CN212398396U - Lithium ion battery welding protection device - Google Patents
Lithium ion battery welding protection device Download PDFInfo
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- CN212398396U CN212398396U CN202021680676.7U CN202021680676U CN212398396U CN 212398396 U CN212398396 U CN 212398396U CN 202021680676 U CN202021680676 U CN 202021680676U CN 212398396 U CN212398396 U CN 212398396U
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- lithium ion
- ion battery
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model relates to a lithium ion battery welding encapsulation technical field specifically provides a lithium ion battery welding protection device. The lithium ion battery welding protection device comprises a protection main body and a positioning block; the protective body at least comprises a lower surface, an upper surface and a first side surface, wherein the first side surface is a surface with the height of the upper and lower surfaces and is intersected with the lower surface and the upper surface; the lower surface is at least provided with a pole protection groove and an explosion-proof valve shielding groove, the pole protection groove is used for covering a pole of the lithium ion battery to be welded, and the explosion-proof valve is used for covering the explosion-proof valve of the lithium ion battery to be welded; the positioning block is fixed on the upper surface; the first side face is at least provided with a welding lead avoiding position for leading out a welding lead. The utility model discloses can prevent effectively that laser edge sealing from welding the damage to utmost point post plastic part, notes liquid hole, explosion-proof valve etc..
Description
Technical Field
The utility model relates to a lithium ion battery welding encapsulation technical field, in particular to lithium ion battery welding protection device.
Background
In the processing and manufacturing process of the existing lithium ion battery, the firm connection between the battery parts is often required to be realized through laser welding, and the parts which are frequently required to be subjected to laser welding comprise an explosion-proof valve, a pole column, a flexible connection, a shell seal (also called side seal or edge seal), a liquid injection hole, a module and the like.
For a square lithium ion battery, if the distance between the pole plastic part and the welding line in the designed product is smaller, laser is easy to burn or even burn the pole plastic part in the process of welding the shell seal; meanwhile, welding spatter can fall into a liquid injection hole, a burn explosion-proof valve and the like.
At present, no effective means is available for solving the above problems easily occurring in the laser welding of the square lithium ion battery.
SUMMERY OF THE UTILITY MODEL
The utility model provides a lithium ion battery welding protection device aims at solving the easy burn of laser, burning out utmost point post plastic part, explosion-proof valve that current lithium ion battery exists at laser welding packaging process, and the welding splash easily falls into annotates liquid hole scheduling problem simultaneously.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a lithium ion battery welding protection device comprises a protection main body and a positioning block; wherein the content of the first and second substances,
the protective main body at least comprises a lower surface, an upper surface and a first side surface, wherein the first side surface is a surface with the height of the upper and lower surfaces and is intersected with the lower surface and the upper surface;
the lower surface is at least provided with a pole protection groove and an explosion-proof valve shielding groove, the pole protection groove is used for covering a pole of the lithium ion battery to be welded, and the explosion-proof valve is used for covering the explosion-proof valve of the lithium ion battery to be welded;
the positioning block is fixed on the upper surface;
the first side face is at least provided with a welding lead avoiding position for leading out a welding lead.
Preferably, the edge of the upper surface of the protective body has a stepped structure.
Preferably, the lower surface is provided with two pole protection grooves, and the pole protection grooves are positioned at two sides of the explosion-proof valve shielding groove.
Preferably, the positioning block is a magnetic positioning block.
Preferably, the protective body is any one of a titanium-zirconium-molybdenum alloy block, a stainless steel block and a brass block.
Preferably, the fixing mode of the positioning block and the protection main body comprises at least one of welding and riveting.
Preferably, the protection main body further comprises a limiting hole, and the limiting hole is located on the upper surface of the protection main body.
Preferably, the first side surface of the protective body has a regular or irregular gear-like structure, or a regular or irregular sawtooth-like structure.
Preferably, the depth of the pole protection groove is equivalent to the exposed height of a pole of the lithium ion battery to be welded on the top cover; the diameter of the pole protection groove is equivalent to that of a pole of the lithium ion battery to be welded.
Preferably, the explosion-proof valve shielding groove is also covered on a liquid injection hole of the lithium ion battery to be welded.
The utility model has the advantages of:
compared with the prior art, the utility model provides a lithium ion battery welding protection device, through the utmost point post protection groove of seting up, explosion-proof valve covers the groove, welding lead wire keeps away the empty position and has realized the protection of laser edge sealing welding in-process antipole post plastic part, explosion-proof valve, notes liquid hole, can effectively prevent laser antipole post plastic part, the burn of explosion-proof valve or burn out, effectively prevented simultaneously that laser welding splash from falling into explosion-proof valve, annotate in the liquid hole, thereby can effectively reduce the laser edge sealing welded rejection rate, and improve production efficiency.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings required to be used in the embodiments are briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. Furthermore, these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Wherein:
fig. 1 is a schematic perspective view of the welding protection device for lithium ion batteries according to the present invention;
fig. 2 is a schematic top view of the welding protection device for lithium ion battery shown in fig. 1 according to the present invention;
fig. 3 is another schematic perspective view of the welding protection device for lithium ion battery of the present invention;
fig. 4 is a schematic top view of the welding protection device for lithium ion battery shown in fig. 3 according to the present invention;
FIG. 5 is a schematic perspective view of the lithium ion battery welding protection device of the present invention installed on the surface of the top cover of the lithium ion battery to be welded;
fig. 6 is a schematic top view illustrating the lithium ion battery welding protection device shown in fig. 5 according to the present invention mounted on the surface of the lithium ion battery top cover to be welded;
wherein the content of the first and second substances,
1-a weld protection device;
11-protection body, 11A-lower surface, 11B-upper surface, 11C-first side surface, 111-positioning block fixing groove, 112-pole protection groove, 113-explosion-proof valve shielding groove, 114-welding lead vacancy avoidance position, 115-step structure, 116-limiting hole;
12-a positioning block, 121-a positioning block welding lead vacancy avoidance position and 122-a positioning block fixing hole;
2-lithium ion battery, 20-battery case, 21-top cover.
Detailed Description
For making the utility model discloses an utility model purpose, technical scheme and advantage more clear, combine below the utility model discloses the drawing of embodiment, right the technical scheme of the utility model discloses embodiment carries out clear, complete description.
It is to be understood that the embodiments described are only some of the disclosed embodiments of the invention, and not all of them. Based on the described embodiments, other embodiments obtained by persons of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. As used herein, the terms "first," "second," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.
When an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly disposed on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solutions.
Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The meaning of "plurality" is two or more unless specifically limited otherwise. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
Referring to fig. 1 and 2, the welding protection device 1 for a lithium ion battery provided by the present invention is mainly used for protecting a lithium ion battery post, a post assembly, an explosion-proof valve, etc. during the edge sealing welding of the lithium ion battery.
The lithium ion battery welding protection device 1 comprises a protection main body 11 and a positioning block 12.
The protection main body 11 at least comprises a lower surface 11A, an upper surface 11B and a first side surface 11C, wherein the first side surface 11C is a surface with the height of up and down and is intersected with the lower surface 11A and the upper surface 11B;
the protection body 11 is provided with at least a post protection groove 112, an explosion-proof valve shield groove 113 and a welding lead avoiding space 114, the post protection groove 112 and the explosion-proof valve shield groove 113 are located on the lower surface 11A, and the welding lead avoiding space 114 is located on the first side surface 11C.
In some embodiments, two pole protection grooves 112 are opened on the lower surface 11A, and the pole protection grooves 112 are located on both sides of the explosion-proof valve shield groove 113.
The above-mentioned terminal protection groove 112 should be able to store the terminal of the lithium ion battery to be welded, meanwhile, the explosion-proof valve protection groove 113 can cover the explosion-proof valve on the top cover of the lithium ion battery to be welded, and the whole lithium ion battery welding protection device 1 can also completely cover the liquid injection hole on the top cover of the lithium ion battery to be welded. In some embodiments, the explosion-proof valve shielding groove 113 covers the liquid injection hole on the top cover of the lithium ion battery.
In some embodiments, the post protection groove 112 and the explosion-proof valve shielding groove 113 may be communicated, and the post protection groove 112 and the explosion-proof valve shielding groove 113, which are communicated with each other, may form a larger enclosed space when being fastened to the top cover of the lithium ion battery to be welded, so as to prevent the air in the enclosed space from being heated rapidly but not discharged rapidly due to too narrow air.
In some embodiments, the depth of the post protection groove 112 is equal to the exposed height of the post of the lithium ion battery to be welded on the top cover, so as to prevent the lithium ion battery welding protection device 1 from being supported by the exposed post on the top cover and being unable to be completely attached to the exposed surface of the top cover, and if the welding protection device is unable to be completely attached to the exposed surface of the top cover, laser enters along the gap during laser edge sealing welding, and may damage the post and the post plastic component. Of course, the depth of the post protection groove 112 may be higher than the exposed height of the lithium ion battery post to be laser welded on the top cover.
In some embodiments, the diameter of the post protection groove 112 is equal to the diameter of the lithium ion battery post to be laser welded, and when the inner wall of the post protection groove 112 and the side wall of the lithium ion battery post to be laser welded contact with each other, the heat generated in the laser welding process can be timely dissipated, so that the problem that the heat absorbed by the lithium ion battery post cannot be timely dissipated is avoided.
The welding lead avoiding space 114 is formed in the first side surface 11C of the protection body 11, and a space is reserved for the welding lead, so that the welding lead of the lithium ion battery to be welded can be conveniently led out from the edge of the top cover of the lithium ion battery to be welded, and meanwhile, welding can be conveniently carried out.
In some embodiments, the solder wire clearance space 114 may be one or two or more. When the number of the welding lead avoiding holes 114 is one, the welding lead avoiding holes are suitable for welding the cylindrical lithium ion battery, and when the number of the welding lead avoiding holes 114 is two or more, the welding lead avoiding holes can be symmetrically arranged on the surface of the protection main body 11 in the height direction, so that the welding lead can be smoothly led out from the welding lead avoiding holes 114 no matter how to grab the lithium ion battery welding protection device, and the welding lead avoiding holes are suitable for the square lithium ion battery. At this time, the protection main body 11 further includes a second side surface (not shown in the drawing), the second side surface and the first side surface 11C are symmetrically distributed on the protection main body 11, and the second side surface is provided with a second bonding wire clearance space.
Foretell protection main part 11 is the block that has certain thickness, hardness, mechanical strength, can effectual protection utmost point post plastic part, annotate liquid hole and explosion-proof valve to have the performance of reflection heat and heat conduction, be convenient for reflection laser and the heat that produces of conduction laser welding in-process.
In some embodiments, the material of the protection body 11 is any one of titanium-zirconium-molybdenum alloy, stainless steel, and brass. The materials have good reflectivity and heat conductivity coefficient, and are convenient for quickly conducting heat. Namely any one of a titanium-zirconium-molybdenum alloy block, a stainless steel block and a brass block at the 11-position of the protective main body.
The titanium-zirconium-molybdenum alloy has a thermal conductivity coefficient of 126W/(m.K), has a more excellent thermal conductivity effect, can dissipate heat in time, and is preferably the protective main body 11 made of the titanium-zirconium-molybdenum alloy, namely the protective main body 11 is a titanium-zirconium-molybdenum alloy block.
In order to increase the heat dissipation area and speed up the heat dissipation process, in some embodiments, the first side 11C (and the second side, if any) of the protection body 11 has a regular or irregular gear-like structure, or a regular or irregular sawtooth-like structure, or a wave-shaped curved surface.
The positioning block 12 is fixed on the upper surface 11B of the protection main body 11, the positioning block 12 is used for being conveniently grabbed by a manipulator or an operator, and meanwhile, the lithium ion battery welding protection device 1 can be fixed on the surface of a top cover of a lithium ion battery to be welded, so that the lithium ion battery welding protection device 1 is prevented from moving in the working process to influence the welding process.
In some embodiments, the positioning block 12 has a magnetic function, i.e., is a magnetic positioning block, which is convenient for a manipulator or an operator to grasp and fix, and prevents production accidents caused by falling during operation.
In some embodiments, the upper surface 11B of the protection body 11 is provided with a positioning block fixing groove 111, so as to facilitate the fixing of the positioning block 12 on the protection body 11.
In some embodiments, a positioning block welding lead avoiding space 121 is formed on the surface of the positioning block 12 in the height direction, and the position of the positioning block welding lead avoiding space 121 is spatially matched with the position of the welding lead avoiding space 114 on the protection main body 11, so as to facilitate leading out of the welding lead.
In some embodiments, the positioning block 12 is fixed to the protection body 11 by welding or riveting.
If the positioning block 12 is fixed on the upper surface 11B of the welding protection device 11 by riveting, the positioning block 12 is provided with a positioning block fixing hole 122, and the protection body 11 is provided with a matching riveting hole (not shown), and the positioning block 12 is fixed on the welding protection device 11 by a rivet during use.
Referring to fig. 3 and 4, in some embodiments, in order to facilitate laser edge sealing welding, the protection main body 11 of the lithium ion battery welding protection device of the present invention is provided with a step structure 115 for facilitating laser welding. The step structure 115 is provided at the edge of the upper surface 11B of the protection main body 11, that is, at the edge of the surface of the protection main body 11 facing away from the lithium ion battery top cover when the protection main body 11 is fastened to the lithium ion battery top cover, and the number of the steps of the step structure 115 may be one or several.
Referring to fig. 2, 4, 5, and 6, in some embodiments, in order to avoid the welding efficiency and even the welding effect being affected by the displacement of the lithium ion battery welding protection device during the welding process, a plurality of limiting holes 116 are formed in the protection main body 11, and the limiting holes 116 are mainly inserted and positioned by a manipulator, so that the lithium ion battery welding protection device 1 is fixed on the surface of the top cover of the lithium ion battery to be welded, and the displacement during the working process is avoided. The stopper hole 116 may be a through hole or a non-through hole in the protective body 11.
Use the utility model discloses a during lithium ion battery welding protection device 1, only need manipulator or manual operation to detain lithium ion battery welding protection device on treating welded lithium ion battery top cap, fix and can carry out laser edge sealing welding.
The specific working process can be seen in fig. 4, 5 and 6.
In fig. 5 and 6, a rectangular lithium ion battery of hev6.2ah (where HEV denotes a certain battery model in an enterprise) will be described as an example.
This square lithium ion battery top cap design size width is (11 +/-0.5) mm, and utmost point post design size is (8.3 +/-0.1) mm, and the average reservation size in both sides is 1.35mm, and the interval undersize between utmost point post plastic part and the welding seam is when carrying out laser edge sealing welding, and laser burns out utmost point post plastic part easily even, leads to the product defective rate to increase.
When carrying out laser edge sealing welding to the square lithium ion battery of this model, provide welding protection device 1, this welding protection device 1 is including protection main part 11 and the locating piece 12 of riveting on protection main part 11 upper surface 11B, the material of protection main part 11 is titanium zirconium molybdenum alloy, the material of locating piece 12 is magnet, two utmost point post protection groove 112 have been seted up to the lower surface of welding protection main part 11, explosion-proof valve shields groove 113, and utmost point post protection groove 112 distributes in explosion-proof valve shields groove 113's both sides, this protection main part 11 still has first side 11C and second side (the figure does not mark), all seted up welding lead on first side 11C and second side and kept away vacancy 114.
Sucking a positioning block 12 of the lithium ion battery welding protection device 1 illustrated in fig. 4 by a manipulator and buckling the positioning block on a top cover 21 of an HEV6.2Ah square lithium ion battery 2 to be welded, ensuring that an exposed pole of the HEV6.2Ah square lithium ion battery top cover 21 to be welded is matched with a pole protection groove 112 of the lithium ion battery welding protection device 1, ensuring that an explosion-proof valve and a liquid injection hole are completely covered by an explosion-proof valve protection groove 113 of the lithium ion battery welding protection device 1, fixing the lithium ion battery welding protection device 1 on the battery top cover 21 through a limiting hole 116, ensuring that a part to be welded of the lithium ion battery top cover 21 to be welded and a part to be welded of a lithium ion battery shell 20 to be welded are exposed, and particularly, as shown in fig. 5 and 6, and leading out a welding lead from a vacancy avoiding position 114 (121); and then starting the laser welding equipment to perform laser welding, and taking the lithium ion battery welding protection device 1 away by the manipulator after the laser welding is finished.
Through the protection of lithium ion battery welding protection device 1, when carrying out HEV6.2Ah square lithium ion battery laser edge sealing welding, can effectually stop the welding splash and fall into on annotating liquid hole and explosion-proof valve, simultaneously can effectually avoid the heat burn that the laser welding in-process produced to burn or even burn out utmost point post plastic part.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.
Claims (10)
1. The lithium ion battery welding protection device is characterized by comprising a protection main body and a positioning block; wherein the content of the first and second substances,
the protective main body at least comprises a lower surface, an upper surface and a first side surface, wherein the first side surface is a surface with the height of the upper and lower surfaces and is intersected with the lower surface and the upper surface;
the lower surface is at least provided with a pole protection groove and an explosion-proof valve shielding groove, the pole protection groove is used for covering a pole of the lithium ion battery to be welded, and the explosion-proof valve is used for covering the explosion-proof valve of the lithium ion battery to be welded;
the positioning block is fixed on the upper surface;
the first side face is at least provided with a welding lead avoiding position for leading out a welding lead.
2. The lithium ion battery welding protection device of claim 1, wherein an edge of the upper surface of the protection body has a step structure.
3. The welding protection device for the lithium ion battery according to claim 1, wherein the lower surface is provided with two pole protection grooves, and the pole protection grooves are positioned on two sides of the explosion-proof valve shielding groove.
4. The lithium ion battery welding protection device of claim 1 or 2, wherein the locating block is a magnetic locating block.
5. The lithium ion battery welding protection device of claim 1, wherein the protection body is any one of a titanium-zirconium-molybdenum alloy block, a stainless steel block, and a brass block.
6. The welding protection device for the lithium ion battery according to any one of claims 1 to 3, wherein the fixing manner of the positioning block and the protection body comprises at least one of welding and riveting.
7. The lithium ion battery welding protection device of claim 1, wherein the protection body further comprises a limiting hole, and the limiting hole is located on an upper surface of the protection body.
8. The lithium ion battery welding protection device of claim 1, wherein the first side of the protection body is in a regular or irregular gear-like structure, or a regular or irregular saw-tooth structure.
9. The welding protection device for the lithium ion battery according to claim 1, wherein the depth of the pole protection groove is equivalent to the exposed height of a pole of the lithium ion battery to be welded on the top cover; the diameter of the pole protection groove is equivalent to that of a pole of the lithium ion battery to be welded.
10. The welding protection device for the lithium ion battery as claimed in claim 1, wherein the explosion-proof valve shielding groove is also covered on a liquid injection hole of the lithium ion battery to be welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021680676.7U CN212398396U (en) | 2020-08-11 | 2020-08-11 | Lithium ion battery welding protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021680676.7U CN212398396U (en) | 2020-08-11 | 2020-08-11 | Lithium ion battery welding protection device |
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| CN212398396U true CN212398396U (en) | 2021-01-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111975152A (en) * | 2020-08-11 | 2020-11-24 | 欣旺达电动汽车电池有限公司 | Lithium ion battery welding protection device |
| CN113751869A (en) * | 2021-09-09 | 2021-12-07 | 芜湖天弋能源科技有限公司 | Tool and method for removing heat conduction in lithium ion battery laser welding |
| CN115377575A (en) * | 2022-09-28 | 2022-11-22 | 厦门海辰储能科技股份有限公司 | End cover assembly for single battery, battery pack and electric device |
| CN115425345A (en) * | 2022-09-28 | 2022-12-02 | 厦门海辰储能科技股份有限公司 | End cover assembly for single battery and single battery |
-
2020
- 2020-08-11 CN CN202021680676.7U patent/CN212398396U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111975152A (en) * | 2020-08-11 | 2020-11-24 | 欣旺达电动汽车电池有限公司 | Lithium ion battery welding protection device |
| CN113751869A (en) * | 2021-09-09 | 2021-12-07 | 芜湖天弋能源科技有限公司 | Tool and method for removing heat conduction in lithium ion battery laser welding |
| CN113751869B (en) * | 2021-09-09 | 2023-08-29 | 芜湖天弋能源科技有限公司 | Method for removing heat conduction in laser welding of lithium ion battery |
| CN115377575A (en) * | 2022-09-28 | 2022-11-22 | 厦门海辰储能科技股份有限公司 | End cover assembly for single battery, battery pack and electric device |
| CN115425345A (en) * | 2022-09-28 | 2022-12-02 | 厦门海辰储能科技股份有限公司 | End cover assembly for single battery and single battery |
| CN115425345B (en) * | 2022-09-28 | 2023-10-17 | 厦门海辰储能科技股份有限公司 | End cover assembly for single battery and single battery |
| CN115377575B (en) * | 2022-09-28 | 2023-10-17 | 厦门海辰储能科技股份有限公司 | End cover assembly for single battery, battery pack and power utilization device |
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Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518107 Xinwangda Industrial Park, No.18, Tangjia south, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |