of the first embodiment, and are not described herein again.
Third embodiment
The difference from the first embodiment is that: the cross section of the first shell 1 of the present embodiment is square, specifically, the first shell 1 has three planes perpendicular to each other, the second shell 2 and the first shell 1 are of complementary structures, and are symmetrical to each other, and are spliced into a square steel shell structure, and in three dimensions, the plane of the first shell 1 and the plane of the second shell 2 do not overlap.
Other structures are the same as those of the first embodiment, and are not described herein again.
Embodiment IV
The difference from the first embodiment is that: the first shell 1 and the second shell 2 of the embodiment are both of through groove structures, the first shell 1 and the second shell 2 are staggered with each other when being installed and are spliced into a square steel shell structure, and in three dimensions, the plane of the first shell 1 and the plane of the second shell 2 are not overlapped.
Other structures are the same as those of the first embodiment, and are not described herein again.
Laser welding device
The laser welding apparatus includes a laser 5 and an air extractor 6 for welding the steel shell structure according to the first to fourth embodiments, wherein the laser 5 is disposed above the welding area 7, and the air extractor is disposed on the side of the welding area 7. In this embodiment, because the material has different absorption rates for the laser beams with different wavelengths at different temperatures, when the material is initially heated, the absorption rate of the material for the laser beams is low, and when the material reaches the melting point, the absorption rate sharply increases, and when the liquid molten pool reaches a certain temperature or the material vaporizes beyond the boiling point, the absorption rate continues to increase, a large amount of plasma is generated, and a large amount of splashing is generated, while the front edge of the ring beam raises the temperature of the welding spot to a high enough value to increase the absorption capacity of the ring beam for the laser beams, and the center of the beam generates a deep molten hole. Because the fusion hole is stable, the material is not easy to quickly solidify, the whole process is more consistent, the process window is larger, and finally uniform material penetration and high-quality non-splash welding seams are realized, but the generation of plasma or splash cannot be completely avoided, compact plasma can change the refraction, scattering and absorption effects of laser beams, instability is increased, and meanwhile, the compact plasma is very difficult to control, so that the air extractor 6 is added on welding equipment, the vaporized metal/compact plasma does not influence the continuous welding effect or fall onto the surface of a battery cell, and the influence on the appearance is avoided.
Preferably, the laser 5 is a ring QCW quasi-continuous type laser, capable of producing a ring laser beam and a central beam. Compared with the conventional laser welding process, the QCW quasi-continuous laser welding has the advantages of small volume, high conversion efficiency, low energy consumption, small core diameter, precise processing and the like, and the annular laser avoids a single Gaussian distribution laser beam, is changed into a more complex annular beam and a more complex central beam, and can effectively reduce splashing.
Preferably, a cavity 8 is further included, the cavity 8 surrounding the welding area 7. The cavity 8 is an inert gas cavity, because inert gas does not react with other elements, electron collision reaction is less, ionization types are less, generation of plasma is inhibited, an inert gas environment is provided for laser welding, generation of compact plasma is avoided, and welding effect is improved.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the utility model as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (8)
1. A steel shell structure, comprising:
a first housing (1);
the second shell (2) and the second shell (2) enclose a space for accommodating the battery core;
the first shell (1) is provided with an opening (11), the opening (11) is provided with a first flange (3), and the second shell (2) is provided with a second flange (4) matched with the first flange (3); a first included angle is formed between the first flange (3) and the first shell (1), a second included angle is formed between the second flange (4) and the second shell (2), and the first included angle and the second included angle are complementary.
2. A steel shell structure according to claim 1, wherein: the first flange (3) is arranged around the opening (11).
3. A steel shell structure according to claim 1, wherein: the first shell (1) and the second shell (2) are both of symmetrical structures.
4. A steel shell structure according to claim 1, wherein: the cross section of the first shell (1) is triangular, L-shaped or square.
5. A steel shell structure according to claim 1, wherein: the first shell (1) and the second shell (2) are both of a through groove structure.
6. A laser welding device is characterized in that: comprising a laser (5) and an air extractor (6) for welding the steel shell structure according to any of the claims 1-5, said laser (5) being arranged above the welding area (7) and said air extractor being arranged to the side of the welding area (7).
7. A laser welding apparatus as defined in claim 6, wherein: the laser (5) is an annular QCW quasi-continuous laser.
8. A laser welding apparatus as defined in claim 6, wherein: further comprising a cavity (8), the cavity (8) surrounding the welding area (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122679556.6U CN216648446U (en) | 2021-11-04 | 2021-11-04 | Steel shell structure and laser welding device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122679556.6U CN216648446U (en) | 2021-11-04 | 2021-11-04 | Steel shell structure and laser welding device |
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| Publication Number | Publication Date |
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| CN216648446U true CN216648446U (en) | 2022-05-31 |
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| CN202122679556.6U Active CN216648446U (en) | 2021-11-04 | 2021-11-04 | Steel shell structure and laser welding device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117638333A (en) * | 2024-01-25 | 2024-03-01 | 蜂巢能源科技股份有限公司 | Single battery and preparation method thereof |
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2021
- 2021-11-04 CN CN202122679556.6U patent/CN216648446U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117638333A (en) * | 2024-01-25 | 2024-03-01 | 蜂巢能源科技股份有限公司 | Single battery and preparation method thereof |
| CN117638333B (en) * | 2024-01-25 | 2024-04-09 | 蜂巢能源科技股份有限公司 | Single battery and preparation method thereof |
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