CN111668400A - Power battery cover plate - Google Patents
Power battery cover plate Download PDFInfo
- Publication number
- CN111668400A CN111668400A CN202010372020.7A CN202010372020A CN111668400A CN 111668400 A CN111668400 A CN 111668400A CN 202010372020 A CN202010372020 A CN 202010372020A CN 111668400 A CN111668400 A CN 111668400A
- Authority
- CN
- China
- Prior art keywords
- bottom wall
- cover plate
- power battery
- electrode
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001681 protective effect Effects 0.000 claims abstract description 19
- 230000005611 electricity Effects 0.000 claims abstract description 3
- 239000012634 fragment Substances 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 2
- 230000010354 integration Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 5
- 238000004880 explosion Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
A power battery cover plate comprises a cover plate body, a first electrode and a second electrode, wherein the first electrode and the second electrode are arranged on the cover plate body, the cover plate body is provided with a groove for mounting the first electrode, the first electrode comprises a protective elastic sheet, part of the protective elastic sheet is in electric contact with the bottom wall of the groove, a cover cap and a pressing sheet, the cover cap and the protective elastic sheet are fixed into a whole, the pressing sheet is used for fixing the cover cap and the protective elastic sheet on the cover plate body, when the internal pressure of a battery is increased to a preset value, the part of the bottom wall in electric contact with the protective elastic sheet is broken and impacts the protective elastic sheet upwards, the protective elastic sheet is turned over and disconnected from the electric connection with the cover plate body; this application power battery apron through with explosion-proof function integration on first electrode, cut off the electricity of electrode earlier when pressure increases and connect, explosion-proof performance is better.
Description
Technical Field
The application relates to the field of power battery components, in particular to a power battery cover plate.
Background
Lithium batteries are widely used in various industries, 3C electronics, new energy vehicles, etc., and have great safety problems, such as fire, explosion, etc., due to their own characteristics. Particularly in the field of electric automobiles, batteries are used as key components of power output, and are concerned with the safety of vehicles and the life safety of people. The power battery cover plate is used as a core component of the battery pack, and the reliability of the power battery cover plate has great influence on the normal use of the automobile.
The cover plate of a general lithium ion power battery comprises a cover plate body, a tab, a liquid injection assembly, an explosion-proof device and the like, wherein the explosion-proof device is independently arranged on the cover plate body to release pressure when the internal pressure of the battery is greatly increased, but the cutting-off of the positive electrode and the negative electrode cannot be completed during the pressure release, and a larger explosion risk still exists.
Disclosure of Invention
In view of this, it is necessary to provide a power battery cover plate, in which an explosion-proof device is directly used as one electrode, and when the internal pressure of the battery is greatly increased, pressure relief is implemented and the connection between the positive electrode and the negative electrode is cut off, so as to further reduce the safety risk.
For solving above-mentioned technical problem, the application provides a power battery apron, include the apron body, locate first electrode and second electrode on the apron body, the apron body is equipped with the installation the recess of first electrode, first electrode include the part with the protection shell fragment of recess diapire electrical contact, with the fixed block and the fixing of protection shell fragment as an organic whole the block with the protection shell fragment in preforming on the apron body, when battery internal pressure increases to the predetermined value, with the part diapire fracture of protection shell fragment electrical contact makes upwards the protection shell fragment makes protection shell fragment upset disconnection with the electricity of apron body is connected, afterwards the protection shell fragment fracture under pressure and pass through the pressure release block.
Preferably, the protection elastic sheet comprises an edge part located above the cover plate body, an elastic part formed by extending from the edge part towards the bottom wall of the groove, and a central part located at the lower end of the elastic part and electrically connected with the bottom wall of the groove.
Preferably, the cap comprises a top cover, a cylinder wall formed by bending downwards from the outer periphery of the top cover, and an end part formed by bending from the lower end of the cylinder wall along the radial outer periphery.
Preferably, the edge part and the end part are welded together after being overlapped in the vertical direction, the upper side and the lower side of the end part and the edge part are respectively provided with an insulating gasket, the insulating gasket on the upper side is clamped between the pressing sheet and the end part, and the insulating gasket on the lower side is clamped between the edge part and the upper surface of the cover plate body.
Preferably, the cylinder wall is provided with at least one opening, and the number of the openings is preferably 2-5.
Preferably, the pressing sheet includes a press-contact portion press-contacted above the upper insulating washer, a bent portion bent downward from the press-contact portion, and a welding portion welded on the upper surface of the cover plate body and bent radially and peripherally from the bottom of the bent portion.
Preferably, the insulating washer is of a U-shaped structure, and the end part and the edge part are overlapped and fixed and then sleeved in the U-shaped space.
Preferably, the elastic part of the protection elastic sheet is provided with a circle of annular groove on the outer surface of one side close to the edge part, so that the elastic part is easier to break, and the thickness of the elastic part is gradually thickened from the edge part to the central part.
Preferably, the groove comprises a side wall formed by downwards stretching the cover plate body and a bottom wall located at the bottom of the side wall, the bottom wall comprises a first bottom wall located on the radial outer side and a pre-breaking bottom wall located at the center of the bottom wall, the central portion and the pre-breaking bottom wall are welded and fixed together, and a pre-breaking groove is formed in the lower surface between the pre-breaking bottom wall and the first bottom wall.
Preferably, a second bottom wall and a connecting wall are respectively arranged between the first bottom wall and the pre-breaking bottom wall, the thickness of the first bottom wall is larger than that of the second bottom wall, the thickness of the second bottom wall is larger than that of the pre-breaking bottom wall, the thickness of the pre-breaking bottom wall is larger than that of the connecting wall, and the pre-breaking groove is formed in the lower surface of the connecting wall.
The power battery cover plate integrates an explosion-proof function on the first electrode, when a set pressure value is reached, the cover plate body electrically connected with the protection elastic sheet is broken to cut off the electric connection of the first electrode, and then the broken contact sealing state of the protection elastic sheet enables pressure to be removed from the opening of the cover cap.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a cross-sectional view of a power cell cover plate assembly of the present application;
fig. 2 is a cross-sectional view of a first electrode of a power cell cover plate of the present application and a partial enlarged view thereof.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1 and 2, a power battery cover plate of the present application includes a cover plate body 10, a first electrode a and a second electrode 20 assembled on the cover plate body 10, and a liquid injection hole 12 formed on the cover plate body 10.
The cap body 10 is provided with a mounting hole 11 for mounting the second electrode 20. The cover plate body 10 is further provided with a groove 13 for mounting the first electrode A, the groove 13 comprises a bottom wall 14 and a side wall 15 for connecting the bottom wall 14 with the cover plate body 10, the groove 13 is of a cylindrical structure, and the bottom wall 14 is of an integral seamless structure. The bottom wall 14 includes a first bottom wall 141 connected to the side wall 15 at a radially outer side, a second bottom wall 142 integrally connected to the first bottom wall 141 and located at a radially inner side of the first bottom wall 141, a pre-cut bottom wall 143 located at a center of the groove 13, and a connecting wall 144 connecting the second bottom wall 142 and the pre-cut bottom wall 143. The thickness of the first bottom wall 141 is greater than that of the second bottom wall 142, the thickness of the second bottom wall 142 is greater than that of the pre-cut bottom wall 143, and the thickness of the pre-cut bottom wall 143 is greater than that of the connecting wall 144. The connecting wall 144 is a circular ring structure and has a ring of pre-breaking grooves 145 formed at the bottom thereof.
The first electrode B includes a protective elastic sheet 40 electrically contacting the pre-cut bottom wall 143, a cap 30 covering the protective elastic sheet 40, an insulating washer 50 covering the protective elastic sheet 40 and the cap 30 along the radial periphery, and a pressing sheet 60 fixing the cap 30 and the protective elastic sheet 40 along the radial outer edge on the cover body 10 through the insulating washer 50.
