CN213379838U - Auxiliary device for laser welding - Google Patents
Auxiliary device for laser welding Download PDFInfo
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- CN213379838U CN213379838U CN202022215587.1U CN202022215587U CN213379838U CN 213379838 U CN213379838 U CN 213379838U CN 202022215587 U CN202022215587 U CN 202022215587U CN 213379838 U CN213379838 U CN 213379838U
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Abstract
The utility model provides an auxiliary device for laser welding for in lithium ion battery's accessory connection operation, this auxiliary device for laser welding is including being the main part that platelike setting, and spot welding auxiliary portion and welding auxiliary portion formed on the main part, wherein, spot welding auxiliary portion can constitute the guide of carrying out the laser beam under the laser spot welding operation in accessory welding position, welding auxiliary portion sets up along with spot welding auxiliary portion to when operation main part removes and makes welding auxiliary portion be in accessory welding position, constitute the guide of carrying out the laser beam under the laser full weld operation in accessory welding position. The utility model discloses an auxiliary device for laser welding carries out the prewelding plastic of spot welding mode to utmost point ear layer through the spot welding auxiliary part that sets up to and the continuous full-length welding operation of welding auxiliary part, can eliminate the clearance between utmost point ear, and can realize that the accessory directly accomplishes the welding with laser, compare in prior art, can save welding processes, thereby have better result of use.
Description
Technical Field
The utility model relates to a lithium cell manufacture equipment technical field, in particular to auxiliary device is used to laser welding.
Background
In the process of assembling and producing the lithium ion battery, the welding technology is widely applied, the assembly of a semi-finished product battery core and a structural member is mainly completed by combining ultrasonic welding and laser welding in the current mainstream market, the ultrasonic welding is mature in application in the field of lithium batteries, and compared with the traditional welding technology, the laser welding has the advantages of high precision, high welding speed, small heat affected zone of a product, flexible and easily adjustable welding process and the like, and has huge development potential.
At present, in the production and assembly process of the lithium ion battery, the lug of the battery core and the adapter plate are welded by generally adopting ultrasonic waves, and the adapter plate and the cover plate are connected by laser for welding. The ultrasonic welding principle is that high-frequency vibration waves are transmitted to the surfaces of two objects to be welded, and the surfaces of the tab and the connecting piece are mutually rubbed under the condition of pressurization to form fusion between molecular layers. Because the self-welding mechanism exists, the problems that the product is large in damage degree and the foreign matter splashing is difficult to effectively control in the welding process can not be completely solved, and the equipment maintenance cost is high when the welding head and the welding seat are abraded in the production process to cause later-stage mass production.
Based on the above-mentioned basis, some companies have developed and used laser welding to complete the welding of the cell tabs and the adaptor plate, but there is a problem that how to eliminate the gap between the tabs is difficult to complete the laser welding, and the common method for eliminating the gap between the tabs nowadays is to use ultrasonic welding to vibrate and compact the gap between the tab layers, and then to perform the laser welding on the weld seam. That is, the existing production process flow must first pass through ultrasonic welding, then carries out laser welding, from the perspective of mass production line batch production, has no obvious advantages compared with the traditional production process, and fails to solve the problems of numerous procedures, difficult control of ultrasonic dust, large mechanical vibration of the electric core lug and the like.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing an auxiliary device is used in laser welding to can eliminate the clearance between the utmost point ear, thereby realize the direct weld of utmost point ear and apron.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
an auxiliary device for laser welding, used in a fitting connection operation of a lithium ion battery, comprising:
a main body disposed in a plate shape;
a spot welding auxiliary part formed on the main body to form a guide of a laser beam in a laser spot welding operation at a welding position of the accessory;
and a welding auxiliary part formed on the main body, wherein the welding auxiliary part is arranged along with the spot welding auxiliary part and is used for guiding a laser beam under the full-laser welding operation at the accessory welding position when the main body is operated to move and the welding auxiliary part is positioned at the accessory welding position.
Further, the spot welding auxiliary part is a plurality of through holes which are formed on the main body in a penetrating manner and are arranged at intervals.
Furthermore, a plurality of through holes are positioned on the same straight line.
Furthermore, the distance between the nearest points of two adjacent through holes is 3-4 mm.
Furthermore, the aperture of each through hole is 1 mm-20 mm.
Furthermore, the aperture of each through hole is 2 mm-5 mm.
Furthermore, the auxiliary welding part is a through long-strip-shaped through hole formed in the main body.
Further, the thickness of the main body is 8 mm-15 mm.
Compared with the prior art, the utility model discloses following advantage has:
auxiliary device for laser welding, through the main part that sets up and the spot welding auxiliary part of setting in the main part, guaranteeing under the effective compression on utmost point ear layer, can adopt the spot welding mode to realize the plastic of prewelding on utmost point ear layer to can effectively eliminate the clearance volume between utmost point ear. Through the welding auxiliary part that sets up, can realize continuous full welding operation to realize directly accomplishing utmost point ear and switching piece or with the welded connection of apron utmost point post with laser welding.
In addition, when the structure of lengthening the tab is adopted, the pre-welding reshaping of the spot welding mode is carried out on the tab layer through the spot welding auxiliary part and the continuous full-welding operation of the welding auxiliary part, so that the tab and the cover plate can be directly welded by laser.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a front view of an auxiliary device for laser welding according to an embodiment of the present invention;
fig. 2 is a front view of an auxiliary device for laser welding according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an application state of an auxiliary device for laser welding according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram illustrating a usage state of the auxiliary device for laser welding according to an embodiment of the present invention;
fig. 5 is another schematic structural diagram of a use state of the auxiliary device for laser welding according to the embodiment of the present invention;
description of reference numerals:
1. a main body; 11. a through hole; 12. a strip-shaped through hole; 10. a laser; 20. a tab; 30. a cover plate pole column; 40. a cover plate; 50. and (5) battery cores.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The embodiment relates to an auxiliary device for laser welding, which is used in the connection operation of accessories of a lithium ion battery and mainly comprises a main body, a spot welding auxiliary part and a welding auxiliary part, wherein the spot welding auxiliary part and the welding auxiliary part are formed on the main body, and the connection of the accessories of the lithium ion battery comprises the connection of a pole lug and an adapter sheet, the connection of the adapter sheet and a cover plate pole column or the connection of the pole lug and a cover plate. The spot welding assisting portion may be configured to guide the laser beam in the laser spot welding operation at the accessory welding position, and the welding assisting portion may be provided along with the spot welding assisting portion to guide the laser beam in the full laser welding operation at the accessory welding position when the welding assisting portion is located at the accessory welding position by operating the movement of the main body.
The auxiliary device for laser welding of this embodiment is guaranteeing under the effective compression to utmost point ear layer, and the spot welding auxiliary portion through setting up is with can adopting the spot welding mode to the plastic of prewelding on utmost point ear layer to effectively eliminate the clearance volume between utmost point ear. Through the welding auxiliary part that sets up, can realize the operation of full welding in succession to realize directly accomplishing utmost point ear and switching piece, switching piece and apron utmost point post or utmost point ear and the welded connection of apron with laser welding.
Based on the above design concept, an exemplary structure of the auxiliary device for laser welding of the present embodiment is shown in fig. 1 and fig. 2, the main body 1 is disposed in a plate shape for pressing the parts of the lithium ion battery to be connected, such as the tab 20, and the spot welding auxiliary part is a plurality of through holes 11 formed on the main body 1 at intervals, and preferably, the through holes 11 are located on the same straight line, so as to provide a welding reference for the welding auxiliary part described below.
Specifically, as shown in fig. 1, the distance L between the closest points of two adjacent through holes 11 in this embodiment is 3mm to 4 mm. In this way, the gap between the tabs 20 can be reduced after welding by the spot welding auxiliary portion, and the hole diameter of each through hole 11 is 1mm to 20 mm. In a preferred embodiment of the present embodiment, the diameter of each through hole 11 is 2mm to 5 mm. Therefore, the gap between the lugs 20 can be further eliminated under spot welding operation and full welding operation in the arrangement that the distance L is 3-4 mm and the aperture size is 2-5 mm, and the assembly is completed by directly adopting laser welding between the lugs 20 and the adapter plate, between the adapter plate and the cover plate pole 30 or between the lugs 20 and the cover plate 40.
The welding auxiliary part is a transparent strip-shaped through hole 12 formed in the main body 1, the center line of the strip-shaped through hole 12 is parallel to the center line of the midpoint welding auxiliary part, and the length of the strip-shaped through hole 12 is greater than the distance between the farthest points of the through holes 11 at the two ends, so that the length of full-length welding operation is longer, and the welding quality is improved.
When the auxiliary device for laser welding of the present embodiment is used, as shown in fig. 3 to 5, the connection between the tab 20 and the cover plate pole 30 shown in fig. 3 includes the following specific steps: place utmost point ear 20 on the apron utmost point post 30 that forms on apron 40, or place on the switching piece, compress tightly utmost point ear 20 through main part 1, can cooperate clamping device among the prior art simultaneously, guarantee that main part 1 places the position accuracy at utmost point ear 20, then adopt laser instrument 10 to carry out spot welding from through-hole 11 position on main part 1 to carry out the prewelding between utmost point ear 20. Then the position of the main body 1 is adjusted to align the position of the strip-shaped through hole 12 with the previous pre-welding point, and then continuous full welding is carried out to realize the connection between the tab 20 and the cover plate pole 30 by directly adopting laser welding and effectively eliminate the gap between the tab 20.
As shown in fig. 4 and 5, when the battery cell 50 adopts a structure of lengthening the tab 20, the tab 20 is compressed by the main body 1, spot welding is performed through the through hole 11 in the main body 1, then the main body 1 is moved, so that the elongated through hole 12 is aligned with the previous pre-welding point, and then full welding is performed, so that the tab 20 and the cover plate 40 can be directly connected by laser welding, the gap between the tab 20 and the cover plate 40 can be eliminated, and the requirement of directly welding the tab 20 and the cover plate 40 is met.
The auxiliary device for laser welding of the embodiment can realize the welding process of pre-welding and shaping the tab 20 in a spot welding mode and continuous full welding through the spot welding auxiliary part and the welding auxiliary part, thereby eliminating the gap amount between the tabs 20 and realizing the direct laser welding connection between the tab 20 and the cover plate 40. Compare in prior art, through adopting this auxiliary device for laser welding, can cancel connection piece structure to save welding process, thereby can improve 50 inner spaces of electric core and reduce equipment investment cost, and have better result of use.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An auxiliary device for laser welding, used in a fitting connection operation of a lithium ion battery, characterized by comprising:
a main body (1), the main body (1) being provided in a plate shape;
a spot welding auxiliary part formed on the main body (1) to form a guide for a laser beam in a laser spot welding operation at a fitting welding position;
and a welding auxiliary part formed on the main body (1), wherein the welding auxiliary part is arranged along with the spot welding auxiliary part and is used for guiding a laser beam under the full-laser welding operation at the part welding position when the main body (1) is operated to move and the welding auxiliary part is positioned at the part welding position.
2. The laser welding assist device according to claim 1, wherein: the spot welding auxiliary part is a plurality of through holes (11) which are formed on the main body (1) in a penetrating mode and are arranged at intervals.
3. The laser welding assist apparatus according to claim 2, wherein: the through holes (11) are positioned on the same straight line.
4. The laser welding assist apparatus according to claim 3, wherein: the distance between the nearest points of the two adjacent through holes (11) is 3-4 mm.
5. The laser welding assist apparatus according to claim 2, wherein: the aperture of each through hole (11) is 1 mm-20 mm.
6. The laser welding assist apparatus according to claim 5, wherein: the aperture of each through hole (11) is 2 mm-5 mm.
7. The laser welding assist apparatus according to any one of claims 1 to 6, characterized in that: the welding auxiliary part is a through long-strip-shaped through hole (12) formed in the main body (1).
8. The laser welding assist apparatus according to any one of claims 1 to 6, characterized in that: the thickness of the main body (1) is 8-15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022215587.1U CN213379838U (en) | 2020-09-30 | 2020-09-30 | Auxiliary device for laser welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022215587.1U CN213379838U (en) | 2020-09-30 | 2020-09-30 | Auxiliary device for laser welding |
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| Publication Number | Publication Date |
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| CN213379838U true CN213379838U (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022215587.1U Active CN213379838U (en) | 2020-09-30 | 2020-09-30 | Auxiliary device for laser welding |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113751906A (en) * | 2021-08-31 | 2021-12-07 | 惠州亿纬锂能股份有限公司 | Lug welding method, battery core lug and battery |
| CN113794028A (en) * | 2021-09-30 | 2021-12-14 | 兰钧新能源科技有限公司 | Lithium battery and welding process for lithium battery explosion-proof valve |
-
2020
- 2020-09-30 CN CN202022215587.1U patent/CN213379838U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113751906A (en) * | 2021-08-31 | 2021-12-07 | 惠州亿纬锂能股份有限公司 | Lug welding method, battery core lug and battery |
| CN113794028A (en) * | 2021-09-30 | 2021-12-14 | 兰钧新能源科技有限公司 | Lithium battery and welding process for lithium battery explosion-proof valve |
| CN113794028B (en) * | 2021-09-30 | 2024-03-19 | 兰钧新能源科技有限公司 | Lithium battery and welding process of explosion-proof valve of lithium battery |
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Address after: No.8899 Xincheng Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee after: SVOLT Energy Technology Co.,Ltd. Address before: No.8899 Xincheng Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee before: SVOLT Energy Technology Co.,Ltd. |
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