CN203562463U - Energy storage device with thickness gradient type circular explosion-proof tank - Google Patents
Energy storage device with thickness gradient type circular explosion-proof tank Download PDFInfo
- Publication number
- CN203562463U CN203562463U CN201320800719.4U CN201320800719U CN203562463U CN 203562463 U CN203562463 U CN 203562463U CN 201320800719 U CN201320800719 U CN 201320800719U CN 203562463 U CN203562463 U CN 203562463U
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- Prior art keywords
- explosion
- energy storage
- storage device
- explosion groove
- proof tank
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- 238000004146 energy storage Methods 0.000 title claims abstract description 46
- 238000004880 explosion Methods 0.000 claims description 117
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 230000008719 thickening Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 11
- 239000012141 concentrate Substances 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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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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- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model relates to an energy storage device with a thickness gradient type circular explosion-proof tank. Existing explosion-proof tanks have the defects of stress concentration, fixed dimension and shell thickness are different to monitor and the like. The energy storage device with the thickness gradient type circular explosion-proof tank comprises a shell and a circular explosion-proof tank, wherein the thickness of the shell which is corresponding to the circular explosion-proof tank changes to the edge from a circle center in a gradually thickened mode. The energy storage device with the thickness gradient type circular explosion-proof tank improves the structure of an original explosion-proof tank into the circular explosion-proof tank with gradually thickened thickness, a thin position of the middle portion of the explosion-proof tank is broken down to open because the anti-pressure value of the explosion-proof tank is lower than the inner pressure valve of the energy storage device, and the opening size can be changed according the size of the inner pressure of the energy storage device, thereby guaranteeing a lot of gas in the energy storage device to be smoothly discharged, effectively preventing the energy storage device from exploding because a lot of gas in the energy storage device can not be discharged in time, and preventing safety accidents from happening. The energy storage device with the thickness gradient type circular explosion-proof tank enables stress distribution to be uniform through the circular explosion-proof tank when the circular explosion-proof tank and the edge of the circular explosion-proof tank are acted by inner and outer action force, is convenient to process and low in cost, can conveniently measure the thickness of a wall surface of the explosion-proof tank, and guarantees to accurately correspond to a preset compressive resistance value.
Description
Technical field
The utility model relates to a kind of energy storage device, is specifically related to a kind of energy storage device with anti-explosion groove.
Background technology
The energy storage device of application mainly comprises battery and the large class of super capacitor two at present.The storage of battery homenergic holder and release electric energy are normally realized by chemical reaction, in chemical reaction process, tend to discharge gas, after acquiring a certain degree, energy accumulator interior gas amount can in energy storage device, produce powerful interior pressure, battery is affected by interior pressure for a long time, its sealing can be damaged, and causes product to lose efficacy in advance; Another kind of ultracapacitor, that the sheath that forms one deck charge balance on the surface of electrode and electrolyte is realized electrostatic energy storage, its charging process and discharge process are pure physical processes, there is no chemistry or the relevant reaction of chemistry, charge and discharge process can not discharge gas, and be therefore eternal its useful life in theory.But in the actual use of energy storage device, when environment for use exceeds normal range (NR), for example, under high temperature and over-voltage condition, chemical reaction in battery can be abnormal violent, air venting valve has little time to open the quick gas producing of release or the material composition of ultracapacitor its container when high temperature and overvoltage can produce rapidly a large amount of gas because of chemical breakdown, after the gas flow that afore-mentioned forms acquires a certain degree, energy storage device is by violent explosion, cause heavy economic losses, jeopardize even personnel's life security.
So conventional safety relief valve comprises two kinds of pin safety valve and straight trough V-type safety valves on existing energy storage device.Pin safety valve refers to directly offers an aperture with metal forming on polar cap, and burst pressure is determined by metal foil thickness and steam vent size; V-type straight trough safety valve refers to directly offers the straight-line groove that a cross section is V-arrangement on shell, and flute length is generally at 0.5-3 centimetre, and the thickness of its compression capability and V-arrangement straight-line groove bottom is proportional.There is following defect in these two kinds of safety valves: while 1, using pin safety valve, when pinhole diameter hour, air displacement is little, and energy storage device container still can explode because air pressure inside is excessive, has potential safety hazard, when pinhole diameter is larger, not only can cause the structural strength at pin hole periphery position not good enough, occur electrolyte leakage situation, and larger area metal forming can cause its anti-pressure ability to decline for a long time under pressure-acting, in the implosion of safe pressure scope, produce mistake quick-fried; 2, V-type straight trough safety valve is when producing, and because V-shaped groove bottom is linearly, area is less, and the probe of detecting instrument cannot touch the bottommost of V-shaped groove, makes the thickness of its bottom be difficult to measure, and affects the calculating of its anti-pressure ability; 3, V-type straight trough safety valve is linearly, the uniformity of its inner wall thickness and periphery residual stress is difficult to control, easily because being subject to slight inside and outside pressure, break, have the quick-fried possibility of mistake within the scope of normal temperature and safe pressure, cause product to lose efficacy in advance.
Utility model content
In order to solve the deficiencies in the prior art, the utility model provides the energy storage device of the circular anti-explosion groove of a kind of tape thickness gradual change type, and further object is to provide a kind of anti-explosion groove that has quick pressure releasing concurrently, prevents the quick-fried function of mistake.
The utility model is realized in the following manner: the energy storage device of the circular anti-explosion groove of a kind of tape thickness gradual change type, comprise housing, on described housing, have anti-explosion groove, described anti-explosion groove is rounded, and the thickness of shell that described anti-explosion groove is corresponding is gradually thick shape to edge variation from its center of circle.Original anti-explosion groove is improved to the anti-explosion groove of gradient thickness, the thickness of anti-explosion groove bottom changes from the middle gradually thick shape that is toward edge, its middle part is the thinnest, more past edge is thicker, make the anti-pressure ability at anti-explosion groove middle part the most weak. anti-explosion groove middle part can be because its compressive resistance value be lower than the breakdown perforate of energy storage device internal pressure value, and bore size can change according to energy storage device internal pressure size, guarantee that a large amount of gases of energy storage device inside get rid of smoothly, effectively prevent that energy storage device from can not discharge explosion in time because of a large amount of gas in inside, effectively avoid security incident to occur, anti-explosion groove is circular, there is the feature of dispersive stress compared with the top tip structure of V-type anti-explosion groove, while making anti-explosion groove and edge thereof be subject to inside and outside active force, stress distribution is even, there is no stress concentration phenomenon, effectively prevent that anti-explosion groove mistake within the scope of safe pressure is quick-fried, cause energy storage device to scrap ahead of time.
As preferably, described housing comprises polar cap, and described anti-explosion groove is opened on the exposed face of described polar cap, and the bottom surface of described anti-explosion groove is dome shape, make thickness between described anti-explosion groove and described polar cap hidden surface from its center of circle to edge thickening gradually.Polar cap exposed face and hidden surface are plane, and be parallel to each other, anti-explosion groove is offered and is dome shape, anti-explosion groove coordinates the explosion-proof relief structure that forms gradient thickness with polar cap hidden surface, produce time can not produce stress concentrate, thereby avoid anti-explosion groove stress concentrate or be subject to mechanical force and produce mistake quick-fried; The processing of dome shape anti-explosion groove is simple, effectively reduces production costs; Because anti-explosion groove bottom is arc, and area is larger, facilitates the probe of detecting instrument to insert and measure thickness information, and then can correctly calculate the anti-pressure ability of anti-explosion groove.
As preferably, described anti-explosion groove edge is connected with described polar cap exposed face coupling.The edge thickness of circular anti-explosion groove is identical with polar cap thickness, and smooth excessiveness, effectively avoids the concentrated situation of stress.
As preferably, described housing comprises side pipe, and described anti-explosion groove is opened on the lateral wall of described side pipe, the rounded plane in the bottom surface of described anti-explosion groove, and indent is in the lateral wall of described side pipe, make thickness between described anti-explosion groove and described side pipe madial wall from its center of circle to both sides of the edge thickening gradually.The interior lateral wall of side pipe is parallel to each other and is circular arc, and anti-explosion groove is opened on the lateral wall of side pipe and bottom is circular flat, can not produce stress and concentrate, thereby avoid anti-explosion groove stress to concentrate or be subject to mechanical force and to produce mistake quick-fried when producing; Utilize described base plane to coordinate with the arc madial wall of side pipe the explosion-proof relief structure that forms gradient thickness, the circle centre position thickness of described bottom circular flat is the thinnest, when internal pressure is greater than the anti-pressure ability of aforementioned circle centre position, and anti-explosion groove explosion pressure release; Anti-explosion groove bottom is plane, and area is larger, facilitates the probe of detecting instrument to insert and measure thickness information, and then can correctly calculate the anti-pressure ability of anti-explosion groove.