The insulating gasket 50 is of a U-shaped structure, and the protective elastic sheet 40 includes an edge portion 41 located above the cover plate body 10 at the periphery of the groove 13, an elastic portion 42 formed by extending from the edge portion 41 to the bottom wall 14, and a central portion 43 formed in the middle of the elastic portion 42 and welded and fixed with the upper surface of the pre-cut bottom wall 143. The outer diameter of the central portion 43 is smaller than that of the pre-cut bottom wall 143, the elastic portion 42 connects the central portion 43 and the edge portion 41, and the thickness of the elastic portion 42 is gradually reduced from the central portion 43 toward the edge portion 41. The elastic portion 42 is provided with a ring-shaped annular groove 421 on the outer surface of the end close to the edge portion 41. The edge portion 41 is parallel to the center portion 43.
The cap 30 includes a top cover 31, a cylinder wall 32, an end portion 33 extending from the outer circumference of the cylinder wall 32 in a radial direction, and a plurality of openings 34 formed in the cylinder wall 32. The end portion 33 of the cap 30 and the edge portion 41 of the protective elastic sheet 40 are vertically overlapped and fixed together, and may be welded and fixed together and electrically connected. The end portion 33 and the edge portion 41 are overlapped and then sleeved in the U-shaped space of the insulating gasket 50.
The pressing piece 60 includes a press-contact portion 61 press-contacted to the upper side of the insulating washer 50, a bent portion 62 bent downward from the press-contact portion 61, and a welding portion 63 bent outward in the radial direction from the bottom end of the bent portion 62. The U-shaped wall on the lower side of the insulating washer 50 is sandwiched between the edge 41 and the upper surface of the cover body 10, and the U-shaped wall on the upper side of the insulating washer 50 is sandwiched between the crimping part 61 and the end part 33. The welding portion 63 is welded and fixed on the upper surface of the cover body 10, and the press-fit portion 61 presses the insulating washer 50, so that the protective elastic sheet 40 is electrically connected with the cap 30 as a whole and is electrically contacted with the pre-cut bottom wall 143 of the cover body 10 only through the central portion 43, and the edge portion 41 and the end portion 33 are electrically isolated from the pressing sheet 60 and the cover body 10 through the insulating washer 50.
The second electrode 20 includes an electrode post 21, a riveting block 22, a sealing ring 23 and an insulating gasket 24, the electrode post 21 includes a cylinder 212 passing through the mounting hole 11 and a head 211 located at the bottom of the cylinder 212 and below the cover plate body 10, and the sealing ring 23 is clamped between the head 211 and the bottom surface of the cover plate body 10. The riveting block 22 is riveted on the upper end of the column 212 and is located on the upper surface of the cover plate body 10, and the insulating gasket 24 is clamped between the riveting block 212 and the cover plate body 10. That is, the pole 21 and the riveting block 22 are not in electrical contact with the cover plate body 10 and are sealed by the sealing ring 23.
The explosion-proof working principle of the first electrode a of the present application will be described in detail as follows:
when the internal pressure of the power battery is increased to a certain preset value due to the occurrence of an abnormality inside the power battery, and the pressure value exceeds the bearing force of the pre-breaking bottom wall 143, the pre-breaking bottom wall 143 is broken from the pre-breaking groove 145, the electric connection of the first electrode A is cut off, and the pressure is prevented from further increasing; after the pre-breaking bottom wall 143 is broken, the pressure continues to push the protective elastic sheet 40 upwards to turn upwards and finally break the elastic part 42 from the annular groove 421, and finally the pressure is discharged through the opening 34 on the cap 30 to prevent explosion. The first electrode a is completely sealed below before the pre-cut bottom wall 143 is broken. The cap 30 can be connected to an external device as a pole of the first electrode a. The annular groove 421 formed on the elastic part 42 of the protective elastic sheet 40 and the pre-breaking groove 145 formed on the periphery of the pre-breaking bottom wall 143 of the cover plate body 10 can be set according to the required protective pressure, and the typical value of the borne protective pressure is 0.6-1.5 MPa.
The power battery cover plate integrates an explosion-proof function on the first electrode A, when a set pressure value is reached, the part of the cover plate body 10 electrically connected with the protection elastic sheet 40 is broken to cut off the electric connection of the first electrode, and then the pressure is removed from the opening 33 of the cover cap 30 through the broken contact sealing state of the protection elastic sheet 40.
The cover plate body 10, the cap 30 and the pressing sheet 60 are made of aluminum alloy or stainless steel metal materials; the insulating washer 50 is made of high polymer materials such as PP, PPS and PFA or fluororubber materials; the number of openings 34 in the cap 30 is preferably 2-5. The welding mode of the application is modes such as resistance welding, brazing or laser welding.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. The utility model provides a power battery apron, includes the apron body, locates first electrode and second electrode on the apron body, its characterized in that, the apron body is equipped with the recess of installation first electrode, first electrode include the part with the protection shell fragment of recess diapire electrical contact, with the fixed block as an organic whole of protection shell fragment and fixed the block with the protection shell fragment in preforming on the apron body, when battery internal pressure increases to the predetermined value, with the part diapire fracture of protection shell fragment electrical contact upwards impact the protection shell fragment and make protection shell fragment upset disconnection with the electricity of apron body is connected, afterwards the protection shell fragment fracture under pressure and pass through the block pressure release.
2. The cover plate for power battery of claim 1, wherein the protective elastic sheet comprises an edge portion located above the cover plate body, an elastic portion extending from the edge portion toward the bottom wall of the groove, and a central portion located at the lower end of the elastic portion and electrically connected to the bottom wall of the groove.
3. The power battery cover plate of claim 2, wherein the cap comprises a top cover, a cylindrical wall bent downward from the outer periphery of the top cover, and an end bent from the lower end of the cylindrical wall along the radial outer periphery.
4. The cover plate for a power battery as claimed in claim 3, wherein the edge and the end are welded together after being stacked in the vertical direction, the end and the edge are respectively provided with an insulating gasket at the upper and lower sides, the upper insulating gasket is clamped between the pressing sheet and the end, and the lower insulating gasket is clamped between the edge and the upper surface of the cover plate body.
5. The cover plate for power battery of claim 4, wherein the cylinder wall is provided with at least one opening, and the number of the openings is preferably 2-5.
6. The cover plate for a power battery as claimed in claim 5, wherein the pressing plate includes a press-contact portion press-contacted above the upper insulating washer, a bent portion bent downward from the press-contact portion, and a welding portion welded to the upper surface of the cover plate body and bent radially and peripherally from the bottom of the bent portion.
7. The cover plate for power battery as claimed in claim 6, wherein the insulating washer is a U-shaped structure, and the end portion is overlapped and fixed with the edge portion and then sleeved into the U-shaped space.
8. The cover plate for a power battery of claim 5, wherein the elastic part of the protection spring plate is provided with a ring of annular groove on the outer surface of one side close to the edge part, so that the elastic part is easier to break, and the thickness of the elastic part is gradually thickened from the edge part to the central part.
9. The power battery cover plate of claim 8, wherein the groove comprises a side wall formed by stretching the cover plate body downwards and a bottom wall located at the bottom of the side wall, the bottom wall comprises a first bottom wall located at the radial outer side and a pre-breaking bottom wall located at the center of the bottom wall, the center part and the pre-breaking bottom wall are welded and fixed together, and a pre-breaking groove is formed in the lower surface between the pre-breaking bottom wall and the first bottom wall.
