CN213601913U - Battery module - Google Patents
Battery module Download PDFInfo
- Publication number
- CN213601913U CN213601913U CN202021774743.1U CN202021774743U CN213601913U CN 213601913 U CN213601913 U CN 213601913U CN 202021774743 U CN202021774743 U CN 202021774743U CN 213601913 U CN213601913 U CN 213601913U
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- Prior art keywords
- heat
- film
- battery
- battery module
- heat conduction
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- 239000012790 adhesive layer Substances 0.000 claims abstract description 24
- 239000012528 membrane Substances 0.000 claims abstract description 19
- 239000000853 adhesive Substances 0.000 claims abstract description 5
- 230000001070 adhesive effect Effects 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 239000004519 grease Substances 0.000 claims description 12
- 229920001296 polysiloxane Polymers 0.000 claims description 12
- 230000000694 effects Effects 0.000 abstract description 12
- 230000007774 longterm Effects 0.000 abstract description 5
- 230000017525 heat dissipation Effects 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 239000012782 phase change material Substances 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 229910021393 carbon nanotube Inorganic materials 0.000 description 3
- 239000002041 carbon nanotube Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229920000126 latex Polymers 0.000 description 3
- 239000004816 latex Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 229910021382 natural graphite Inorganic materials 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- QHZOMAXECYYXGP-UHFFFAOYSA-N ethene;prop-2-enoic acid Chemical compound C=C.OC(=O)C=C QHZOMAXECYYXGP-UHFFFAOYSA-N 0.000 description 2
- 229920006226 ethylene-acrylic acid Polymers 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910021392 nanocarbon Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
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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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- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model belongs to the battery field discloses a battery module, include: a battery assembly comprising a plurality of battery cells (1); the heat conducting film (2) at least comprises an outer heat conducting film (21), and the outer heat conducting film (21) covers at least part of the outer wall surface of the battery assembly; and the heat conduction adhesive layer (3) is coated on the film surface of the heat conduction film (2) and is used for sealing and adhering the heat conduction film (2) and the battery assembly. The utility model discloses a battery module covers outer heat conduction membrane on the at least partial outer wall of battery assembly under the sealed bonding effect of heat conduction adhesive linkage, makes the heat that the battery produced arrange outside fast under the heat conduction effect of heat conduction adhesive linkage and outer heat conduction membrane, promotes the radiating effect, and because heat conduction membrane has frivolous structure, reduces the volume of battery module greatly, so the utility model discloses a battery module is suitable for long-term and commercial use.
Description
Technical Field
The utility model relates to a battery technology field specifically, relates to a battery module.
Background
The existing power battery radiating structure mostly adopts a water-cooling radiator or a phase-change material radiator. The water-cooled radiator needs an external power supply and the design and use of the water-cooled tank cause the volume of the power battery to be larger. The phase change material radiator also has a large volume due to the need of an additional phase change material container, and the phase change material itself has a liquid leakage risk. Therefore, the existing water-cooled radiator and the phase-change material radiator are not suitable for long-term and commercial use.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned defect or not enough of prior art, the utility model provides a battery module can reduce the volume and promote the radiating effect to be suitable for long-term and commercial use.
In order to achieve the above object, the utility model provides a battery module, battery module includes:
a battery assembly including a plurality of battery cells;
the heat conducting film at least comprises an outer heat conducting film, and the outer heat conducting film is covered on at least part of the outer wall surface of the battery assembly; and
and the heat conduction adhesive layer is coated on the membrane surface of the heat conduction membrane and is used for sealing and bonding the heat conduction membrane and the battery assembly.
Optionally, the outer heat conducting film covers an outer wall surface of the battery assembly.
Optionally, the heat conducting film further comprises an inner heat conducting film, and the inner heat conducting film is arranged between at least part of the adjacent battery units.
Optionally, the inner heat conducting film is arranged between each two adjacent battery units.
Optionally, the thermally conductive membrane is a flexible thermally conductive membrane that is bendable.
Optionally, the heat conducting film further comprises an inner heat conducting film, the inner heat conducting film is arranged between at least part of the adjacent battery units, and the outer heat conducting film and the inner heat conducting film are integrally formed.
Optionally, the heat conducting film is a copolymer of at least two of natural graphite, high heat conducting carbon powder, expanded graphite, carbon nanotubes, conductive carbon black, SBR latex, ethylene propylene diene monomer rubber, and ethylene acrylic acid.
Optionally, the thermal conductivity of the heat conducting film in the direction extending along the film surface is 150W/mK to 400W/mK; and/or the thermal conductivity of the heat conduction membrane in the direction vertical to the membrane surface is 5W/mK to 20W/mK; and/or the thickness of the heat conduction film is 0.1mm to 1 mm.
Optionally, the heat-conducting adhesive layer is a heat-conducting paste or a heat-conducting glue, and the heat-conducting paste is a heat-conducting silicone grease, a heat-conducting silicone grease added with nano carbon, a heat-conducting silicone grease added with nano silver, a heat-conducting silicone grease added with nano copper, or a heat-conducting silicone grease added with nano aluminum oxide.
Optionally, the thermal conductivity of the heat-conducting adhesive layer is 3W/mK to 10W/mK; and/or the coating thickness of the heat-conducting adhesive layer is 10-200 μm.
The utility model discloses an among the battery module, through the sealed bonding effect of heat conduction adhesive linkage, can cover outer heat conduction membrane on the at least partial outer wall of battery assembly, the heat that the battery produced can be arranged outside fast under the heat conduction effect of heat conduction adhesive linkage and outer heat conduction membrane to promote the radiating effect. In addition, the heat-conducting film has a light and thin structure, so that the volume of the battery module can be greatly reduced. Therefore, the battery module of the utility model is suitable for long-term and commercial use.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of a battery module according to an embodiment of the present invention.
Description of reference numerals:
100 battery module
1 cell 2 Heat conducting Membrane
3 Heat-conducting adhesive layer
21 outer heat conducting film 22 inner heat conducting film
Detailed Description
The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the description herein is only intended to illustrate and explain embodiments of the present invention, and is not intended to limit embodiments of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the embodiments of the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, top, bottom" and "upper" are generally used with respect to the orientation shown in the drawings or the positional relationship of the components with respect to each other in the vertical, vertical or gravitational direction.
The invention will be described in detail below with reference to the accompanying drawings in conjunction with exemplary embodiments.
As shown in fig. 1, the present invention provides a battery module 100 according to an exemplary embodiment, and the battery module 100 includes a battery assembly, a thermal conductive film 2, and a thermal conductive adhesive layer 3. Where the battery assembly includes a plurality of battery cells 1, the plurality of battery cells 1 may be arranged in a variety of different arrangements, such as laterally side by side in the illustration or in a stacked manner (e.g., sheet-like battery cells may be arranged in this manner), etc., and the present exemplary embodiment is not limited thereto. When a plurality of battery units 1 are arranged in a certain manner, the battery units 1 in the edge area jointly define the outer wall surface of the battery assembly, and the heat-conducting film 2 at least comprises an outer heat-conducting film 21, and the outer heat-conducting film 21 covers at least part of the outer wall surface of the battery assembly. In addition, the heat-conducting adhesive layer 3 has good viscosity and heat conductivity, the heat-conducting adhesive layer is coated on the film surface of the heat-conducting film 2 to be in sealing adhesion with the battery assembly, so that the heat-conducting film 2 is firmly covered on at least part of the outer wall surface of the battery assembly, and due to the sealing adhesion, the heat is only transferred between the outer wall surface covered with the heat-conducting film 2 and the heat-conducting film 2 through the heat-conducting adhesive layer 3, and the influence of an air layer with larger heat resistance on the heat dissipation effect can be avoided.
