CN218788419U - Single battery and battery pack - Google Patents
Single battery and battery pack Download PDFInfo
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- CN218788419U CN218788419U CN202223171571.0U CN202223171571U CN218788419U CN 218788419 U CN218788419 U CN 218788419U CN 202223171571 U CN202223171571 U CN 202223171571U CN 218788419 U CN218788419 U CN 218788419U
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- insulating
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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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Abstract
The application provides a battery cell and battery package, wherein battery cell includes: a housing having a hollow interior to form a receiving chamber; the insulating part is arranged in the accommodating cavity, at least part of the outer surface of the insulating part and the shell are arranged at intervals to form a gap between the insulating part and the shell, and the inside of the insulating part is hollow to form the accommodating cavity; a cooling part filled in the gap; energy storage portion, locate in the holding chamber and through insulating part and cooling part isolated, the battery cell of this application is through filling the cooling part in the clearance between shell and insulating part, make the at least partial insulating part of cooling part parcel, thereby the cooling part can cool off the heat dissipation to the energy storage portion of sealing in the insulating part, and the insulating part can avoid cooling part and energy storage portion contact, avoid the energy storage portion to take place the short circuit, be favorable to improving the efficiency that the energy storage portion released the heat to the external world, avoid the heat to gather in the energy storage portion, and then be favorable to avoiding the battery cell high temperature and cause the safety problem in the course of the work.
Description
Technical Field
The application relates to the technical field of new energy, in particular to a single battery and a battery pack.
Background
The secondary battery is a high-performance battery, and has the advantages of long service life, low self-discharge rate, environmental protection, energy conservation and the like, so that the secondary battery is more and more widely applied to the fields of mobile phones, computers, energy storage, electric tools and electric automobiles in recent years.
Secondary battery can produce certain heat at the charge-discharge in-process, leads to secondary battery's temperature to rise, if secondary battery heat dispersion is not good, in case the high temperature can influence the performance of battery, and the high temperature still can lead to swelling scheduling problem moreover, shortens secondary battery's life greatly, still can lead to the emergence of conflagration or even explosion when serious, has the potential safety hazard.
Disclosure of Invention
The application provides a single battery and a battery pack to solve the problem of internal heat dissipation of a secondary battery.
In one aspect, the present application provides a battery cell comprising:
a housing having a hollow interior to form a receiving chamber;
the insulating part is arranged in the accommodating cavity, at least part of the outer surface of the insulating part and the shell are arranged at intervals to form a gap between the insulating part and the shell, and the inside of the insulating part is hollow to form an accommodating cavity;
a cooling section filled in the gap;
and the energy storage part is arranged in the accommodating cavity and is isolated from the cooling part through the insulating part.
In one possible implementation manner of the present application, the cooling portion is a liquid cooling portion, and the insulating portion is immersed in the cooling portion.
In one possible implementation manner of the present application, the housing includes:
a housing having a first opening, the housing being hollow to form the accommodating chamber, the first opening communicating with the accommodating chamber;
the top cover assembly covers the first opening, and the insulating part is connected with the top cover assembly;
the inner surface of the housing is spaced apart from the outer surface of the insulating portion to form the gap.
In one possible implementation of the present application, the insulating portion has a second opening, and the cap assembly includes:
a top cover sheet;
the lower plastic is arranged on one side, facing the shell, of the top cover plate, at least part of the lower plastic is arranged in the second opening, and the insulating part is connected with the lower plastic.
In a possible implementation manner of the present application, the lower plastic has a lateral surface, at least a portion of the lateral surface is disposed in the second opening, and the insulating portion is connected to the lateral surface.
In a possible implementation manner of the present application, the lower plastic has an inner side surface, at least a portion of the inner side surface is disposed in the second opening, and the insulating portion is connected to the inner side surface.
In one possible implementation manner of the present application, the energy storage portion includes:
a winding core;
one end of the lug part is positioned in the accommodating cavity and connected with the winding core, and the other end of the lug part is positioned outside the insulating part and connected with the shell;
and the winding core is soaked in the electrolyte.
In a possible implementation manner of the application, the top cover assembly comprises a positive pole column and a negative pole column which are arranged at intervals, and the positive pole column and the negative pole column are respectively connected with the top cover plate in an insulating manner;
the winding core comprises a positive plate, a diaphragm and a negative plate which are wound in a laminated mode, and the diaphragm is located between the positive plate and the negative plate;
the pole ear portion further includes:
one end of the positive lug is positioned in the accommodating cavity and connected with the positive plate, and the other end of the positive lug is positioned outside the insulating part and connected with the positive post;
and one end of the negative electrode lug is positioned in the accommodating cavity and connected with the negative electrode piece, and the other end of the negative electrode lug is positioned outside the insulating part and connected with the negative electrode post.