10. The cover plate for the power battery as claimed in claim 8, wherein a second bottom wall and a connecting wall are respectively disposed between the first bottom wall and the pre-breaking bottom wall, the thickness of the first bottom wall is greater than that of the second bottom wall, the thickness of the second bottom wall is greater than that of the pre-breaking bottom wall, the thickness of the pre-breaking bottom wall is greater than that of the connecting wall, and the pre-breaking groove is disposed on a lower surface of the connecting wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010372020.7A CN111668400A (en) | 2020-05-06 | 2020-05-06 | Power battery cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010372020.7A CN111668400A (en) | 2020-05-06 | 2020-05-06 | Power battery cover plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111668400A true CN111668400A (en) | 2020-09-15 |
Family
ID=72383194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010372020.7A Pending CN111668400A (en) | 2020-05-06 | 2020-05-06 | Power battery cover plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111668400A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023050236A1 (en) * | 2021-09-29 | 2023-04-06 | 宁德时代新能源科技股份有限公司 | Pressure relief mechanism, battery cell, battery, electrical apparatus, and manufacturing method therefor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101626066A (en) * | 2009-08-14 | 2010-01-13 | 深圳市科达利实业有限公司 | Lithium battery cover plate with explosion and breakage preventing protection apparatus and production method thereof |
| CN201994356U (en) * | 2011-04-29 | 2011-09-28 | 惠州亿纬锂能股份有限公司 | Battery assembly cover cap |
| US20170373301A1 (en) * | 2016-06-27 | 2017-12-28 | Contemporary Amperex Technology Co .. Limited | Top Cover Of Power Battery And Power Battery |
| CN207233791U (en) * | 2017-08-30 | 2018-04-13 | 宁德时代新能源科技股份有限公司 | The cap assembly and secondary cell of secondary cell |
| CN208674176U (en) * | 2018-03-16 | 2019-03-29 | 比亚迪股份有限公司 | Battery cover board assembly, single battery, battery modules, power battery and electric car |
-
2020
- 2020-05-06 CN CN202010372020.7A patent/CN111668400A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101626066A (en) * | 2009-08-14 | 2010-01-13 | 深圳市科达利实业有限公司 | Lithium battery cover plate with explosion and breakage preventing protection apparatus and production method thereof |
| CN201994356U (en) * | 2011-04-29 | 2011-09-28 | 惠州亿纬锂能股份有限公司 | Battery assembly cover cap |
| US20170373301A1 (en) * | 2016-06-27 | 2017-12-28 | Contemporary Amperex Technology Co .. Limited | Top Cover Of Power Battery And Power Battery |
| CN207233791U (en) * | 2017-08-30 | 2018-04-13 | 宁德时代新能源科技股份有限公司 | The cap assembly and secondary cell of secondary cell |
| CN208674176U (en) * | 2018-03-16 | 2019-03-29 | 比亚迪股份有限公司 | Battery cover board assembly, single battery, battery modules, power battery and electric car |
Non-Patent Citations (1)
| Title |
|---|
| 肖浚仿: "《普通高等教育十三五汽车类规划教材 新能源汽车技术概论》", 湖北科学技术出版社, pages: 3 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023050236A1 (en) * | 2021-09-29 | 2023-04-06 | 宁德时代新能源科技股份有限公司 | Pressure relief mechanism, battery cell, battery, electrical apparatus, and manufacturing method therefor |
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Effective date of registration: 20210816 Address after: 518000 No.3 Factory, Qiaotou Fuqiao Industrial Zone, Fuyong Town, Bao'an District, Shenzhen City, Guangdong Province Applicant after: SHENZHEN EVERWIN PRECISION TECHNOLOGY Co.,Ltd. Address before: 518000 201, building A3, phase I plant, Fuqiao Third District, Xinhe community, Fuhai street, Bao'an District, Shenzhen City, Guangdong Province Applicant before: Shenzhen Changying Hydrogen Power Technology Co.,Ltd. Applicant before: SHENZHEN EVERWIN PRECISION TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20220610 Address after: 644000 No. 801-11, data center, No. 9, shaping section, Guoxing Avenue, Lingang Economic Development Zone, Yibin City, Sichuan Province Applicant after: Yibin Changying Precision Technology Co.,Ltd. Applicant after: Shenzhen Changying Precision Technology Co., Ltd Address before: 518000 No.3 Factory, Qiaotou Fuqiao Industrial Zone, Fuyong Town, Bao'an District, Shenzhen City, Guangdong Province Applicant before: SHENZHEN EVERWIN PRECISION TECHNOLOGY Co.,Ltd. |
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