CN104218203A - Lithium battery having fire-proof and explosion-proof device and electrical vehicle equipped with same - Google Patents
Lithium battery having fire-proof and explosion-proof device and electrical vehicle equipped with same Download PDFInfo
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- CN104218203A CN104218203A CN201410369915.XA CN201410369915A CN104218203A CN 104218203 A CN104218203 A CN 104218203A CN 201410369915 A CN201410369915 A CN 201410369915A CN 104218203 A CN104218203 A CN 104218203A
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- lithium battery
- shell
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- battery
- explosion device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/52—Removing gases inside the secondary cell, e.g. by absorption
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/383—Flame arresting or ignition-preventing means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/394—Gas-pervious parts or elements
-
- 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
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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
Abstract
The invention discloses a lithium battery having a fire-proof and explosion-proof device. The lithium battery includes a cell set and an external shell. The cell set is arranged in the external shell. A clearance between the cell set and the external shell is filled with a fire extinguish material which can be subject to an endothermic reaction and generates carbon dioxide. The external shell is provided with a discharging hole. In the device, during a use process of the lithium battery, the fire extinguish material, which can be subject to an endothermic reaction when being heated and generates carbon dioxide, is used as a working medium for performing heat absorption and oxygen insulation to the battery. In addition, an internal pressure of the battery can be regulated timely. By the comprehensive protective method above, accidents, such as ignition, explosion and the like, can be effectively prevented so that safe risk of the lithium battery can be greatly reduced.
Description
Technical field
The present invention relates to a kind of lithium battery and the application product thereof with fireproof anti-explosion device, in particular, it relates to and a kind ofly has the lithium battery of fireproof anti-explosion device and apply the electric motor car of this battery.
Background technology
Due to non-renewable energy resources crisis and environmental pollution serious, the whole world accelerates the development of environmental protection high-performance lithium battery, the application of lithium battery extends to traffic power by digital product field, energy storage, space flight, the fields such as communication spare power supplies, people also develop into even thousands of ampere-hour up to a hundred by original hundreds of MAH to the demand of lithium battery, along with the lifting of capacity, safety problem will be difficult to control more, therefore high-capacity lithium battery fail safe is now the problem of numerous enterprises research, if it is on fire to resolve lithium battery, explode this global problem, the application of lithium battery will enter faster wider developing stage.Publication number is that the invention of CN102044715A discloses a kind of explosion-proof equipment of lithium battery on May 4th, 2011, it comprises the structure of lithium battery casing, positive electrode, negative electrode, sheet rubber, lithium battery casing is provided with air vent hole, air vent hole covers and is fixed with sheet rubber, the thickness of sheet rubber is 0.5-5mm.Owing to adopting sheet rubber as explosion-proof valve, injecting electrolyte and nitrogen, liquid injection hole and explosion-proof valve being integrated without the need to offering liquid injection hole in addition in battery, structure is simple, and cost is low, easy to process simple to operate; During use, only need inwardly inject electrolyte and nitrogen with needle tubing through sheet rubber, after extracting syringe needle, utilize the enclosed elastic of sheet rubber pin hole, reach electrolyte and nitrogen does not leak, lithium battery normally works.This invention is applicable to the lithium battery of various shape and different-thickness.But lithium battery causes in what is called " thermal runaway " problem mainly caused due to short circuit, the heat radiation reason such as not smooth of blasting, " thermal runaway " and then initiation inner pressure of battery increase severely, thus set off an explosion, therefore prevent lithium battery from exploding and not only will drain interior pressure in time, also should control from temperature, prevent the links such as short circuit from starting with, many-side takes measures more effectively to reach the explosion-proof target of lithium battery, and this invention only lays particular emphasis on by air vent hole and explosion-proof valve pressure release, instead of adopt more fully safeguard procedures, therefore produce effects comparatively limited.
Summary of the invention
Lithium battery is very easily because short circuit, the problem such as bad of dispelling the heat cause blast on fire, and the fire-proof and explosion-proof measure of existing lithium battery can only limitedly improve subproblem and can not deal with problems comprehensively, for overcoming this defect, the invention provides a kind of lithium battery fireproof anti-explosion device strengthening fire-proof and explosion-proof function for the lithium battery blast on fire origin cause of formation, additionally provide a kind of electric motor car of this device of application.
