CN111337201A - Liquid leakage detection device, battery module and battery pack thereof - Google Patents
Liquid leakage detection device, battery module and battery pack thereof Download PDFInfo
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- CN111337201A CN111337201A CN202010336872.0A CN202010336872A CN111337201A CN 111337201 A CN111337201 A CN 111337201A CN 202010336872 A CN202010336872 A CN 202010336872A CN 111337201 A CN111337201 A CN 111337201A
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- battery
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
- G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/186—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4228—Leak testing of cells or batteries
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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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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- Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a leakage detection device, a battery module and a battery pack thereof. The liquid leakage detection device comprises a belt-shaped body and a wire connecting part arranged at the end part of the belt-shaped body. Two wires which are parallel to each other and embedded in the insulator are arranged in the strip-shaped body along the strip direction of the strip-shaped body, and the two wires are connected with the wiring part. Along the wire arrangement direction, the upper surface of the banded body is provided with a plurality of wire windows. The wire window is opened on the insulator such that the wire is exposed. A leakage detection device is arranged on a bottom plate of the battery module in the battery pack. According to the invention, the capillary holes or capillaries are formed between the lead window and the battery above the lead window, so that the lead window can adsorb the battery leakage in the battery module through the capillary effect, and the battery leakage short-circuits the two leads, and thus, whether the battery has the leakage problem can be judged by detecting the resistance between the two leads.
Description
Technical Field
The invention relates to battery leakage detection and liquid cooling leakage detection in a battery module and a battery pack.
Background
In an electric automobile, a battery energy storage module provides electric energy, and an electric motor converts the electric energy into kinetic energy of automobile running. Therefore, in the field of electric vehicles, battery energy storage modules are key technologies. In the prior art, a battery energy storage module of an electric vehicle is usually implemented by a battery pack, the battery pack includes a plurality of battery modules, and each battery module is provided with a plurality of batteries therein. In the prior art, the battery in the battery module includes an electrolyte. The vibration and the collision during the traveling of the electric vehicle, and the battery age may cause the breakage of the battery, and the leakage of the electrolyte occurs. In addition, a liquid cooling system is usually arranged in the battery pack to solve the heat dissipation problem of the battery. The vibration and the collision in the advancing process of the electric automobile and the age of the liquid cooling system can also cause the damage of the pipeline or the pipeline interface of the liquid cooling system, and the liquid leakage occurs. Battery leakage and liquid cooling system leakage can undoubtedly lead to various safety problems. The battery pack is therefore typically provided with a leakage detection device or system.
In the prior art, a plurality of methods for detecting leakage exist. For example, in a battery pack, a leakage detection method, and a leakage detection device disclosed in patent document CN 110243551 a, leakage is detected by a change in resistance of a cable type water sensor; for example, in a liquid leakage detection device, a system, and an electric vehicle disclosed in patent document CN 108318827 a, it is determined whether or not liquid leakage exists by detecting a resistance between a negative electrode of a battery module and a ground point and a change in the battery; further, for example, in "liquid leakage detection device and liquid cooling system for battery" disclosed in patent document CN 207780204U, the presence or absence of leakage is determined by an electric signal returned by an electrochemical reaction generated when the positive electrode layer and the negative electrode layer leak.
In the prior art, the main problem of the leakage detection in the battery module and the battery pack is not in the technology of the leakage detector for detecting leakage itself, but in the particularity of the leakage situation of the battery. When leakage occurs in the battery, the leakage usually occurs at the positive electrode and the negative electrode above the battery, and therefore, the amount of the leaked liquid is usually relatively small and usually does not exceed 50 ml. Such a small amount of leaked liquid is difficult to reach the leakage detection device, and even when the liquid does not flow to the leakage detection device, the liquid is evaporated to dryness by the high-temperature environment in the battery pack, and thus cannot be detected by the leakage detection device.
Disclosure of Invention
The problems to be solved by the invention are as follows: when a battery is leaked, the leaked liquid generally leaks from the positive electrode and the negative electrode above the battery, so the amount of the leaked liquid is generally small, and the small amount of the leaked liquid is difficult to reach the leakage detection device and cannot be detected by the leakage detection device.
In order to solve the problems, the invention adopts the following scheme:
the leakage detection device comprises a belt-shaped body and a wire connecting part arranged at the end part of the belt-shaped body; two wires which are parallel to each other and embedded in the insulator are arranged in the strip-shaped body along the strip direction of the strip-shaped body; two wires are connected with the wiring part; a plurality of lead windows are arranged on the upper surface of the band-shaped body along the lead arrangement direction; the wire window is opened on the insulator such that the wire is exposed.
Further, according to the leakage detecting apparatus of the present invention, the opening depth of the wire window on the insulator does not exceed 1.0 mm.
Further, according to the leakage detection device of the present invention, the wire window is composed of two openings independent of each other; the two mutually independent openings correspond to the two wires respectively.
Further, according to the leakage detecting device of the present invention, the wire window is an opening communicating the two wires.
Further, according to the leakage detection device of the present invention, the opening of the wire window is filled with a porous hydrophilic material.
Further, according to the leakage detection device, a layer of porous hydrophilic material is laid on the upper surface of the belt-shaped body.
Further, according to the liquid leakage detection apparatus of the present invention, the band-shaped body is made of a flexible material, and the lead is made of a flexible metal.
Further, according to the liquid leakage detection device, the lower surface of the band-shaped body is further paved with an adhesive layer.
Further, the battery module according to the present invention is characterized in that the battery module comprises a battery module main body, a bottom plate disposed at the bottom of the battery module main body, and the above-mentioned leakage detecting device; a strip-shaped detection groove is formed in the bottom plate; the band-shaped body of the liquid leakage detection device is arranged in the strip-shaped detection groove.
Further, the battery pack according to the present invention is characterized in that the battery pack includes a case, a plurality of the above battery modules disposed in the case, and a battery management module disposed in the case; the battery management module is connected with the interface part of the leakage detection device in each battery module, and the battery management module judges whether the battery in the battery module leaks or not by detecting the resistance between two leads of the leakage detection device.
The invention has the following technical effects:
1. according to the invention, the capillary holes or capillaries are formed between the lead window and the battery above the lead window, so that the lead window can adsorb the battery leakage in the battery module through the capillary effect, and the battery leakage short-circuits the two leads, so that whether the battery has the leakage problem can be judged by detecting the resistance between the two leads, and the battery module can be detected when the leakage amount of the battery leakage exceeds 8 ml.
2. The opening mode of the lead window can prevent the two leads from being short-circuited by metal of other parts in the battery module due to the fact that the leads are in contact with the metal of other parts in the battery module when the leads are completely exposed.
3. The leakage detection device is narrow in size, thin in structure, small in occupied space, flexible in installation in the battery module, small in size, light in weight and almost free of influence on the specific mass energy of the battery pack, and can be installed in a narrow limited space.
4. The leakage detection device is simple in structure and easy to manufacture and realize, the position of the lead window can be customized according to the structure of the battery module, the number of monitoring points is large, and the effectiveness is good.
5. In the leakage detection device, the two parallel wires are embedded in the insulating material, so that the reliability is high and the failure is not easy to occur.
Drawings
Fig. 1 is an exploded view illustrating the overall structure of a battery module according to an embodiment of the present invention.
Fig. 2 is a schematic view of the overall structure of the liquid leakage detection device according to the embodiment of the present invention. The right-side dashed-line frame part is an enlarged view of the left-side dashed-line frame part.
Fig. 3 is a sectional view of the leakage detecting apparatus according to the embodiment of the present invention mounted on a bottom plate of a battery module.
Fig. 4, 5, and 6 are cross-sectional views of a leakage detection device according to different embodiments of the present invention.
Wherein 100 is a battery module, 110 is a battery module main body, 120 is a bottom plate, 121 is a strip-shaped detection groove, 2 is a leakage detection device, 21 is a wiring part, 22 is a band-shaped body, 221 is a lower insulating layer, 222 is an upper insulating layer, 223 is a lead, 224 is an adhesive layer, 226 is a porous hydrophilic material layer, and 23 is a lead window.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As is well known, a battery pack generally comprises a case, a plurality of battery modules disposed in the case, and a battery management module disposed in the case. Among them, the battery management module is a BMS, i.e., a battery management system, which is well known to those skilled in the art. Since this structure is familiar to those skilled in the art, the present specification does not give a schematic view of the battery pack, but this does not hinder the understanding of the present invention by the skilled person. As shown in fig. 1, the battery module 100 in the battery pack includes a battery module main body 110, a bottom plate 120 disposed at the bottom of the battery module main body 110, and a leakage detection device 2. As shown in fig. 2, the liquid leakage detection device 2 includes a band 22 and a wire connection portion 21 provided at an end of the band 22. The bottom plate 120 is provided with a strip-shaped detection groove 121. The strip-like body 22 of the liquid leakage detection device 2 is disposed in the strip-like detection tank 121, as shown in fig. 3. When the strip-shaped body 22 is disposed in the strip-shaped detection groove 121, the upper surface of the strip-shaped body 22 is flush with the upper surface of the entire bottom plate 120.
The strip 22 includes a lower insulating layer 221, an upper insulating layer 222, a wire 223, and an adhesive layer 224. The lower insulating layer 221 and the upper insulating layer 222 are each an insulator made of a flexible material, preferably a polyimide film or a polyester film. The lower insulating layer 221 and the upper insulating layer 222 are adhered to each other up and down. The two wires 223 are embedded between the lower insulating layer 221 and the upper insulating layer 222 and are wrapped by the insulating materials of the lower insulating layer 221 and the upper insulating layer 222. The two leads 223 are parallel to each other and arranged along the longitudinal direction of the strip. The lead 223 is an elongated thin sheet made of flexible metal. Two leads 223 are connected to the terminal portion 21 at the end of the strip-shaped body 22. The wiring portion 21 is a connector for connecting the battery management module. The adhesive layer 224 is provided below the lower insulating layer 221, and is typically a double-sided adhesive tape, and is used to adhere the strip-shaped body 22 to the strip-shaped detection groove 121. The upper surface of the strip-shaped body 22 is provided with a plurality of wire windows 23. Specifically, the wire window 23 is an opening in the upper insulating layer 222, which exposes the wire 223, and the depth of the opening is not more than 1.0mm, preferably 0.5 mm. The wire window 23 may be composed of two openings independent of each other. The two independent openings correspond to the two wires 23, respectively, as shown in fig. 3. The wire window 23 may be an opening for connecting two wires, as shown in fig. 4; the upper surface of the band 22 may be a groove that penetrates both the left and right sides in the transverse direction, as shown in fig. 5.
The working principle of the embodiment is as follows: when the electrolyte in the battery module leaks, it flows toward the bottom plate 120 under the influence of gravity. The bottom plate 120 is generally attached to the battery in the battery module or a liquid cooling system above the bottom plate 120. The leakage on the bottom plate 120 is naturally absorbed into the opening of the wire window 23 through the gap between the attachments and the gap generated by the attachment of the wire window 23 to the upper member. When the electrolyte enters the lead window 23 and is immersed by the electrolyte, the two leads 23 are short-circuited, so that the resistance between the two leads 23 appears small. When there is no leakage of the electrolyte, the resistance between the two wires 23 appears large due to the obstruction by the insulating material. Thus, the power management module determines whether there is a liquid leakage problem by detecting the resistance between the two wires 23. Normally, when there is no leakage of the electrolyte, the resistance between the two lead wires 23 exceeds 10M Ω, and when the lead window 23 is submerged by the leakage, the resistance between the two lead wires 23 may be less than 1 Ω.
It should be noted that in the present embodiment, the strip-shaped detection groove 121 is disposed on the side of the bottom plate 120, because the leaked liquid can only flow to the bottom plate 120 through the edge in consideration of the existence of the obstruction of the liquid cooling system above the bottom plate 120. If there is no separation of the liquid cooling system, or the liquid cooling system is hollow, the leakage liquid may flow into the bottom plate 120 through the hollow gap of the liquid cooling system, and at this time, those skilled in the art understand that the strip-shaped detection tank 121 may also be disposed in the center of the bottom plate 120, or may also be disposed along the battery electrodes in the battery module, so that the strip-shaped body 22 is located right below the battery electrodes, or disposed along the hollow of the liquid cooling system. In addition, the present embodiment gives an illustration that only one side of the bottom plate 120 is provided with the strip-shaped detection groove 121. Those skilled in the art will understand that there may be a plurality of strip-shaped detection grooves 121 provided on the bottom plate 120, and each strip-shaped detection groove 121 accommodates one strip-shaped body of the leakage detection device 2. Thus, a plurality of leakage detection devices 2 may be provided below the battery module.
In addition, to improve the detection effect, the lead windows 23 may be arranged at intervals of the batteries within the battery module. For example, the lead window 23 is located just at the gap between two cells. Or when the hollow liquid cooling system is disposed above the bottom plate 120, the wire window 23 may be disposed at the hollow portion of the liquid cooling system.
In addition, in order to improve the detection effect, the opening of the wire window 23 may be filled with a porous hydrophilic material, and even a layer of porous hydrophilic material 226 may be laid on the upper surface of the strip-shaped body 22 as shown in fig. 6, where the porous hydrophilic material may be cotton cloth, spray-melt cloth, or the like. The porous hydrophilic material layer 226 can insulate the metal components in the battery module from short-circuiting the two leads.
In addition, for improving the detection effect, a hydrophobic material layer can be arranged on the peripheral surface of the battery module, the surface of the liquid cooling system and the surface of the bottom plate, so that the wire window 23 on the strip-shaped body 22 can adsorb leakage conveniently.
In addition, it should be noted that in this embodiment, the power management module determines whether there is a liquid leakage problem by detecting the resistance between the two wires 23. Those skilled in the art will appreciate that the resistance detection may also be converted into a voltage or current detection by the conversion of the circuit.
In addition, it is apparent that the arrangement of the lead windows 23 is required to avoid metal contact with other components in the battery module, and the specific size thereof is related to the arrangement of other components in the battery module.
In addition, in the present embodiment, the strip 22 is divided into a lower insulating layer 221 and an upper insulating layer 222. Those skilled in the art will appreciate that the strip 22 may also be manufactured by a flexible circuit board manufacturing process, in which case the leads 23 may be printed copper foil or aluminum foil.
In this embodiment, the width of the band 22 is 0.5-50.0 mm, the thickness is 0.1-2.0 mm, and the distance between the two wires 23 is 0.2-20.0 mm.
In the present embodiment, the strip 22 is adhered to the strip-shaped detection groove 121 by a back adhesive, and those skilled in the art will understand that in practical application, the strip may be fixed by riveting or bolt.
In the present embodiment, the strip 22 is provided with the wire connecting portion 21 at both ends, and those skilled in the art will understand that the wire connecting portion 21 may be provided at only one end.
Claims (10)
1. The liquid leakage detection device is characterized by comprising a belt-shaped body and a wiring part arranged at the end part of the belt-shaped body; two wires which are parallel to each other and embedded in the insulator are arranged in the strip-shaped body along the strip direction of the strip-shaped body; two wires are connected with the wiring part; a plurality of lead windows are arranged on the upper surface of the band-shaped body along the lead arrangement direction; the wire window is opened on the insulator such that the wire is exposed.
2. The leak detection apparatus as defined in claim 1, wherein said wire window is opened in the insulator to a depth of not more than 1.0 mm.
3. The leak detection apparatus as defined in claim 1, wherein said wire window is comprised of two mutually independent openings; the two mutually independent openings correspond to the two wires respectively.
4. The leak detection apparatus as defined in claim 1, wherein said wire window is an opening communicating two wires.
5. The leak detection apparatus as defined in claim 1, wherein the opening of the wire window is filled with a porous hydrophilic material.
6. The leak detection apparatus as defined in claim 1, wherein the upper surface of the strip is further coated with a layer of porous hydrophilic material.
7. The leak detection apparatus as defined in claim 1, wherein said strip is made of a flexible material and said wire is made of a flexible metal.
8. The leak detection apparatus as claimed in claim 1, wherein an adhesive layer is further laid on the lower surface of the strip.
9. The battery module is characterized by comprising a battery module main body, a bottom plate arranged at the bottom of the battery module main body and the leakage detection device as claimed in any one of claims 1 to 8; a strip-shaped detection groove is formed in the bottom plate; the band-shaped body of the liquid leakage detection device is arranged in the strip-shaped detection groove.
10. The battery pack is characterized by comprising a box body, a plurality of battery modules according to claim 9 and a battery management module, wherein the battery modules are arranged in the box body; the battery management module is connected with the interface part of the leakage detection device in each battery module, and the battery management module judges whether the battery in the battery module leaks or not by detecting the resistance between two leads of the leakage detection device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010336872.0A CN111337201A (en) | 2020-04-26 | 2020-04-26 | Liquid leakage detection device, battery module and battery pack thereof |
| PCT/CN2021/087356 WO2021218642A1 (en) | 2020-04-26 | 2021-04-15 | Liquid leakage detection device for battery module and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010336872.0A CN111337201A (en) | 2020-04-26 | 2020-04-26 | Liquid leakage detection device, battery module and battery pack thereof |
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| CN111337201A true CN111337201A (en) | 2020-06-26 |
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| CN202010336872.0A Pending CN111337201A (en) | 2020-04-26 | 2020-04-26 | Liquid leakage detection device, battery module and battery pack thereof |
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| CN (1) | CN111337201A (en) |
| WO (1) | WO2021218642A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111766019A (en) * | 2020-06-29 | 2020-10-13 | 广州小鹏汽车科技有限公司 | Battery module, vehicle, detection method, and storage medium |
| WO2021218642A1 (en) * | 2020-04-26 | 2021-11-04 | 东莞塔菲尔新能源科技有限公司 | Liquid leakage detection device for battery module and battery pack |
| CN114136551A (en) * | 2021-11-26 | 2022-03-04 | 中国人民解放军国防科技大学 | Capillary principle-based leakage detection device and method |
| WO2023044647A1 (en) * | 2021-09-23 | 2023-03-30 | 宁德时代新能源科技股份有限公司 | Battery, electric device, and manufacturing method for battery |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114243130A (en) * | 2021-12-20 | 2022-03-25 | 广州小鹏汽车科技有限公司 | Battery pack leakage detection method, battery pack, vehicle and storage medium |
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| DE102005055746A1 (en) * | 2005-11-23 | 2007-05-24 | Robert Bosch Gmbh | Fluid-feeding part e.g. fuel injection valve, hydraulic leakage rate determining method for e.g. mixture-compaction externally ignited internal combustion engine, involves measuring rate by test fluid concentration and heating vapor mixture |
| EP2637772B1 (en) * | 2010-11-08 | 2017-06-28 | Aaf-McQuay Inc., D/b/a Aaf International | Eptfe filter for aseptic pharmaceutical use and method of using |
| CN206161256U (en) * | 2016-10-11 | 2017-05-10 | 天津市捷威动力工业有限公司 | Lithium ion battery package liquid cooling system weeping detection device |
| CN108448182A (en) * | 2018-04-20 | 2018-08-24 | 华霆（合肥）动力技术有限公司 | Method for detecting leakage and device |
| CN208092925U (en) * | 2018-04-26 | 2018-11-13 | 张家港康得新光电材料有限公司 | A kind of leakage detection system |
| CN111337201A (en) * | 2020-04-26 | 2020-06-26 | 江苏塔菲尔动力系统有限公司 | Liquid leakage detection device, battery module and battery pack thereof |
| CN211668715U (en) * | 2020-04-26 | 2020-10-13 | 江苏塔菲尔动力系统有限公司 | Liquid leakage detection device, battery module and battery pack thereof |
-
2020
- 2020-04-26 CN CN202010336872.0A patent/CN111337201A/en active Pending
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2021
- 2021-04-15 WO PCT/CN2021/087356 patent/WO2021218642A1/en active Application Filing
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021218642A1 (en) * | 2020-04-26 | 2021-11-04 | 东莞塔菲尔新能源科技有限公司 | Liquid leakage detection device for battery module and battery pack |
| CN111766019A (en) * | 2020-06-29 | 2020-10-13 | 广州小鹏汽车科技有限公司 | Battery module, vehicle, detection method, and storage medium |
| WO2023044647A1 (en) * | 2021-09-23 | 2023-03-30 | 宁德时代新能源科技股份有限公司 | Battery, electric device, and manufacturing method for battery |
| CN114136551A (en) * | 2021-11-26 | 2022-03-04 | 中国人民解放军国防科技大学 | Capillary principle-based leakage detection device and method |
| CN114136551B (en) * | 2021-11-26 | 2024-03-26 | 中国人民解放军国防科技大学 | Liquid leakage detection device and method based on capillary principle |
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| WO2021218642A1 (en) | 2021-11-04 |
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Effective date of registration: 20220124 Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Applicant after: Jiangsu Zhengli new energy battery technology Co.,Ltd. Address before: No.15, Huashang Road, Airport Economic Development Zone, Jiangning District, Nanjing City, Jiangsu Province Applicant before: Jiangsu Tafel Power System Co.,Ltd. Applicant before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Applicant before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. |
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