In one possible implementation manner of the present application, the cooling portion is an insulating cooling portion, and the material of the cooling portion includes at least one of silicone oil, mineral oil, an electronic fluorinated liquid, and a decafluoropentane cooling liquid.
In another aspect, the present application further provides a battery pack, including:
a box body;
and the single battery is accommodated in the box body and is the single battery.
The utility model provides a pair of battery cell and battery package, through set up the insulating part inside the shell, arrange the holding chamber of insulating part in with energy storage portion, the sealed energy storage portion of insulating part to pack the cooling part in the clearance between shell and insulating part, make the cooling part parcel is at least partial the insulating part to the cooling part can cool off the heat dissipation to the energy storage portion sealed in the insulating part, and the insulating part can avoid cooling part and energy storage portion to contact moreover, avoids energy storage portion to take place the short circuit, thereby is favorable to improving the efficiency that energy storage portion released the heat to the external world, avoids the heat to gather in the energy storage portion, and then is favorable to avoiding battery cell high temperature and cause the safety problem in the course of the work.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic perspective view of a single battery provided in an embodiment of the present application.
Fig. 2 isbase:Sub>A schematic cross-sectional view taken along linebase:Sub>A-base:Sub>A' in fig. 1 according to an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of a single battery provided in an embodiment of the present application.
Fig. 4 is a schematic cross-sectional view of a single battery according to an embodiment of the present disclosure.
Fig. 5 is a schematic structural diagram of a winding core of a single battery provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all 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.
In the description of the present application, it is to be understood that the features of the terms "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. It is to be understood that, unless otherwise expressly stated or limited, the terms "connected" and "connecting" are used broadly and can refer to, for example, a direct connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Further, the present application may repeat reference numerals and/or reference letters in the various examples for simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or arrangements discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The embodiment of the application provides a single battery and a battery pack, which are respectively described in detail below.
Referring to fig. 1 to 5, an embodiment of the present invention provides a single battery including a housing 10, an insulating part 30, a cooling part 40, and an energy storage part 20.
The inner part of the shell 10 is hollow to form a containing cavity 101, the insulating part 30 is arranged in the containing cavity 101, at least part of the outer surface 31 of the insulating part 30 and the shell 10 are arranged at intervals to form a gap 102 between the insulating part 30 and the shell 10, the inner part of the insulating part 30 is hollow to form a containing cavity 301, the energy storage part 20 is arranged in the containing cavity 301, and the cooling part 40 is filled in the gap 102, so that the cooling part 40 can absorb heat generated when the energy storage part 20 works to cool and radiate the energy storage part 20. The cooling unit 40 in the embodiment of the present application may be a liquid cooling unit 40 or a solid cooling unit 40, which is not particularly limited in the embodiment of the present application.
Specifically, in the embodiment of the present application, the insulating portion 30 may be a bag-shaped structure made of a thin film material, and may also be a cylindrical shell-shaped structure or a square shell-shaped structure, and the embodiment of the present application is not limited to a specific shape of the insulating portion 30. The insulating portion 30 is made of an aluminum-plastic film, which has a middle portion made of aluminum foil and a composite film of Polyethylene (PE) and Polypropylene (PP) films disposed on two sides of the aluminum-plastic film. Because the aluminum-plastic film has good barrier property, the aluminum-plastic film is used as the sealing insulating film in the embodiment of the application, so that the puncture resistance, the electrolyte resistance 22, the coolant resistance stability and other advantages of the aluminum-plastic film can be utilized to improve the puncture resistance, the electrolyte resistance 22, the coolant resistance stability and other properties of the single battery.
Of course, the insulating part 30 of the embodiment of the present application may be made of any material such as polyethylene and polypropylene, and is not particularly limited herein.
The single battery of the embodiment of the application arranges the energy storage part 20 in the accommodating cavity 301 of the insulating part 30 through the insulating part 30 arranged inside the shell 10, the insulating part 30 seals the energy storage part 20, and fills the cooling part 40 in the gap 102 between the shell 10 and the insulating part 30, so that the cooling part 40 wraps at least part of the insulating part 30, thereby the cooling part 40 can cool and radiate the energy storage part 20 sealed in the insulating part 30, the insulating part 30 can avoid the contact of the cooling part 40 and the energy storage part 20, and the short circuit of the energy storage part 20 is avoided, thereby being beneficial to improving the efficiency of the energy storage part 20 for releasing heat to the outside, avoiding the heat to accumulate in the energy storage part 20, and further being beneficial to avoiding the single battery from causing safety problems due to overhigh temperature in the working process.