As preferably, the edge, the left and right sides of described anti-explosion groove bottom circular flat is connected with adjacent lateral wall coupling, forms step surface up and down between both sides of the edge and adjacent lateral wall.The described anti-explosion groove left and right sides of circular flat, bottom and the lateral wall smooth excessiveness of side pipe, effectively avoid the concentrated situation of stress.
The beneficial effects of the utility model: the circular anti-explosion groove that is gradient thickness by original anti-explosion groove architecture advances, anti-explosion groove middle part thin location can be because its compressive resistance value be lower than the breakdown perforate of energy storage device internal pressure value, and bore size can change according to energy storage device internal pressure size, guarantee that a large amount of gases of energy storage device inside get rid of smoothly, effectively prevent that energy storage device from can not discharge explosion in time because of a large amount of gas in inside, avoid security incident to occur; When anti-explosion groove and edge thereof are subject to inside and outside active force, circular anti-explosion groove design can make part of the force structural stress be evenly distributed, and easy to process, with low cost, is also convenient to measure anti-explosion groove place wall thickness, guarantees that compressive resistance value calculates accurately.
Accompanying drawing explanation
Fig. 1 is the anti-explosion groove sectional structure schematic diagram of embodiment mono-;
Fig. 2 is the anti-explosion groove plan structure schematic diagram of embodiment mono-;
Fig. 3 is the perspective view of embodiment bis-;
Fig. 4 is the main TV structure schematic diagram of embodiment bis-;
Fig. 5 is A-A ' section partial structurtes schematic diagrames;
Fig. 6 is B-B ' section partial structurtes schematic diagrames;
In figure: 1, anti-explosion groove, 2, polar cap, 3, exposed face, 4, side pipe, 5, lateral wall, 6, dome shape bottom, 7, planar base.
Embodiment
Below in conjunction with specification drawings and specific embodiments, substantive distinguishing features of the present utility model is further described.
The energy storage device of the circular anti-explosion groove of a kind of tape thickness gradual change type as shown in Figure 1,3, by housing and the anti-explosion groove 1 that is opened on housing, formed, described anti-explosion groove 1 is rounded, and the thickness of shell of described anti-explosion groove 1 correspondence is gradually thick shape to edge variation from its center of circle; Described housing comprises polar cap 2, and described anti-explosion groove 1 is opened on the exposed face 3 of described polar cap 2, and the bottom surface of described anti-explosion groove 1 is dome shape, make thickness between described anti-explosion groove 1 and described polar cap 2 hidden surfaces from its center of circle to edge thickening gradually; Described anti-explosion groove 1 edge is connected with described polar cap 2 exposed face 3 couplings; Described housing comprises side pipe 4, described anti-explosion groove 1 is opened on the lateral wall 5 of described side pipe 4, the rounded plane in bottom surface of described anti-explosion groove 1, and indent is in the lateral wall 5 of described side pipe 4, make thickness between described anti-explosion groove 1 and described side pipe 4 madial walls from its center of circle to both sides of the edge thickening gradually; The edge, the left and right sides of described anti-explosion groove 1 bottom circular flat is connected with adjacent lateral wall 5 couplings, between upper and lower both sides of the edge and adjacent lateral wall 5, forms step surface.
In practical operation, the thickness of shell that described anti-explosion groove 1 circle centre position is corresponding is the thinnest, and there is minimum compressive resistance value, when producing, first, according to the default pressure release value of energy storage device, calculate the automatic-explosion thickness of corresponding housing material, reprocessing anti-explosion groove 1, anti-explosion groove 1 center of circle actual production thickness is corresponding with the theoretic throat of the case material explosion of calculating, and in thick mode gradually, process the cell body of anti-explosion groove 1 center of circle periphery, while making anti-explosion groove 1 middle part pressure be greater than default pressure release value, automatically there is explosion, and pressure release smoothly, guarantee energy storage device safety.In use, when energy storage device runs well, the actual pressure value in energy storage device is not more than preset pressure value (the compressive resistance value in anti-explosion groove 1 center of circle), and anti-explosion groove 1 is not in triggering state; When energy storage device inside makes actual pressure value be greater than preset pressure value (the compressive resistance value in anti-explosion groove 1 center of circle) because producing a large amount of gas, anti-explosion groove 1 is subject to external force and breakdown perforate.Because anti-explosion groove 1 is thick structure gradually from the center of circle to edge, corresponding compressive resistance value also changes with varied in thickness everywhere, make perforate pore size its inner actual pressure value size and changing can be along with energy storage device pressure release time, when actual pressure value is slightly larger than 1 with respect to the ratio of preset pressure value, anti-explosion groove 1 center of circle thinnest part can breakdown perforate, but this actual pressure value can not puncture anti-explosion groove 1 part that center of circle periphery is thicker, when meeting timely pressure release by perforate limited aperture in more among a small circle; Along with actual pressure value increases with respect to the ratio of preset pressure value, perforate aperture can increase and increase along with actual pressure value, to meet the requirement of timely pressure release.
In practical operation, described anti-explosion groove 1 is preferably circle, also can be processed into other shape that can effectively avoid stress to concentrate according to actual conditions, and for example oval, the arc with turning etc. not, all should be considered as specific embodiment of the utility model.
In practical operation, the utility model is applicable to energy storage device field, comprise ultracapacitor field, field of batteries, lithium-ion capacitor field, fuel cell field etc., the application of the technical solution of the utility model in above-mentioned specific field all should be considered as specific embodiment of the utility model.
Embodiment mono-
With the energy storage device of anti-explosion groove 1, by housing and be opened in anti-explosion groove 1(on polar cap 2 exposed faces 3 as shown in Figure 2) form, described anti-explosion groove 1 is rounded, the thickness of shell of described anti-explosion groove 1 correspondence is gradually thick shape to edge variation from its center of circle; The bottom surface of described anti-explosion groove 1 is dome shape, forms dome shape bottom 6, make thickness between described anti-explosion groove 1 and described polar cap 2 hidden surfaces from its center of circle to edge thickening gradually; Described anti-explosion groove 1 edge is connected with described polar cap 2 exposed face 3 couplings.Add man-hour, directly at polar cap 2 exposed faces 3, offering dome shape anti-explosion groove 1, both easy to process, can also effectively avoid stress to concentrate.When measuring anti-explosion groove 1 thickness, anti-explosion groove 1 on polar cap 2 exposed faces 3 is dome shape, the hidden surface of polar cap 2 is plane, all there is the open space of inserting for measuring instrument probe, can accurately measure the thickness of the corresponding polar cap 2 in anti-explosion groove 1 place, guarantee that actual production thickness mates with the theoretic throat calculating.
Embodiment bis-
With the energy storage device of anti-explosion groove 1, by housing and be opened in anti-explosion groove 1(on side pipe 4 lateral walls 5 as shown in Figure 4) form, described anti-explosion groove 1 is rounded, the thickness of shell of described anti-explosion groove 1 correspondence is gradually thick shape to edge variation from its center of circle; The rounded plane in bottom surface of described anti-explosion groove 1, form planar base 7, and indent is in the lateral wall 5 of described side pipe 4, make thickness between described anti-explosion groove 1 and described side pipe 4 madial walls from its center of circle to both sides of the edge thickening (as shown in Figure 5) gradually; The edge, the left and right sides of described anti-explosion groove 1 bottom circular flat is connected with adjacent lateral wall 5 couplings, between upper and lower both sides of the edge and adjacent lateral wall 5, forms step surface (as shown in Figure 6).Adding man-hour, directly on side pipe 4 lateral walls 5, offering plane, and indent forms described anti-explosion groove 1, both easy to process, can also effectively avoid stress to concentrate.When measuring anti-explosion groove 1 thickness, anti-explosion groove 1 bottom on side pipe 4 lateral walls 5 is plane, the madial wall of side pipe 4 is arcwall face, all there is the open space of inserting for measuring instrument probe, can accurately measure the thickness of the corresponding side pipe 4 in anti-explosion groove 1 place, guarantee that actual production thickness mates with the theoretic throat calculating.
Claims (5)
1. the energy storage device of the circular anti-explosion groove of tape thickness gradual change type, comprise housing, on described housing, have anti-explosion groove (1), it is characterized in that described anti-explosion groove (1) is rounded, the thickness of shell that described anti-explosion groove (1) is corresponding is gradually thick shape to edge variation from its center of circle.
2. the energy storage device of the circular anti-explosion groove of a kind of tape thickness gradual change type according to claim 1, it is characterized in that described housing comprises polar cap (2), described anti-explosion groove (1) is opened on the exposed face (3) of described polar cap (2), the bottom surface of described anti-explosion groove (1) is dome shape, make thickness between described anti-explosion groove (1) and described polar cap (2) hidden surface from its center of circle to edge thickening gradually.
3. the energy storage device of the circular anti-explosion groove of a kind of tape thickness gradual change type according to claim 2, is characterized in that described anti-explosion groove (1) edge is connected with described polar cap (2) exposed face (3) coupling.
4. the energy storage device of the circular anti-explosion groove of a kind of tape thickness gradual change type according to claim 1, it is characterized in that described housing comprises side pipe (4), described anti-explosion groove (1) is opened on the lateral wall (5) of described side pipe (4), the rounded plane in bottom surface of described anti-explosion groove (1), and indent is in the lateral wall (5) of described side pipe (4), make thickness between described anti-explosion groove (1) and described side pipe (4) madial wall from its center of circle to both sides of the edge thickening gradually.
5. the energy storage device of the circular anti-explosion groove of a kind of tape thickness gradual change type according to claim 4, the edge, the left and right sides that it is characterized in that described anti-explosion groove (1) bottom circular flat is connected with adjacent lateral wall (5) coupling, between upper and lower both sides of the edge and adjacent lateral wall (5), forms step surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320800719.4U CN203562463U (en) | 2013-12-06 | 2013-12-06 | Energy storage device with thickness gradient type circular explosion-proof tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320800719.4U CN203562463U (en) | 2013-12-06 | 2013-12-06 | Energy storage device with thickness gradient type circular explosion-proof tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203562463U true CN203562463U (en) | 2014-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320800719.4U Expired - Lifetime CN203562463U (en) | 2013-12-06 | 2013-12-06 | Energy storage device with thickness gradient type circular explosion-proof tank |
Country Status (1)
| Country | Link |
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| CN (1) | CN203562463U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023028867A1 (en) * | 2021-08-31 | 2023-03-09 | 宁德时代新能源科技股份有限公司 | Shell, battery cell, battery, and electrical device |
| WO2023045672A1 (en) * | 2021-09-24 | 2023-03-30 | 宁德时代新能源科技股份有限公司 | End cover, end cover assembly, battery cell, battery, and electrical device |
-
2013
- 2013-12-06 CN CN201320800719.4U patent/CN203562463U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023028867A1 (en) * | 2021-08-31 | 2023-03-09 | 宁德时代新能源科技股份有限公司 | Shell, battery cell, battery, and electrical device |
| WO2023045672A1 (en) * | 2021-09-24 | 2023-03-30 | 宁德时代新能源科技股份有限公司 | End cover, end cover assembly, battery cell, battery, and electrical device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200826 Address after: 322103 no.509-8, Ganxi West Street, Linjiang community, Jiangbei street, Dongyang City, Jinhua City, Zhejiang Province (self declaration) Patentee after: Zhejiang Changlin Electronic Co.,Ltd. Address before: 310019, Jianggan District, Zhejiang, nine Ring Road, No. 63, 1,, 2119, room 2 Patentee before: HANGZHOU SHANHEJIANG NEW ENERGY TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: No. 509-8, Ganxi West Street, Linjiang Community, Jiangbei Street, Dongyang City, Jinhua City, Zhejiang Province, 322103 Patentee after: Zhejiang Layer Forest Electronics Co., Ltd. Address before: 322103 no.509-8, Ganxi West Street, Linjiang community, Jiangbei street, Dongyang City, Jinhua City, Zhejiang Province (self declaration) Patentee before: Zhejiang Changlin Electronic Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140423 |
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| CX01 | Expiry of patent term |