Therefore, when the battery assembly generates heat in the using process, the heat dissipation effect on the outer wall surface covered with the heat conduction adhesive layer 3 and the heat conduction film 2 is better, namely, the heat can be quickly discharged through the heat conduction adhesive layer 3 and the heat conduction film 2 with high heat conductivity in sequence, so that the heat dissipation efficiency is improved. And because the heat conduction membrane 2 has a light and thin structure, compared with the existing water-cooling radiator or phase-change material radiator with a larger volume of the heat dissipation structure, the whole volume of the battery module 100 can be greatly reduced, the battery module 100 is easy to produce, install and use, the liquid leakage phenomenon existing in the phase-change material radiator can not occur, the reliability is higher, and the heat conduction membrane is suitable for long-term and commercial use.
When the covering surface of the outer heat conducting film 21 is larger, the heat dissipation speed of the battery assembly is obviously improved. Therefore, the outer heat-conducting film 21 is preferably arranged to completely cover the outer wall surface of the battery assembly, so that heat on each area of the outer wall surface can be rapidly discharged. Meanwhile, the outer heat-conducting film 21 completely covering the battery assembly plays a role in protecting the battery assembly to a certain extent, can prevent external liquid, dust and the like from corroding or polluting, improves the reliability of the battery assembly and prolongs the service life of the battery assembly.
In order to further enlarge the coverage area of the thermal conductive film 21 and achieve a wider range of efficient heat conduction and dissipation, an inner thermal conductive film 22 may be disposed in the battery module 100, and the inner thermal conductive film 22 is a part of the thermal conductive film 2 and is disposed between at least some adjacent battery cells 1. Specifically, the thermally conductive adhesive layers 3 are coated on both film surfaces of the inner thermally conductive film 22, so that both sides form a hermetic bond with the adjacent battery cells 1, respectively. With this arrangement, it is possible to eliminate air gaps between adjacent battery cells 1 and to uniformly disperse and conduct heat on the inner heat conductive film 22, thereby preventing local overheating on the battery cells 1. It is preferable that the inner and outer thermal conductive films 22 and 21 are connected to each other to rapidly conduct heat to the outer thermal conductive film 21, thereby rapidly discharging heat, which is otherwise difficult to be discharged from between the plurality of battery cells 1, to the outside. In other words, the heat dissipation efficiency is further improved by the heat transfer and heat equalization action of the inner heat conductive film 22.
More preferably, the inner thermal conductive film 22 may be disposed between each of the adjacent battery cells 1. On the basis, if the outer heat-conducting film 21 completely covers the outer wall surface of the battery assembly, it is equivalent to make the heat-conducting film 2 completely cover each battery unit 1 in the battery assembly, so that each battery unit 1 can obtain excellent heat-equalizing, heat-transferring and heat-dissipating effects, and thus the battery module 100 obtains excellent heat-dissipating effects.
In order to facilitate the production of the battery module 100 and to make the heat conductive film 2 suitable for laminating and covering the battery assembly, the heat conductive film 2 may be provided as a bendable flexible heat conductive film. In actual production, even to the battery unit 1 that arranges with different arrangement, through the adaptation of buckling of flexible heat conduction membrane 2, can guarantee all the time that heat conduction membrane 2 is to battery assembly's good parcel nature and laminating degree to avoid leaving the clearance and form the air bed between the battery unit 1 better, thereby guarantee thermal quick conduction and outer the loosing.
Preferably, in the case where the battery module 100 is provided with the inner thermal conductive film 22 and the outer thermal conductive film 21 are connected to each other, the outer thermal conductive film 21 and the inner thermal conductive film 22 may be provided as an integrally molded structure. In other words, in actual production, in the process of wrapping the heat-conducting film 2 on the battery assembly, the heat-conducting film 2 is not cut in a continuous wrapping mode before the wrapping is completed, so that the wrapping efficiency can be improved, the heat conductivities of the outer heat-conducting film 21, the inner heat-conducting film 22 and the outer heat-conducting film 21 and the inner heat-conducting film 22 can be ensured to be consistent, and the heat-conducting film 2 is ensured to have better soaking, heat transfer and heat dissipation performance.
For different types of batteries, the heat conductive film 2 having different materials, different shapes, different thicknesses, etc. may be used to obtain different heat dissipation effects. For example, the heat conductive film 2 may be a copolymer of at least two or more of natural graphite, highly heat conductive carbon powder, expanded graphite, carbon nanotubes, conductive carbon black, SBR latex, ethylene propylene diene monomer, and ethylene acrylic acid. Alternatively, a thermally conductive film 2 having a thermal conductivity of 150W/mK to 400W/mK in a direction extending along the film surface or 5W/mK to 20W/mK in a direction perpendicular to the film surface may be used. As can be seen from the foregoing, the heat conductive film 2 has a light and thin structure, and for example, the heat conductive film 2 with a thickness of 0.1mm to 1mm may be used.
In addition, the thermally conductive adhesive layer 3 having a different material, a different coating thickness, or the like may also be used. For example, the heat conductive adhesive layer 3 may be a heat conductive paste or a heat conductive paste. The heat conducting paste can be heat conducting silicone grease, heat conducting silicone grease added with nano carbon, heat conducting silicone grease added with nano silver, heat conducting silicone grease added with nano copper or heat conducting silicone grease added with nano aluminum oxide, or a heat conducting adhesive layer 3 with heat conductivity of 3W/mK to 10W/mK can be adopted, or a heat conducting adhesive layer 3 with a coating thickness of 10 mu m to 200 mu m can be adopted, and preferably, the heat conducting adhesive layer 3 is uniformly coated between the heat conducting film 2 and the battery unit 1, namely, the coating thickness is consistent.
Comparative experiments in which example, comparative example 1, and comparative example 2 were separately provided to demonstrate that the battery module 100 of the present exemplary embodiment has better heat dissipation performance are provided below.
In the embodiment, by adopting the battery module 100, the battery assembly is formed by connecting three lithium ion soft package power batteries with rated voltage of 1.6V and rated current of 20A in parallel, the heat conduction film 2 is a flexible heat conduction film and completely covers each battery unit 1, and the heat conduction bonding layer 3 is uniformly coated between the heat conduction film 2 and the battery unit 1. The heat-conducting film 2 is a copolymer of natural graphite, high-heat-conductivity carbon powder, expanded graphite, carbon nano tubes, conductive carbon black and SBR latex, the film thickness is 0.2mm, and the heat-conducting adhesive layer 3 is made of a heat-conducting silicone grease material and has the thickness of 0.01 mm.
In comparative example 1, the same cell assembly as in the cell module 100 was used, but the heat conductive film 2 and the heat conductive adhesive layer 3 were not provided, and the cell assembly was wrapped with a copper core aluminum heat sink having a thickness of 0.2mm, and other experimental conditions were the same as in the example.
In comparative example 2, the same battery assembly as in the battery module 100 was used, but no additional heat dissipation structure was provided, and other experimental conditions were the same as in example and comparative example 1.
In the experiment, the battery assemblies in the example, the comparative example 1 and the comparative example 2 were respectively subjected to charge and discharge tests, specifically, charging with a current of 20A and discharging with a current of 40A, and the surface temperature change of the battery was measured by thermocouples in the inside of the battery assembly and on the outer surface of the battery assembly, taking the stable temperature as the recording temperature.
The experimental results are referred to the following table:
| radiator type | Flexible heat-conducting film | Copper core aluminium radiator | Non-heat dissipation structure |
| Surface temperature (. degree. C.) of battery | 42 | 45 | 66 |
Therefore, in the experiment, the surface temperature of the battery can be reduced by 3 ℃, and the flexible heat-conducting film has the advantages of smaller volume, lighter weight, lower cost and the like compared with the existing copper core aluminum radiator.
The above describes in detail optional implementation manners of embodiments of the present invention with reference to the accompanying drawings, however, the embodiments of the present invention are not limited to the details in the above implementation manners, and in the technical concept scope of the embodiments of the present invention, it is possible to perform various simple modifications on the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that, in the above-mentioned embodiments, the various technical features described in the above-mentioned embodiments can be combined in any suitable way without contradiction, and in order to avoid unnecessary repetition, the embodiments of the present invention do not separately describe various possible combinations.
In addition, various different implementation manners of the embodiments of the present invention can be combined arbitrarily, and as long as it does not violate the idea of the embodiments of the present invention, it should be considered as the disclosure of the embodiments of the present invention.
Claims (9)
1. A battery module, characterized in that the battery module (100) comprises:
a battery assembly comprising a plurality of battery cells (1);
the heat conducting film (2) at least comprises an outer heat conducting film (21), and the outer heat conducting film (21) covers at least part of the outer wall surface of the battery assembly; and
and the heat conduction adhesive layer (3) is coated on the film surface of the heat conduction film (2) and is used for sealing and adhering the heat conduction film (2) and the battery assembly.
2. The battery module according to claim 1, wherein the outer heat conductive film (21) covers an outer wall surface of the battery assembly.
3. The battery module according to claim 1, wherein the thermal conductive film (2) further comprises an inner thermal conductive film (22), and the inner thermal conductive film (22) is provided between at least some of the adjacent battery cells (1).
4. The battery module according to claim 3, wherein the inner heat conductive film (22) is provided between the adjacent battery cells (1).
5. The battery module according to claim 1, wherein the heat conductive film (2) is a flexible heat conductive film that can be bent.
6. The battery module according to claim 5, wherein the thermal conductive film (2) further comprises an inner thermal conductive film (22), the inner thermal conductive film (22) is provided between at least some of the adjacent battery cells (1), and the outer thermal conductive film (21) and the inner thermal conductive film (22) are integrally formed.
7. The battery module according to claim 1, wherein the thermal conductivity of the thermal conductive film (2) in the direction extending along the film surface is 150W/mK to 400W/mK; and/or the thermal conductivity of the heat conduction membrane (2) along the direction vertical to the membrane surface is 5W/mK to 20W/mK; and/or the thickness of the heat conducting film (2) is 0.1mm to 1 mm.
8. The battery module according to claim 1, wherein the heat-conducting adhesive layer (3) is a heat-conducting paste or a heat-conducting adhesive, and the heat-conducting paste is a heat-conducting silicone grease.
9. The battery module according to claim 1, wherein the thermal conductivity of the thermally conductive adhesive layer (3) is 3W/mK to 10W/mK; and/or the heat-conducting adhesive layer (3) is coated to a thickness of 10 to 200 [ mu ] m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021774743.1U CN213601913U (en) | 2020-08-21 | 2020-08-21 | Battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021774743.1U CN213601913U (en) | 2020-08-21 | 2020-08-21 | Battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213601913U true CN213601913U (en) | 2021-07-02 |
Family
ID=76585513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021774743.1U Active CN213601913U (en) | 2020-08-21 | 2020-08-21 | Battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213601913U (en) |
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2020
- 2020-08-21 CN CN202021774743.1U patent/CN213601913U/en active Active
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Effective date of registration: 20231214 Address after: 102211 Shenhua Low Carbon 001 Mailbox, Naukograd, Changping District, Beijing Patentee after: Beijing low carbon clean energy Research Institute Address before: 100011 Beijing Dongcheng District, West Binhe Road, No. 22 Patentee before: CHINA ENERGY INVESTMENT Corp.,Ltd. Patentee before: Beijing low carbon clean energy Research Institute |