In some embodiments, the cooling portion 40 is a liquid cooling portion 40, and the insulating portion 30 is immersed in the cooling portion 40. This application embodiment is through setting up cooling portion 40 into liquid cooling portion 40 for insulating part 30 soaks in cooling portion 40, thereby liquid cooling portion 40 is more even with the area of contact of energy storage portion 20, thereby is favorable to liquid cooling portion 40 to carry out even cooling heat dissipation to energy storage portion 20, is favorable to improving the radiating effect.
In the present embodiment, the insulating portion 30 is immersed in the cooling portion 40, and it is understood that some portions of the insulating portion 30 are immersed in the cooling portion 40, and other portions are not exposed to the outside in contact with the cooling portion 40, or it is understood that all portions of the insulating portion 30 are immersed in the cooling portion 40, which is not limited herein.
It should be noted that, in other embodiments, the cooling portion 40 may also be the solid cooling portion 40, and exemplarily, the solid cooling portion 40 may be made of a metal halide perovskite material, generally speaking, the metal halide perovskite material is composed of long flexible molecular chains, is disordered, and is a soft material, but under pressure, the material of the metal halide perovskite material may be hardened and changed into a more ordered state, in the process, heat is released, and when pressure is released, the metal halide perovskite material may absorb heat from the surrounding environment again, so as to achieve a cooling effect, in a manner substantially the same as those of the material switched between the liquid state and the gas state, except that the metal halide perovskite material is solid in both forms.
In some embodiments, cooling portion 40 is an insulating cooling portion 40, and insulating cooling portion 40 has the inert characteristics of insulation and non-combustion, which is beneficial for meeting the heat dissipation requirement. In the embodiment of the present application, the material of the cooling portion 40 includes at least one of silicone oil, mineral oil, an electron fluoride liquid, and a decafluoropentane cooling liquid.
In some embodiments, as shown in fig. 2, the housing 10 includes a shell 11 and a cap assembly 12. The housing 11 of the embodiment of the present application is a metal shell, and exemplarily, the housing 11 may be an aluminum shell, an iron shell, or the like, and the design of the housing 11 in the shape includes, but is not limited to, a cube, a rectangular parallelepiped, a cylinder, or the like. Wherein the housing 11 has a first opening 103 and the insulation 30 is located in the housing 11. The housing 11 is hollow to form an accommodating cavity 101, the first opening 103 is communicated with the accommodating cavity 101, the top cover assembly 12 covers the first opening 103, and the insulating part 30 is connected with the top cover assembly 12. Specifically, the cooling portion 40 may be inserted into the receiving cavity 101 of the housing 11 through the first opening 103. Illustratively, the cooling portion 40 is made of a liquid cooling material, which can be injected into the accommodating chamber 101 of the housing 11 through the first opening 103.
In some embodiments, the inner surface 111 of the housing 11 is spaced apart from the outer surface 31 of the insulation 30 to form the gap 102. The gap 102 may be a continuous gap, so as to ensure that there is no contact or connection between the inner surface 111 of the housing 11 and the outer surface 31 of the insulating part 30. According to the embodiment of the application, the gap 102 is formed between the insulating part 30 and the shell 10, and the cooling part 40 is filled in the gap 102, so that the contact area between the insulating part 30 and the cooling part 40 can be increased, the outer surface 31 of the insulating part 30 located in the shell 11 can be completely contacted with the cooling part 40, the heat exchange efficiency between the cooling part 40 and the energy storage part 20 can be improved, and the cooling part 40 can achieve the effect of uniform heat dissipation.
In some embodiments, as shown in fig. 3, the insulating portion 30 has a second opening 302, and the top cover assembly 12 includes a top cover sheet 121 and a lower plastic 122.
The lower plastic 122 is disposed on one side of the top cover 121 facing the housing 11, and the insulating portion 30 is connected to the lower plastic 122, so that the insulating portion 30 can be fixed on the top cover assembly 12, and the cooling portion 40 is sealed in the insulating portion 30. Specifically, the insulating portion 30 and the lower plastic 122 are made of a plastic material, so that the insulating portion 30 and the lower plastic 122 can be connected by a hot melting process. Of course, the insulation part 30 and the lower plastic 122 may be connected by an adhesive process, and is not limited in this regard.
In some embodiments, as shown in fig. 2 and the drawings, the lower plastic 122 has an outer side surface 1221, the outer side surface 1221 is at least partially disposed in the second opening 302, and the insulating portion 30 is connected to the outer side surface 1221. Specifically, the insulation part 30 and the outer side surface 1221 of the lower plastic 122 may be connected by heat fusion or adhesive. This application embodiment is connected through lateral surface 1221 with insulating part 30 and lower plastic 122 to can play the inside sealing connection effect of insulating part 30, avoid the electrolyte 22 in the insulating part 30 to leak or the material of cooling part 40 gets into in the insulating part 30 via lower plastic 122, lead to the material intermixing of cooling part 40 and energy storage part 20, be favorable to avoiding energy storage part 20 to be polluted or the short circuit.
In some embodiments, as shown in fig. 3 and 4, the lower plastic 122 has an inner side 1222, the inner side 1222 is at least partially disposed in the second opening 302, and the insulating portion 30 is connected to the inner side 1222. Specifically, the insulation portion 30 and the inner side 1222 of the lower plastic 122 may be connected by thermal fusion or adhesive. This application embodiment is connected through medial surface 1222 with insulating part 30 and lower plastic 122 to can play the inside sealing connection effect of insulating part 30, be favorable to avoiding energy storage portion 20 to be polluted or the short circuit.
In some embodiments, as shown in fig. 1, energy storage portion 20 includes a jellyroll 21, an ear 50, and an electrolyte 22. One end of the tab portion 50 is located in the accommodating cavity 301 and connected to the winding core 21, and the other end of the tab portion 50 is located outside the insulating portion 30 and connected to the housing 10. Specifically, the pole ear portion 50 is connected with the top cover assembly 12 of the housing 10, and one end of the pole ear portion 50 is arranged outside the insulating portion 30 and connected with the housing 10 in the embodiment of the present application, so that the electric device or the connecting device such as a bus bar can be electrically connected with the single battery through the pole ear portion 50, and the single battery can be discharged or charged.
The winding core 21 of the embodiment of the present application is immersed in the electrolyte 22. In the embodiment of the present application, the top cover assembly 12 is provided with a liquid injection hole 104, and the electrolyte 22 can be injected into the case 11 through the liquid injection hole 104.
In some embodiments, as shown in fig. 3 and 5, the top cover assembly 12 further includes a positive post 131 and a negative post 132 disposed at an interval, wherein the positive post 131 and the negative post 132 are respectively connected to the top cover sheet 121 in an insulating manner through an insulating structure. The insulating structure may be an insulating pad, an insulating washer, or the like, which is not particularly limited herein.
The winding core 21 includes a positive electrode sheet 211, a separator 212, and a negative electrode sheet 213 that are layered and wound, and the separator 212 is located between the positive electrode sheet 211 and the negative electrode sheet 213.
In the embodiment of the present application, the assembly process of the unit cell is as follows:
s1, assembling a diaphragm 212, a negative plate 213 and a positive plate 211 in a lamination or winding mode to form a winding core 21;
s2, connecting the winding core 21 with the top cover assembly 12 of the shell 10, so that the positive tab 51 and the positive post 131 are connected, and the negative tab 52 and the negative post 132 are connected through a laser welding process respectively;
s3, the winding core 21 is arranged in the insulating part 30 through the first opening 103 of the insulating part 30, and the insulating part 30 is connected with the top cover assembly 12 through a hot melting process to seal the insulating part 30;
s4, injecting the cooling part 40 into the shell 11 through the second opening 302 of the shell 11;
s5, the winding core 21 connected with the top cover assembly 12 is installed in the shell 11 passing through the second opening 302, so that the insulating part 30 is soaked in the cooling part 40, and in the embodiment of the application, the cooling part 40 does not exceed the edge, close to the top cover assembly 12, of the insulating part 30;
s6, the top cover assembly 12 and the shell 10 are hermetically connected through a laser welding process;
s7, drying the winding core 21, and adding the electrolyte 22 through the electrolyte injection hole 104 on the top cover assembly 12 to ensure that the electrolyte 22 is sealed in the insulating part 30 and is not mixed with the cooling part 40 outside the insulating part 30;
and S8, welding and sealing the liquid injection port through a laser welding process.
On the other hand, this application still provides a battery package, includes box and battery cell. Wherein, the single battery is accommodated in the box body. The single battery is the single battery.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments. In a specific implementation, each unit or structure may be implemented as an independent entity, or may be combined arbitrarily to be implemented as one or several entities, and the specific implementation of each unit or structure may refer to the foregoing method embodiment, which is not described herein again.
The above detailed description is given to the single battery and the battery pack provided in the embodiment of the present application, and a specific example is applied in the detailed description to explain the principle and the implementation manner of the embodiment of the present application, and the description of the embodiment is only used to help understanding the technical solution and the core idea of the embodiment of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A battery cell, comprising:
a housing (10) which is hollow inside to form a housing chamber (101);
the insulation part (30) is arranged in the accommodating cavity (101), at least part of the outer surface (31) of the insulation part (30) is arranged at a distance from the shell (10) to form a gap (102) between the insulation part (30) and the shell, and the insulation part (30) is hollow inside to form an accommodating cavity (301);
a cooling section (40) filled in the gap (102);
and the energy storage part (20) is arranged in the accommodating cavity (301) and is isolated from the cooling part through the insulating part.
2. The battery cell according to claim 1, wherein the cooling portion (40) is a liquid cooling portion, and the insulating portion (30) is immersed in the cooling portion (40).
3. The cell according to claim 1, characterised in that the casing (10) comprises:
a housing (11) having a first opening (103), the housing (11) being hollow inside to constitute the accommodation chamber (101), the first opening (103) communicating with the accommodation chamber (101);
a top cover assembly (12) covering the first opening (103), wherein the insulating part (30) is connected with the top cover assembly (12);
an inner surface (111) of the housing (11) is spaced from an outer surface (31) of the insulating portion (30) to form the gap (102).
4. The cell according to claim 3, wherein the insulating portion (30) has a second opening (302), and the top cap assembly (12) comprises:
a top flap (121);
the lower plastic (122) is arranged on one side, facing the shell (11), of the top cover sheet (121), at least part of the lower plastic (122) is arranged in the second opening (302), and the insulating part (30) is connected with the lower plastic (122).
5. The cell according to claim 4, wherein the lower plastic (122) has an outer side surface (1221), the outer side surface (1221) being at least partially disposed within the second opening (302), the insulating portion (30) being connected to the outer side surface (1221).
6. The cell according to claim 4, wherein the lower plastic (122) has an inner side (1222), the inner side (1222) being at least partially disposed within the second opening (302), the insulation (30) being connected to the inner side (1222).
7. The battery cell according to claim 4, wherein the energy storage portion (20) includes:
a winding core (21);
one end of the lug part (50) is positioned in the accommodating cavity (301) and connected with the winding core (21), and the other end of the lug part is positioned outside the insulating part (30) and connected with the shell (10);
and the winding core (21) is soaked in the electrolyte (22).
8. The single battery according to claim 7, wherein the top cover component (12) further comprises a positive post (131) and a negative post (132) which are arranged at intervals, and the positive post (131) and the negative post (132) are respectively connected with the top cover sheet (121) in an insulation manner;
the winding core (21) comprises a positive electrode sheet (211), a diaphragm (212) and a negative electrode sheet (213) which are wound in a laminated manner, wherein the diaphragm (212) is positioned between the positive electrode sheet (211) and the negative electrode sheet (213);
the pole ear (50) further comprises:
one end of the positive lug (51) is positioned in the accommodating cavity (301) and is connected with the positive plate (211), and the other end of the positive lug is positioned outside the insulating part (30) and is connected with the positive post (131);
and one end of the negative electrode lug (52) is positioned in the accommodating cavity (301) and connected with the negative electrode sheet (213), and the other end of the negative electrode lug is positioned outside the insulating part (30) and connected with the negative electrode post (132).
9. The battery cell according to any one of claims 1 to 7, wherein the cooling portion (40) is an insulating cooling portion, and the material of the cooling portion (40) includes at least one of silicone oil, mineral oil, an electron fluoride solution, and a decafluoropentane cooling solution.
10. A battery pack, comprising:
a box body;
the single battery is accommodated in the box body, and the single battery is the single battery in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223171571.0U CN218788419U (en) | 2022-11-28 | 2022-11-28 | Single battery and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223171571.0U CN218788419U (en) | 2022-11-28 | 2022-11-28 | Single battery and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218788419U true CN218788419U (en) | 2023-04-04 |
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ID=86504906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223171571.0U Active CN218788419U (en) | 2022-11-28 | 2022-11-28 | Single battery and battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218788419U (en) |
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2022
- 2022-11-28 CN CN202223171571.0U patent/CN218788419U/en active Active
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Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518107 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |