CN109551125B - Power battery flexible coupling welding position anchor clamps - Google Patents
Power battery flexible coupling welding position anchor clamps Download PDFInfo
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- CN109551125B CN109551125B CN201811575719.2A CN201811575719A CN109551125B CN 109551125 B CN109551125 B CN 109551125B CN 201811575719 A CN201811575719 A CN 201811575719A CN 109551125 B CN109551125 B CN 109551125B
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- base
- top cover
- block
- positioning
- connecting rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The embodiment of the invention is suitable for the technical field of clamps and provides a welding and positioning clamp for power battery flexible connection. This positioning fixture includes the base, a plurality of springs, a second that is used for fixed electric core to open to press from both sides the mechanism and is used for fixed top cap opens and presss from both sides the mechanism, first open to press from both sides the mechanism and install on the base with the equal slidable of second division clamp mechanism, the one end of a plurality of springs all is fixed in on the base, the other end and the first division of clamp mechanism of part spring are connected, the elastic force of spring can drive first division of clamp mechanism and press from both sides tight fixed to electric core, the other end and the second of part spring open and press from both sides the mechanism and be connected, the elastic force of spring can drive the second and open and press from both sides the mechanism and press from both sides the fastening fixed to the top cap. The invention has the advantages of simple control, low manufacturing cost, accurate positioning and high positioning efficiency.
Description
Technical Field
The invention belongs to the technical field of clamps, and particularly relates to a power battery flexible connection welding positioning clamp.
Background
The country supports the development of new energy greatly in recent years, and the demand of various manufacturers on new energy power batteries is greatly increased. Welding equipment manufactured by a plurality of manufacturers at the present stage has obvious gap between the precision and efficiency of the flexible connection laser welding of the new energy power battery and market requirements.
Traditional power battery flexible coupling welding position anchor clamps adopt cylinder drive to go on about, around location electricity core and top cap usually, its positioning accuracy is not high to its solenoid valve is many, and the pipeline is complicated, and control is complicated, and no matter carousel formula or line body formula cyclic utilization, all can have to walk defects such as line difficulty, manufacturing cost height.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a welding and positioning fixture for power battery flexible connection, aiming at solving the problems of complex control and high manufacturing cost in the prior art that the welding and positioning fixture for power battery flexible connection is driven and positioned by a cylinder.
The embodiment of the invention is realized in such a way, and provides a welding and positioning fixture for the flexible connection of a power battery, which comprises a base, a plurality of springs, a first clamp opening mechanism for fixing a battery core and a second clamp opening mechanism for fixing a top cover, wherein the springs are arranged on the base;
the battery cell clamping device is characterized in that the first clamping opening mechanism and the second clamping opening mechanism are slidably mounted on the base, one ends of the springs are fixed on the base, the other ends of the springs are connected with the first clamping opening mechanism, the elastic force of the springs can drive the first clamping opening mechanism to clamp and fix a battery cell, the other ends of the springs are connected with the second clamping opening mechanism, the elastic force of the springs can drive the second clamping opening mechanism to clamp and fix a top cover, and when the battery cell and the top cover are fixed, the springs are in a compression state.
Furthermore, the first clamp opening mechanism comprises a plurality of clamping mechanisms and a plurality of connecting rod mechanisms, the clamping mechanisms are slidably mounted on the base, the springs are connected with part of the clamping mechanisms, and two ends of each connecting rod mechanism are respectively connected with two opposite clamping mechanisms.
Furthermore, two battery cell placing parts are arranged on the base, and the clamping mechanisms are arranged on the periphery of each battery cell placing part.
Further, clamping mechanism includes guide block, guide rail and is used for supporting the tight piece of clamp of electric core, the guide rail install in the bottom of base, press from both sides tight piece slidable install in on the guide rail, the one end of guide block with press from both sides tight piece and be connected, the other end of guide block with spring coupling, link mechanism's both ends are connected two respectively and are relative press from both sides tight piece.
Further, the link mechanism comprises a rotating seat, a driving rotating seat, a first link and a second link;
the swivel mount install in on the base, the drive swivel mount can install on the swivel mount rotatoryly, the one end of first connecting rod can connect in one turnedly press from both sides tight piece, the other end of first connecting rod can connect in rotatoryly the one end of drive swivel mount, the one end of second connecting rod can connect in rotatoryly the other end of drive swivel mount, the other end of second connecting rod connect in another press from both sides tight piece.
Further, the rotating seat comprises a central shaft and a bearing, the central shaft is fixed on the base, an inner ring of the bearing is installed on the central shaft, and the center of the driving rotating seat is sleeved on an outer ring of the bearing.
Further, the middle part of base is fixed with the base that is used for placing the top cap, the long limit one side of base sets firmly and is used for supplying the baffle that the top cap supported, install the top cap dog on the base, the top cap dog is located minor face one side of base.
Further, the second clamp opening mechanism comprises a short side positioning mechanism for positioning the end part of the short side of the top cover and a long side positioning mechanism for positioning the end part of the long side of the top cover;
the short edge positioning mechanism comprises a first top cover positioning block, a first driving block, a first sliding rail and a connecting piece, the first top cover positioning block is installed on the first driving block, the first driving block is installed on the first sliding rail in a sliding mode, the first sliding rail is installed on the base, one end of the spring is fixed on the base, and the other end of the spring is connected with the first driving block through the connecting piece;
the long-edge positioning mechanism comprises a driving rod, a connecting rod and two abutting mechanisms arranged at intervals, the abutting mechanisms can be slidably mounted on the base, two ends of the connecting rod are respectively connected with the two abutting mechanisms, and one end of the spring is connected to one of the abutting mechanisms through the driving rod.
Furthermore, the abutting mechanism comprises a second top cover positioning block, a second driving block and a second sliding rail, the second top cover positioning block is mounted on the second driving block, the second driving block is slidably mounted on the second sliding rail, the second sliding rail is mounted on the base, and one end of the spring is connected with the second driving block through the driving rod.
Furthermore, the baffle, the top cover stop block, the first top cover positioning block and the second top cover positioning block are all insulating pieces.
Compared with the prior art, the embodiment of the invention has the advantages that: according to the battery cell positioning and fixing device, the first clamp opening mechanism is driven to position and fix the battery cell and the second clamp opening mechanism is driven to position and fix the top cover through the elastic force of the spring, so that the battery cell and the top cover can be placed and positioned, when the battery cell and the top cover need to be loosened, the first clamp opening mechanism can be loosened to fix the battery cell and the second clamp opening mechanism can be loosened to fix the top cover only by overcoming the elastic force of the spring, and the battery cell positioning and fixing device is simple and convenient to control and low in manufacturing cost.
Drawings
Fig. 1 is a schematic front structural view of a power battery flexible connection welding positioning fixture provided by an embodiment of the invention;
fig. 2 is a schematic diagram of a state of the power battery shown in fig. 1 after the battery core and the top cover are positioned by the power battery flexible connection welding positioning fixture;
FIG. 3 is a schematic diagram of a reverse structure of the power battery flexible connection welding positioning fixture shown in FIG. 1;
FIG. 4 is a schematic bottom view of the positioning fixture for welding the power battery soft connection shown in FIG. 1;
FIG. 5 is a schematic view of the connection of the clamping mechanism and the linkage mechanism of FIG. 3;
fig. 6 is a schematic structural view of the long-side positioning mechanism in fig. 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to fig. 3, the positioning fixture for welding the power battery flexible connection provided by the embodiment of the invention is provided. The power battery flexible connection welding positioning fixture comprises a base 1, a plurality of springs 2, a first clamping opening mechanism for fixing a battery core and a second clamping opening mechanism for fixing a top cover. Wherein, first division of pressing from both sides mechanism and second division of pressing from both sides the mechanism and all install on base 1 slidable, and the one end of a plurality of springs 2 is all fixed in on base 1, and the other end of part spring 2 is connected with first division of pressing from both sides mechanism, and the elastic force of spring 2 can drive first division of pressing from both sides the mechanism and press from both sides tight fixedly to electric core A, and the other end of part spring 2 is connected with second division of pressing from both sides mechanism, and the elastic force of spring 2 can drive second division of pressing from both sides the mechanism and press from both sides tightly fixedly to top cap. When the battery cell A and the top cover B are fixed, the spring 2 is in a compressed state to ensure that the battery cell A and the top cover B are stably clamped.
Referring to fig. 5, the first clip opening mechanism includes a plurality of clamping mechanisms 3 and a plurality of link mechanisms 4, the clamping mechanisms 3 are slidably mounted on the base 1, the springs 2 are connected to a portion of the clamping mechanisms 3, and two ends of the link mechanisms 4 are respectively connected to two opposite clamping mechanisms 3.
The clamping mechanism 3 comprises a guide block 31, a guide rail 32 and a clamping block 33 for abutting against the battery core a, the guide rail 32 is mounted at the bottom end of the base 1, the clamping block 33 can be slidably mounted on the guide rail 32, one end of the guide block 31 is connected with the clamping block 33, the other end of the guide block 31 is connected with the spring 2, and two opposite clamping blocks 33 are respectively connected with two ends of the link mechanism 4.
The link mechanism 4 includes a rotary base 41, a driving rotary base 42, a first link 43 and a second link 44, the rotary base 41 is mounted on the base 1, the driving rotary base 42 is rotatably mounted on the rotary base 41, one end of the first link 43 is rotatably connected to one of the clamping blocks 33, the other end of the first link 43 is rotatably connected to one end of the driving rotary base 42, one end of the second link 44 is rotatably connected to the other end of the driving rotary base 42, and the other end of the second link 44 is connected to the other clamping block 33. The rotating base 41 includes a central shaft fixed on the base 1 and a bearing, an inner ring of the bearing is installed on the central shaft, and a center of the driving rotating base 42 is sleeved on an outer ring of the bearing.
Through the connection between the clamping mechanism 3 and the link mechanism 4, the guide block 31 on one clamping mechanism 3 can be driven by the elastic force of the spring 2 to drive the clamping block 33 to move along the extending direction of the guide rail 32, meanwhile, the first connecting rod 43 is driven by the movement of the clamping block 33 to rotate, the first connecting rod 43 drives the driving swivel mount 42 to rotate, the driving swivel mount 42 drives the second connecting rod 44 to rotate, the second connecting rod 44 drives the clamping block 33 on the other clamping mechanism 3 to move along the extending direction of the guide rail 32, so that the elastic force of the spring 2 and the linkage principle of the link mechanism 4 can be utilized, the clamping blocks 33 on the two opposite clamping mechanisms 3 can be simultaneously contracted to clamp and position the battery cell a, and the control is simple. In this embodiment, two battery cell placing portions 11 are arranged on the base 1, a clamping mechanism 3 is arranged around each battery cell placing portion 11, each clamping mechanism 3 is driven by a spring 2 to draw close to the battery cell a from the periphery of the battery cell a, the battery cell a is compressed, the center of the battery cell a is positioned, the positioning precision is high, the problem of non-uniform positioning caused by the size error of the battery cell a is avoided, the positioning uniformity of the battery cell a is ensured, and the assembly welding uniformity of the battery cell a and the top cover B is realized.
In the above embodiment, the base 12 for placing the top cover B is fixed in the middle of the base 1, and the base 12 is located between the two battery cell placing portions 11, so that the battery cell a and the top cover B can be conveniently connected. The baffle 121 used for the top cover B to abut against is fixedly arranged on one side of the long edge of the base 12, the top cover stop block 13 is fixedly arranged on the base 1, and the top cover stop block 13 is located on one side of the short edge of the base 12 so as to position one end of the long edge and one end of the short edge of the top cover B. The second opening and clamping mechanism comprises a short edge positioning mechanism 5 and a long edge positioning mechanism 6, wherein the short edge positioning mechanism 5 is used for positioning the end part of the other short edge of the top cover B, and the long edge positioning mechanism 6 is used for positioning the end part of the other long edge of the top cover B.
Referring to fig. 4, the short-side positioning mechanism 5 includes a first cap positioning block 51, a first driving block 52, a first sliding rail 53 and a connecting member 54, the first cap positioning block 51 is mounted on the first driving block 52, the first driving block 52 is mounted on the first sliding rail 53, the first sliding rail 53 is mounted on the base 1, one end of the spring 2 is fixed on the base 1, and the other end of the spring 2 is connected to the first driving block 52 through the connecting member 54. The short-side positioning mechanism 5 drives the first driving block 52 to move through the elastic force of the spring 2, the first driving block 52 drives the first top cover positioning block 51 to move along the extending direction of the first sliding rail 53, so that the first top cover positioning block 51 contracts to abut against one short-side end of the top cover B placed on the base 12, and therefore the top cover stop 13 and the first top cover positioning block 51 on the base 1 can be utilized to clamp and position two short-side ends of the top cover B respectively.
Referring to fig. 6, the long-side positioning mechanism 6 includes a driving rod 61, a connecting rod 62 and two abutting mechanisms 63 disposed at an interval, the abutting mechanisms 63 can be slidably mounted on the base 1, two ends of the connecting rod 62 are respectively connected to the two abutting mechanisms 63, and one end of the spring 2 is connected to one of the abutting mechanisms 63 through the driving rod 61. Specifically, the abutting mechanism 63 includes a second cap positioning block 631, a second driving block 632, and a second slide rail 633, the second cap positioning block 631 is installed on the second driving block 632, the second driving block 632 is slidably installed on the second slide rail 633, the second slide rail 633 is installed on the base 1, one end of the spring 2 is fixed on the base 1, and the other end of the spring 2 is connected to the second driving block 632 through the driving rod 61. The long-side positioning mechanism 6 drives the second driving block 632 of one of the abutting mechanisms 6 to move through the elastic force of the spring 2, the second driving block 632 drives the second top cover positioning block 631 to move along the extending direction of the second slide rail 633, so that the second top cover positioning block 631 contracts to abut against one long-side end of the top cover B placed on the base 12, the driving rod 61 simultaneously drives the second top cover positioning block 631 of the other abutting mechanism 6 to abut against the long-side end of the top cover B placed on the base 12, and therefore the baffle 121 and the second top cover positioning block 631 on the base 12 can be used for respectively clamping and positioning two long-side ends of the top cover B.
The clamping block 33, the baffle 121, the top cover stop 13, the first top cover positioning block 51 and the second top cover positioning block 631 are all insulating pieces, it is ensured that the battery cell A and the top cover B are all insulated from the positioning fixture, and rounded corners are arranged on the clamping block 33, the baffle 121, the top cover stop 13, the first top cover positioning block 51 and the second top cover positioning block 631, so that scratching to the battery cell A and the top cover B is prevented.
In summary, the first clamp opening mechanism is driven by the elastic force of the spring 2 to position and fix the battery core a and the second clamp opening mechanism is driven to position and fix the top cover B, so that the battery core a and the top cover B are placed and positioned, and the battery core a and the top cover B are assembled and welded uniformly and accurately. When the battery cell A and the top cover B need to be loosened, the first clamping opening mechanism can be loosened to fix the battery cell A and the second clamping opening mechanism can be loosened to fix the top cover B only by overcoming the elastic force of the spring 2. The long and short edge end parts of the battery core A and the long and short edge end parts of the top cover B are driven independently to clamp and position, so that the situation that one side is clamped and the other side cannot be clamped due to the size error of the long and short edges is avoided. Aiming at power battery products of different models, the positioning clamp can be produced in a shape-changing mode only by replacing the clamping block 33, the baffle plate 121, the top cover stop block 13, the first top cover positioning block 51 and the second top cover positioning block 631, has good product compatibility and adaptability, greatly improves the efficiency of producing the power battery, reduces the production cost, and has the advantages of simple and convenient control, low manufacturing cost, high positioning precision and high efficiency.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A welding and positioning fixture for power battery flexible connection is characterized by comprising a base, a plurality of springs, a first clamp opening mechanism for fixing a battery core and a second clamp opening mechanism for fixing a top cover;
the first clamp opening mechanism and the second clamp opening mechanism are slidably mounted on the base, one ends of the plurality of springs are fixed on the base, the other ends of one part of the springs are connected with the first clamp opening mechanism, the elastic force of the springs can drive the first clamp opening mechanism to clamp and fix the battery cell, the other ends of the other part of the springs are connected with the second clamp opening mechanism, the elastic force of the springs can drive the second clamp opening mechanism to clamp and fix the top cover, and when the battery cell and the top cover are fixed, the springs are in a compressed state;
the first clamp opening mechanism comprises a plurality of clamping mechanisms and a plurality of connecting rod mechanisms, the clamping mechanisms are slidably mounted on the base, and the springs are connected with part of the clamping mechanisms;
the clamping mechanism comprises a guide block, a guide rail and a clamping block for abutting against the battery core, the guide rail is mounted at the bottom end of the base, the clamping block is slidably mounted on the guide rail, one end of the guide block is connected with the clamping block, the other end of the guide block is connected with the spring, and two ends of the connecting rod mechanism are respectively connected with two opposite clamping blocks;
the second clamp opening mechanism comprises a short side positioning mechanism for positioning the end part of the short side of the top cover and a long side positioning mechanism for positioning the end part of the long side of the top cover;
the short edge positioning mechanism comprises a first top cover positioning block, a first driving block, a first sliding rail and a connecting piece, the first top cover positioning block is installed on the first driving block, the first driving block is installed on the first sliding rail in a sliding mode, the first sliding rail is installed on the base, one end of the spring is fixed on the base, and the other end of the spring is connected with the first driving block through the connecting piece;
the long-edge positioning mechanism comprises a driving rod, a connecting rod and two abutting mechanisms arranged at intervals, the abutting mechanisms can be slidably mounted on the base, two ends of the connecting rod are respectively connected with the two abutting mechanisms, and one end of the spring is connected to one of the abutting mechanisms through the driving rod.
2. The welding and positioning fixture for the flexible connection of the power battery as claimed in claim 1, wherein the base has two cell placing parts, and the clamping mechanisms are disposed around the cell placing parts.
3. The power battery flexible connection welding positioning fixture as claimed in claim 2, wherein the linkage mechanism comprises a rotating seat, a driving rotating seat, a first connecting rod and a second connecting rod;
the swivel mount install in on the base, the drive swivel mount can install on the swivel mount rotatoryly, the one end of first connecting rod can connect in one turnedly press from both sides tight piece, the other end of first connecting rod can connect in rotatoryly the one end of drive swivel mount, the one end of second connecting rod can connect in rotatoryly the other end of drive swivel mount, the other end of second connecting rod connect in another press from both sides tight piece.
4. The power battery flexible connection welding positioning fixture as claimed in claim 3, wherein the rotating base comprises a central shaft and a bearing, the central shaft is fixed on the base, an inner ring of the bearing is mounted on the central shaft, and a center of the driving rotating base is sleeved on an outer ring of the bearing.
5. The power battery flexible connection welding positioning fixture as claimed in any one of claims 1 to 4, wherein a base for placing a top cover is fixed in the middle of the base, a baffle for the top cover to abut against is fixedly arranged on one side of the long side of the base, a top cover stop block is arranged on the base, and the top cover stop block is positioned on one side of the short side of the base.
6. The welding and positioning fixture for the flexible connection of the power battery as claimed in claim 5, wherein the abutting mechanism comprises a second top cover positioning block, a second driving block and a second slide rail, the connecting rod is connected to the second top cover positioning block, the second top cover positioning block is mounted on the second driving block, the second driving block is slidably mounted on the second slide rail, the second slide rail is mounted on the base, and one end of the spring is connected to the second driving block through the driving rod.
7. The welding and positioning fixture for the flexible connection of the power battery as claimed in claim 6, wherein the baffle, the top cover stop, the first top cover positioning block and the second top cover positioning block are all insulating pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811575719.2A CN109551125B (en) | 2018-12-22 | 2018-12-22 | Power battery flexible coupling welding position anchor clamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811575719.2A CN109551125B (en) | 2018-12-22 | 2018-12-22 | Power battery flexible coupling welding position anchor clamps |
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| Publication Number | Publication Date |
|---|---|
| CN109551125A CN109551125A (en) | 2019-04-02 |
| CN109551125B true CN109551125B (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811575719.2A Active CN109551125B (en) | 2018-12-22 | 2018-12-22 | Power battery flexible coupling welding position anchor clamps |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110561012A (en) * | 2019-09-30 | 2019-12-13 | 广东利元亨智能装备股份有限公司 | positioning device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201086179Y (en) * | 2007-09-26 | 2008-07-16 | 深圳市比克电池有限公司 | Spot welding fixture equipment for cover plate |
| CN204893282U (en) * | 2015-07-28 | 2015-12-23 | 惠州市德瑞达科技股份有限公司 | Laser welding anchor clamps of electricity core and protection shield |
| CN105729021B (en) * | 2016-04-08 | 2017-12-05 | 深圳吉阳智云科技有限公司 | A kind of battery core cover plate welds detent mechanism |
| CN205989145U (en) * | 2016-07-27 | 2017-03-01 | 中航锂电（洛阳）有限公司 | A kind of lithium battery supersonic welding welding fixture |
| CN206277083U (en) * | 2016-12-22 | 2017-06-27 | 枣庄亿新电子科技有限公司 | Lithium battery cover plate ultra-sonic welded frock |
| CN206388795U (en) * | 2017-01-04 | 2017-08-08 | 深圳吉阳智能科技有限公司 | Fixture for assembling battery core and cover plate |
| CN207656105U (en) * | 2017-11-30 | 2018-07-27 | 中航锂电（洛阳）有限公司 | A kind of lithium battery fixture for laser welding |
| CN207616181U (en) * | 2017-12-06 | 2018-07-17 | 天津市久华新瑞科技有限公司 | High-precision mold processing milling machine |
| CN108620797A (en) * | 2018-07-16 | 2018-10-09 | 合肥国轩高科动力能源有限公司 | A kind of rectangular lithium ion battery ear-pole welding fixture |
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2018
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Effective date of registration: 20220818 Address after: 518000 workshop 501, building 3, intelligent manufacturing center park, No. 12, Chongqing Road, Heping community, Fuhai street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Han's lithium battery intelligent equipment Co.,Ltd. Address before: 518000 No. 9988 Shennan Road, Nanshan District, Shenzhen, Guangdong Patentee before: HAN'S LASER TECHNOLOGY INDUSTRY GROUP Co.,Ltd. |
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