Technical scheme of the present invention is: a kind of lithium battery with fireproof anti-explosion device, described lithium battery comprises battery core group and shell, battery core group is placed in shell, be filled with in the gap of battery core group and shell and the endothermic reaction can occur when being heated and the extinguish material producing carbon dioxide, shell is provided with dredging hole.This device carries out the work of dependent response formula for the mechanism of lithium battery blast on fire, namely by the rising of lithium battery electric core temperature, extinguish material is impelled to react, thermal property is inhaled when reacting according to this extinguish material on the one hand, by the heat absorption that lithium battery interior generates, play the effect suppressing temperature to raise fast; On the other hand, the carbon dioxide utilizing reaction to generate progressively squeezes the oxygen of inside battery, eliminates and supports that the key element of burning occurs battery core, thus reach the object suppressing burning; Moreover, by dredging hole, air original in shell and the carbon dioxide that generated afterwards are discharged in time while utilizing this extinguish material absorbing and cooling temperature, keep inner pressure of battery to be stabilized in a lsafety level.By above-mentioned measure, this device effectively can prevent lithium battery blast on fire, greatly improves lithium battery safety in utilization.Extinguish material can be a kind of composition, generates carbon dioxide by selfdecomposition reaction.
As preferably, described dredging hole is provided with relief valve, relief valve comprises valve body and active valve block, and valve body opening has been threaded valve gap, and bonnet central is provided with central through hole, the valve pocket of up big and down small taper type is provided with in valve body, active valve block also also slides adaptedly in taper type and is arranged in valve pocket, and be provided with a stage clip between valve gap and active valve block, stage clip one end is hooked on active valve block, the other end is connected to valve gap bottom surface, and stage clip circle circle external diameter is greater than central through hole diameter.In its natural state, active valve block extrudes by stage clip, is pressed in valve pocket, blocks valve pocket.When enclosure air pressure increases, active valve block finally outwards can be backed down because of the pressure differential inside and outside shell, remove the shutoff to valve pocket, thus the pressure making enclosure excessive is discharged, guarantee that inner pressure of battery is in safer level, reduce risk of explosion.The passage that leaks of a small amount of air of enclosure is entered when relief valve is also battery assembling on the other hand, under the exclusion of the carbon dioxide constantly generated in the enclosure, original air containing oxygen is progressively drained, and extraneous air can be stopped again enter when pressing in the safety maintaining battery, so in the absence of oxygen, the battery core group of battery can not be burnt, thus plays fire-retardant fireproof effect.
As preferably, described extinguish material is bicarbonate.Selfdecomposition reaction can be there is when bicarbonate is heated, generate carbon dioxide, and this reaction is the endothermic reaction, meets the need of work of this device.Select bicarbonate to be extinguish material, install additional, deposit in battery all more convenient.
As preferably, described bicarbonate is sodium acid carbonate, saleratus, calcium bicarbonate, carbonic hydroammonium or its mixture.These be all common be easy to get and slightly under high-temperature with regard to the bicarbonate of decomposable asymmetric choice net reaction.
As preferably, described dredging hole is positioned at cover top portion.The carbon dioxide density that described extinguish material decomposition generates is greater than the atmospheric density under equal conditions, carbon dioxide more easily sinks to shell inner bottom part, thus original air is extruded into shell inner top, therefore the fast evacuation that dredging hole is more conducive to original air is set in cover top portion, and the storage of newly-generated carbon dioxide is stayed, form the anaerobic environment of inside battery, realize the object of fire-retardant fireproof better.
As preferably, be provided with heat insulation layer in described shell, described heat insulation layer is arranged between inner surface of outer cover and extinguish material.Heat insulation layer can prevent outside high heat from entering inside battery on the one hand, prevent inside battery heat energy dissipation on the other hand, decomposition reaction for extinguish material provides necessary energy, and therefore extinguish material by the heat absorption of lithium battery generation, can play the effect suppressing temperature to raise fast.
As preferably, described heat insulation layer material is silicon dioxide.Silicon dioxide has good insulating refractory performance.
As preferably, shell is formed from aluminium.The density of aluminium is less, and the shell made is lighter relative to iron, lead alloy etc., is conducive to cell integrated lightweight.
A kind of electric motor car, has the lithium battery of fireproof anti-explosion device described in application.
The invention has the beneficial effects as follows:
Greatly improve the security protection performance of lithium battery, reduce battery use safety risk.This device in lithium battery use procedure to be heated time can there is the endothermic reaction and the extinguish material producing carbon dioxide as working media, battery is absorbed heat and starvation, and inner pressure of battery can be regulated and controled in time, by adopting above comprehensive protecting method, effectively can prevent the accidents such as on fire, blast from occurring, greatly reduce the security risk that battery uses.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 be in the present invention relief valve a kind of structural representation;
Fig. 3 is a kind of structural representation of lithium battery in the present invention;
Fig. 4 is a kind of confined state schematic diagram of lithium battery in the present invention.
In figure, 1-battery core group, 2-heat insulation layer, 3-shell, 4-relief valve, 5-valve body, 6-active valve block, 7-valve gap, 8-central through hole, 9-valve pocket, 10-stage clip, 11-bicarbonate powder.
Embodiment
Below in conjunction with accompanying drawing specific embodiment, the invention will be further described.
embodiment:
As Fig. 1, Fig. 2, Fig. 3, shown in Fig. 4, a kind of electric motor car, which is provided with a kind of lithium battery with fireproof anti-explosion device, described lithium battery comprises battery core group 1, shell 3, battery core group 1 is placed in shell 3, be filled with in the gap of battery core group 1 and shell 3 can decomposes the bicarbonate powder 11 discharging carbon dioxide as temperature control extinguish material, it is sodium acid carbonate in the present embodiment, shell 3 is formed from aluminium, shell 3 is an approximate cuboid closed, by housing, upper cover, bottom forms, the top cover of shell 3 is provided with a dredging hole, preferably on dredging hole, be provided with relief valve 4.Relief valve 4 comprises valve body 5 and active valve block 6, valve body 5 mouthfuls has been threaded valve gap 7, valve gap 7 center is provided with central through hole 8, be provided with the valve pocket 9 of up big and down small taper type in valve body 5, active valve block 6 also also slides adaptedly in taper type and is arranged in valve pocket 9, and active valve block 6 tapering is equal with valve pocket 9 tapering, a stage clip 10 is provided with between valve gap 7 and active valve block 6, stage clip 10 one end is hooked on active valve block 6, and the other end is connected to valve gap 7 bottom surface, and stage clip 10 circle circle external diameter is greater than central through hole 8 diameter.Suitable specification selected by stage clip 10, and when shell 3 air pressure inside reaches certain air pressure during atmospheric pressure, shell 3 internal pressure suffered by active valve block 6 can overcome stage clip 10 elastic force just.Be provided with heat insulation layer 2 in shell 3, this heat insulation layer 2 can be formed with silicon dioxide or asbestos, and the heat insulation layer 2 formed by silicon dioxide or asbestos is arranged between shell 3 inner surface and extinguish material sodium acid carbonate, and sodium acid carbonate is located between heat insulation layer and battery core group 1.
Lithium battery is in the course of the work once because of reason adstante febres such as short circuits, shell 3 internal temperature and shell 3 air pressure inside also rise thereupon, when temperature arrives 50 DEG C, sodium acid carbonate starts chemical reaction occurs, resolve into sodium carbonate, water and carbon dioxide, the thermal decomposition of sodium acid carbonate is an endothermic process, and in thermal decomposition process, constantly consume heat energy, this can suppress shell 3 internal temperature to rise fast.The carbon dioxide generated to be mixed in shell 3 after original air, shell 3 internal gas pressure increases further, when shell 3 internal gas pressure reaches two atmospheric pressure, active valve block 6 can be promoted by shell 3 internal gas pressure, the elastic force overcoming stage clip 10 rises, and active valve block 6 departs from adapting position that is original and valve pocket 9, has occurred space between active valve block 6 and valve pocket 9 chamber wall, shell 3 air pressure inside just can leak via this space, until shell 3 internal gas pressure falls back to below two atmospheric pressure.Carbon dioxide constantly produces, and the inner original a small amount of air of shell 3 is drained gradually, and the oxygen of such shell 3 inside is finally drained, and shell 3 internal voids is finally all occupied by carbon dioxide.Without oxygen, shell 3 inside just loses the essential elements of battery core group burning, thus reaches the object of fire-retardant fireproof, avoids more serious security incident occurs.In the present embodiment, can be only be provided with dredging hole on the top cover of shell 3, and do not establish relief valve, lithium battery is in the course of the work once because of reason adstante febres such as short circuits, and battery core inner material produces reaction, and causes battery core internal pressure to become large, battery core is broken, the thermals source such as the gas that battery core inside produces and particle, under the effect of internal pressure, by outside dredging hole ejection housing, decrease the thermal source of enclosure interior, the rising of shell 3 internal temperature simultaneously, sodium acid carbonate starts chemical reaction occurs, resolve into sodium carbonate, water and carbon dioxide, the thermal decomposition of sodium acid carbonate is an endothermic process, constantly heat energy is consumed in thermal decomposition process, this can suppress shell 3 internal temperature to rise fast, the carbon dioxide produced to be mixed in shell 3 after original air, shell 3 internal gas pressure increases further, oxygen is discharged housing 3 by dredging hole, and completely cut off inner for shell 3 with external oxygen, because carbon dioxide constantly produces, and the inner original a small amount of air of shell 3 is drained gradually, the oxygen of such shell 3 inside is finally drained, and shell 3 internal voids is finally all occupied by carbon dioxide, without oxygen, shell 3 inside just loses the essential elements of battery core group burning, thus reach the object of fire-retardant fireproof, avoid more serious security incident occurs.In addition, due to the generation of carbon dioxide, to adulterate carbon dioxide from the thermal source of dredging hole ejection, also greatly reduce the danger of ejection thermal source.In the present embodiment, the bicarbonate as extinguish material can also be that saleratus, calcium bicarbonate, carbonic hydroammonium etc. can carry out endothermic decomposition in different temperature points and generate the bicarbonate of carbon dioxide, or the mixture of these bicarbonates.
The lithium battery with fireproof anti-explosion device of the present invention can be applied in as on the vehicles such as electric bicycle, battery-operated motor cycle, electric automobile.
Claims (9)
1. one kind has the lithium battery of fireproof anti-explosion device, described lithium battery comprises battery core group (1) and shell (3), battery core group (1) is placed in shell (3), it is characterized in that being filled with in the gap of battery core group (1) and shell (3) and the endothermic reaction can occur when being heated and the extinguish material producing carbon dioxide, shell (3) is provided with dredging hole.
2. a kind of lithium battery with fireproof anti-explosion device according to claim 1, it is characterized in that dredging hole is provided with relief valve (4), relief valve (4) comprises valve body (5) and active valve block (6), valve body (5) mouth has been threaded valve gap (7), valve gap (7) center is provided with central through hole (8), the valve pocket (9) of up big and down small taper type is provided with in valve body (5), active valve block (6) also also slides adaptedly in taper type and is arranged in valve pocket (9), a stage clip (10) is provided with between valve gap (7) and active valve block (6), stage clip (10) one end is hooked on active valve block (6), the other end is connected to valve gap (7) bottom surface, stage clip (10) circle circle external diameter is greater than central through hole (8) diameter.
3. a kind of lithium battery with fireproof anti-explosion device according to claim 1, is characterized in that described extinguish material is bicarbonate.
4. the lithium battery with fireproof anti-explosion device according to claim 3, is characterized in that described bicarbonate is sodium acid carbonate, saleratus, calcium bicarbonate, carbonic hydroammonium or its mixture.
5. the lithium battery with fireproof anti-explosion device according to claim 1, is characterized in that described dredging hole is positioned at shell (3) top.
6. the lithium battery with fireproof anti-explosion device according to claim 1, it is characterized in that being provided with heat insulation layer (2) in described shell (3), described heat insulation layer (2) is arranged on shell (3) between inner surface and extinguish material.
7. the lithium battery with fireproof anti-explosion device according to claim 6, is characterized in that described heat insulation layer material is silicon dioxide.
8. the lithium battery fireproof anti-explosion device according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, is characterized in that shell (3) is formed from aluminium.
9. an electric motor car, is characterized in that, application rights requirement 1 or 2 or 3 or 4 or the lithium battery with fireproof anti-explosion device described in 5 or 6 or 7.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410369915.XA CN104218203B (en) | 2014-07-30 | 2014-07-30 | A kind of lithium battery with fireproof anti-explosion device and the electric car using the battery |
| PCT/CN2015/085029 WO2016015603A1 (en) | 2014-07-30 | 2015-07-24 | Lithium battery and electric vehicle using same |
| EP15827608.9A EP3176847B1 (en) | 2014-07-30 | 2015-07-24 | Lithium battery and electric vehicle using same |
| US15/327,893 US10319970B2 (en) | 2014-07-30 | 2015-07-24 | Lithium-ion battery and electric vehicle utilizing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410369915.XA CN104218203B (en) | 2014-07-30 | 2014-07-30 | A kind of lithium battery with fireproof anti-explosion device and the electric car using the battery |
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| Publication Number | Publication Date |
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| CN104218203A true CN104218203A (en) | 2014-12-17 |
| CN104218203B CN104218203B (en) | 2017-12-29 |
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| CN201410369915.XA Active CN104218203B (en) | 2014-07-30 | 2014-07-30 | A kind of lithium battery with fireproof anti-explosion device and the electric car using the battery |
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| Country | Link |
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| CN (1) | CN104218203B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016015603A1 (en) * | 2014-07-30 | 2016-02-04 | 浙江超威创元实业有限公司 | Lithium battery and electric vehicle using same |
| CN108110381A (en) * | 2018-02-06 | 2018-06-01 | 华霆（合肥）动力技术有限公司 | Battery modules and electric car |
| TWI643381B (en) * | 2017-11-16 | 2018-12-01 | 新盛力科技股份有限公司 | Battery device having anti-fire spreading structure |
| CN113258634A (en) * | 2021-04-16 | 2021-08-13 | 郑立臣 | Automatic lithium cell charging seat of outage explosion-proof type |
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| CN101107731A (en) * | 2005-03-25 | 2008-01-16 | 株式会社Lg化学 | Small battery pack having frame retardant adhesive member |
| CN201191627Y (en) * | 2008-03-28 | 2009-02-04 | 黄德欢 | Safety valve of lithium ionic cell |
| US20100047673A1 (en) * | 2006-10-13 | 2010-02-25 | Yasushi Hirakawa | Battery pack and battery-mounted device |
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| CN101107731A (en) * | 2005-03-25 | 2008-01-16 | 株式会社Lg化学 | Small battery pack having frame retardant adhesive member |
| US20100047673A1 (en) * | 2006-10-13 | 2010-02-25 | Yasushi Hirakawa | Battery pack and battery-mounted device |
| CN201191627Y (en) * | 2008-03-28 | 2009-02-04 | 黄德欢 | Safety valve of lithium ionic cell |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016015603A1 (en) * | 2014-07-30 | 2016-02-04 | 浙江超威创元实业有限公司 | Lithium battery and electric vehicle using same |
| US10319970B2 (en) | 2014-07-30 | 2019-06-11 | Zhejiang Chilwee Chuangyuan Industry Company Ltd. | Lithium-ion battery and electric vehicle utilizing the same |
| TWI643381B (en) * | 2017-11-16 | 2018-12-01 | 新盛力科技股份有限公司 | Battery device having anti-fire spreading structure |
| CN108110381A (en) * | 2018-02-06 | 2018-06-01 | 华霆（合肥）动力技术有限公司 | Battery modules and electric car |
| CN108110381B (en) * | 2018-02-06 | 2024-03-29 | 华霆（合肥）动力技术有限公司 | Battery module and electric vehicle |
| CN113258634A (en) * | 2021-04-16 | 2021-08-13 | 郑立臣 | Automatic lithium cell charging seat of outage explosion-proof type |
| CN113258634B (en) * | 2021-04-16 | 2023-07-04 | 深圳市奔美程科技有限公司 | Automatic outage explosion-proof type lithium battery charging seat |
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Effective date of registration: 20201028 Address after: 313100, Huzhou, Zhejiang, Changxing County Province, pheasant Town, emerging industrial park, No. 12, Pheasant Road Patentee after: ZHEJIANG CHILWEE CHUANGYUAN INDUSTRIAL Co.,Ltd. Address before: 313100 No. 5-13, Changhe Road, Paixi Street, Changxing County, Huzhou City, Zhejiang Province Patentee before: Changxing Chaoyue New Energy Technology Co.,Ltd. |
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