CN213340510U - Buffer heat insulation pad between modules and battery pack thereof - Google Patents
Buffer heat insulation pad between modules and battery pack thereof Download PDFInfo
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- CN213340510U CN213340510U CN202022368655.8U CN202022368655U CN213340510U CN 213340510 U CN213340510 U CN 213340510U CN 202022368655 U CN202022368655 U CN 202022368655U CN 213340510 U CN213340510 U CN 213340510U
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- heat insulation
- packaging
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- buffer
- module
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- 238000009413 insulation Methods 0.000 title claims abstract description 69
- 230000003139 buffering effect Effects 0.000 claims abstract description 40
- 238000004806 packaging method and process Methods 0.000 claims description 38
- 238000009434 installation Methods 0.000 claims description 26
- 238000003780 insertion Methods 0.000 claims description 19
- 230000037431 insertion Effects 0.000 claims description 19
- 238000003825 pressing Methods 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 238000005538 encapsulation Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- 239000000741 silica gel Substances 0.000 description 5
- 229910002027 silica gel Inorganic materials 0.000 description 5
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 3
- 239000004964 aerogel Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000003063 flame retardant Substances 0.000 description 3
- 238000011900 installation process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Images
Classifications
-
- 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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- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The utility model aims at solving the problem that the thermal runaway influence of a single battery module in the existing battery pack spreads to other battery modules in the battery pack, and discloses a buffer heat insulation pad between modules and a battery pack thereof, wherein the buffer heat insulation sheet consists of an encapsulation layer and a buffer heat insulation group layer, and the buffer heat insulation group layer is encapsulated on two sides of the encapsulation layer; the positioning clamping pieces are used for clamping the buffering heat insulation pieces at two ends, and the buffering heat insulation pieces are arranged between the two adjacent battery modules through the two ends.
Description
Technical Field
The utility model relates to a power battery technical field especially relates to a buffering heat insulating mattress between module and battery package thereof.
Background
The nation vigorously develops new energy, various electric vehicles gradually enter the market, and the alternative fuel vehicle becomes the mainstream of future vehicles in the future. It is well known that the range and charging convenience of an electric vehicle are early problems, but at present, the safety of a battery pack is more critical.
The currently used battery pack includes at least one or more battery modules installed in a regular arrangement, and each battery module generally includes a plurality of batteries arranged side by side and a buffer heat insulation pad respectively located at two ends of each of the plurality of batteries; the existing battery pack mainly has the following problems in the using process:
1) inside battery module was arranged in to the overwhelming majority of buffering heat insulating mattress, was located between electric core and the electric core, considered not enough to buffering and the thermal runaway safeguard measure between the battery module.
2) The structure of buffering heat insulating mattress generally all includes along the framework of arranging all around, the chamber that holds that the framework formed, the encapsulation membrane of the thermal-insulated core of setting and the laminating of thermal-insulated core both sides in the cavity, and production technology is complicated, and the cost is higher.
3) The buffering heat insulation pad is mainly made of aerogel, polyurethane foam or silicon foam, and is made of a single material; and in extreme cases, under the condition of high temperature or open fire generated by thermal runaway of the battery pack, the buffer heat-insulating pad has little effect or even fails.
4) The installation mode of the buffering heat insulation pad generally adopts a double-sided adhesive tape pasting mode. The positioning is difficult, special equipment or tooling is needed, and the process is complex.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving prior art's is not enough, provides a buffering heat insulating mattress between module and battery package thereof, through installing buffering heat insulating mattress between two adjacent battery module, can prevent effectively that single battery module thermal runaway influence from stretching other battery modules in the battery package, has improved the vibration stability of battery package simultaneously.
The utility model discloses a realize through following technical scheme:
an inter-module buffer heat insulation pad, comprising:
the buffer heat insulation sheet consists of a packaging layer and a buffer heat insulation group layer, and the buffer heat insulation group layer is packaged on two sides of the packaging layer;
the positioning clamping pieces are used for clamping the buffering heat insulation pieces at two ends, and the buffering heat insulation pieces are arranged between the two adjacent battery modules through the two ends.
As the preferred technical proposal of the utility model, the positioning and clamping piece comprises an installation flat plate, and both sides of the installation flat plate are respectively provided with a fixing hole; the positioning clamping piece is arranged between the two adjacent battery modules through bolts arranged in the fixing holes in the two sides of the mounting flat plate and matched with the mounting holes in the end plates at the two ends of the two adjacent battery modules.
As a preferred technical solution of the present invention, the two ends of the length direction of the packaging layer are provided with packaging protrusions, and the packaging protrusions are formed by laminating the end portions of the two packaging layers exceeding the buffer heat insulation group layer in the length direction; the buffer heat insulation sheet is clamped between the two positioning clamping pieces through the packaging protruding parts at two ends.
As the preferred technical scheme of the utility model, be equipped with the cooperation on the location holder the insertion groove of encapsulation bellying, buffering heat insulating sheet both ends encapsulation bellying do not insert to in the insertion groove and quilt the insertion groove centre gripping.
In a preferred embodiment of the present invention, the insertion groove is formed of two elastic plates disposed opposite to each other, and the package projection inserted into the insertion groove is held by the elastic pressing of the two elastic plates.
As the utility model discloses a preferred technical scheme, two sides elastic plate inboard still is provided with spacing arch.
As the utility model discloses a preferred technical scheme, the insertion groove is constructed by the relative elastic plate that sets up in two sides, and the relative elastic plate that sets up in two sides constitutes vertical boss, vertical boss is connected the installation is dull and stereotyped to locate between two adjacent battery module.
As a preferred technical scheme of the utility model, the positioning and clamping piece further comprises a clamping plate, wherein the clamping plate is an extension body which is vertically extended downwards from the outer edge of the installation flat plate and is vertically connected with the longitudinal boss; the positioning clamping piece clamping the buffering heat insulation sheet is arranged between the two adjacent battery modules through the fixing holes on the two sides of the mounting flat plate and the bolts arranged in the mounting holes of the end plates at the two ends of the two adjacent battery modules; align two adjacent battery module through the screens board fast in the installation, improve assembly efficiency greatly.
As the utility model discloses a preferred technical scheme, clearance between two adjacent battery module is less than or equal to the thickness of buffering heat shield, the buffering heat shield has the compression characteristic of resumeing.
As the utility model discloses an optimal technical scheme, buffering thermal-insulated group layer comprises insulating layer and flame retardant coating complex, the flame retardant coating sets up between two insulating layers, through the encapsulation of packaging layer two sides encapsulation pressfitting forms buffering heat insulating sheet.
As the preferred technical scheme of the utility model, the encapsulation layer adopts PI membrane or PET membrane or PC membrane or resin material to make, the preferential PET membrane.
As the preferred technical scheme of the utility model, the insulating layer adopts aerogel or foaming silica gel material to make.
As the preferred technical scheme of the utility model, the flame retardant coating adopts ceramic silicon rubber material to make.
The utility model also provides a battery package, including a plurality of battery module and the buffer heat insulating mattress between the above-mentioned module, the buffer heat insulating mattress sets up between two adjacent battery modules between the module.
The utility model has the advantages as follows:
a. the thermal runaway influence of a single battery module can be effectively prevented from spreading to other battery modules in the battery pack through the inter-module buffering heat-insulating pad, and the thermal runaway performance of the whole pack is improved;
b. the expansion of the battery module in the later cycle period can be absorbed through the elasticity of the buffer heat-insulation pad between the modules, and the vibration stability of the battery pack is improved;
c. the inter-module buffering heat insulation pad is formed by directly laminating and packaging two surfaces of a fireproof layer sandwiched between two heat insulation layers through a packaging layer without a silica gel frame body, and is convenient and quick to produce and low in cost; in addition, the fireproof and heat-insulating properties of the buffering heat-insulating pad are improved through the arrangement of the fireproof layer;
d. adopt the location holder to connect the buffering heat insulating sheet between two adjacent battery modules, installation simple process, and rework and disassemble can not produce the cull, carry out the spacing of lateral position to two adjacent battery modules of waiting to install the thermal-insulated pad of buffering between the module through the screens board on the location holder simultaneously, avoid the horizontal drunkenness of battery module in the installation, further improve the installation effectiveness.
Drawings
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a front view of the present invention.
Fig. 3 is a partial structural cut-away view of a-a in fig. 2.
Fig. 4 is an exploded view of the buffering insulation sheet.
Fig. 5 is a perspective view of the positioning clamp.
Fig. 6 is a schematic structural view of the present invention installed between two adjacent battery modules.
In the figure: the battery module comprises a buffer heat insulation sheet 1, a positioning clamping piece 2, a packaging layer 11, a packaging convex part 111, a buffer heat insulation group layer 12, a heat insulation layer 121, a fireproof layer 122, a longitudinal boss 21, an insertion groove 211, a limiting protrusion 2111, an installation platform 22, a fixing hole 221, a clamping plate 23, a battery module 3 and an installation hole 31.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, the present invention provides a thermal insulating cushion for buffering between modules, including: the buffer heat insulation sheet 1 is composed of a packaging layer 11 and a buffer heat insulation group layer 12, and the buffer heat insulation group layer 12 is packaged on two sides of the packaging layer 11; and the positioning clamping pieces 2 are used for clamping the buffering heat insulation pieces 1 at two ends, and the buffering heat insulation pieces 1 are arranged between the two adjacent battery modules 3 through the positioning clamping pieces 2 at the two ends.
The positioning clamping piece 2 comprises a mounting flat plate 22, and fixing holes 221 are respectively formed in two sides of the mounting flat plate 22; the positioning clamp 2 is arranged between two adjacent battery modules 3 through the fixing holes 221 on the two sides of the mounting plate 22 and the bolts arranged in the mounting holes 31 of the end plates at the two ends of the two adjacent battery modules 3.
Two ends of the packaging layer 11 in the length direction are provided with packaging protruding parts 111, and the packaging protruding parts 111 are formed by laminating the end parts of the two packaging layers 11 exceeding the buffer heat insulation group layer 12 in the length direction; the cushion heat insulating sheet 1 is held between the two positioning holders 2 by the sealing protrusions 111 at both ends.
The positioning clamping piece 2 is provided with an insertion groove 211 matched with the packaging convex part 111, and the packaging convex parts 111 at two ends of the buffering heat insulation sheet 1 are respectively inserted into the insertion groove 211 and clamped by the insertion groove 211.
The insertion groove 211 is formed of elastic plates having opposite surfaces, and the package projection 111 inserted into the insertion groove 211 is held by the elastic pressing of the elastic plates.
The inner sides of the two elastic plates are also provided with limiting protrusions 2111, the limiting protrusions 2111 are of a protruding or wedge-shaped structure, the requirement for the flatness of the elastic plates is reduced by arranging the limiting protrusions 2111, the processing difficulty is further reduced, and the buffer heat insulation sheet 1 is guided, installed and limited through the limiting protrusions 2111.
The insertion groove 211 is formed by elastic plates with two opposite sides, the elastic plates with two opposite sides form a longitudinal boss 21, and the longitudinal boss 21 is connected to the installation flat plate 22 and positioned between the two fixing holes 221, and is perpendicular to the installation flat plate 22, so that a T-shaped structure is formed between the longitudinal boss 21 and the installation flat plate 22. The positioning clamping piece 2 further comprises a clamping plate 23, the clamping plate 23 is an extension body which is vertically extended downwards from the outer edge of the installation flat plate 22, and the extension body is vertically connected with the longitudinal boss 21; the positioning clamping piece 2 clamping the buffering heat insulation sheet 1 is arranged between two adjacent battery modules 3 through the fixing holes 221 on the two sides of the mounting flat plate 22 and the bolts arranged in the mounting holes 31 of the end plates at the two ends of the two adjacent battery modules 3; during the installation, the transverse position of the battery module 3 of the buffer heat insulation pad between two adjacent modules to be installed is rapidly limited through the clamping plate 23, the transverse movement of the battery module 3 in the installation process is avoided, and the installation efficiency is further improved.
The gap between the two adjacent battery modules 3 is less than or equal to the thickness of the buffer heat-insulating sheet 1, and the buffer heat-insulating sheet 1 has the characteristic of compression recovery.
The buffer heat insulation group layer 12 is formed by compounding heat insulation layers 121 and a fireproof layer 122, the fireproof layer 122 is arranged between the two heat insulation layers 121, and the buffer heat insulation sheet 1 is formed by packaging and pressing two surfaces of the packaging layer 11.
The packaging layer 11 is made of a PI film, a PET film, a PC film or a resin material, preferably a PET film.
The heat insulation layer 121 is made of aerogel or foamed silica gel material; the fireproof layer 122 is made of ceramic silicon rubber materials, has elastic silica gel characteristics at normal temperature, absorbs expansion and vibration of the module, is ceramic at high temperature, and has good fireproof performance.
A battery pack comprises a plurality of battery modules 3, a plurality of battery modules 3 and an inter-module buffering heat insulation pad, wherein the inter-module buffering heat insulation pad is arranged between two adjacent battery modules 3; the buffering heat insulating sheet 1 on the buffering heat insulating pad between the modules is clamped between two positioning clamping pieces 2 through the packaging protruding parts 111 at two ends, the fixing holes 221 at two sides of the two mounting flat plates 22 of the two positioning clamping pieces 2 are matched with the bolt arranged in the mounting holes 31 at two end plates at two adjacent battery modules 3, and the installation is convenient and quick.
The utility model has simple structure, convenient and fast installation and low cost, can effectively prevent the thermal runaway influence of a single battery module 3 from spreading to other battery modules 3 in the battery pack, and improves the thermal runaway performance of the whole pack level; the expansion of the battery module 3 in the later cycle period can be absorbed through the elasticity of the buffer heat-insulation pad between the modules, and the vibration stability of the battery pack is improved; the inter-module buffering heat insulation pad is formed by directly pressing and packaging two sides of a fire-proof layer 122 sandwiched between two heat insulation layers 121 through a packaging layer 11 without a silica gel frame body, and is convenient and quick to produce and low in cost; in addition, the fireproof and heat-insulating properties of the buffering heat-insulating pad 12 are improved by arranging the fireproof layer 122; the buffering heat insulation sheet 1 is limited and fixed between two adjacent battery modules 3 through the positioning clamping piece 2, the installation process is simple, and no adhesive residue is generated during reworking and disassembling; and meanwhile, the transverse position of the battery module 3 of the buffer heat-insulation pad between two adjacent modules to be installed is limited by the clamping plate 23 on the positioning clamping piece 2, so that the transverse movement of the battery module 3 in the installation process is avoided, and the installation efficiency is further improved.
Claims (10)
1. The utility model provides a buffering heat insulating mattress between module which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the buffer heat insulation sheet (1) is composed of a packaging layer (11) and a buffer heat insulation group layer (12), and the buffer heat insulation group layer (12) is packaged on two sides of the packaging layer (11);
the battery module comprises positioning clamping pieces (2) used for clamping the buffering heat insulation pieces (1) at two ends, wherein the buffering heat insulation pieces (1) are arranged between two adjacent battery modules (3) through the positioning clamping pieces (2) at the two ends.
2. The cushion/insulation pad as claimed in claim 1, wherein: the positioning clamping piece (2) comprises an installation flat plate (22), and fixing holes (221) are respectively formed in two sides of the installation flat plate (22); the positioning clamping piece (2) is arranged between two adjacent battery modules (3) through bolts arranged in fixing holes (221) on two sides of the installation flat plate (22) and in matching with installation holes (31) of end plates at two ends of the two adjacent battery modules (3).
3. The cushion and heat insulation pad for module room as claimed in claim 2, wherein: two ends of the packaging layer (11) in the length direction are provided with packaging protruding parts (111), and the packaging protruding parts (111) are formed by laminating end parts of the two packaging layers (11) exceeding the buffer heat insulation group layer (12) in the length direction; the buffer heat insulation sheet (1) is clamped between the two positioning clamping pieces (2) through the packaging protruding parts (111) at the two ends.
4. The cushion and heat insulation pad between modules as claimed in claim 3, wherein: the positioning clamping piece (2) is provided with an insertion groove (211) matched with the packaging protruding part (111), and the packaging protruding parts (111) at the two ends of the buffering heat insulation sheet (1) are respectively inserted into the insertion groove (211) and clamped by the insertion groove (211).
5. The cushion and heat insulation pad for module as claimed in claim 4, wherein: the insertion groove (211) is formed by elastic plates with two opposite surfaces, and the packaging protruding part (111) inserted into the insertion groove (211) is clamped by the elastic pressing of the elastic plates.
6. The cushion and heat insulation pad between modules as claimed in claim 5, wherein: the inner sides of the two elastic plates are also provided with limiting bulges (2111).
7. The cushion and heat insulation pad for module as claimed in claim 4, wherein: the insertion groove (211) is constructed by elastic plates arranged oppositely on two sides, the elastic plates arranged oppositely on two sides form a longitudinal boss (21), and the longitudinal boss (21) is connected with the installation flat plate (22) and arranged between two adjacent battery modules (3); the positioning clamping piece (2) further comprises a clamping plate (23), the clamping plate (23) is an extension body which vertically extends downwards from the outer edge of the installation flat plate (22), and the extension body is vertically connected with the longitudinal boss (21).
8. The cushion/insulation pad as claimed in claim 1, wherein: the gap between the two adjacent battery modules (3) is less than or equal to the thickness of the buffer heat-insulating sheet (1), and the buffer heat-insulating sheet (1) has the characteristic of compression recovery.
9. The cushion/insulation pad as claimed in claim 1, wherein: the buffer heat insulation layer (12) is formed by compounding a heat insulation layer (121) and a fireproof layer (122), the fireproof layer (122) is arranged between the two heat insulation layers (121), and the buffer heat insulation sheet (1) is formed by packaging and pressing two sides of the packaging layer (11).
10. A battery pack, includes a plurality of battery module (3), its characterized in that: the battery pack further comprises an inter-module cushioning and insulating mat according to any one of claims 1 to 9, which is disposed between two adjacent battery modules (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022368655.8U CN213340510U (en) | 2020-10-22 | 2020-10-22 | Buffer heat insulation pad between modules and battery pack thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022368655.8U CN213340510U (en) | 2020-10-22 | 2020-10-22 | Buffer heat insulation pad between modules and battery pack thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213340510U true CN213340510U (en) | 2021-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022368655.8U Active CN213340510U (en) | 2020-10-22 | 2020-10-22 | Buffer heat insulation pad between modules and battery pack thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213340510U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113764784A (en) * | 2021-08-23 | 2021-12-07 | 厦门佳智科技有限公司 | Coating and printing process for battery cell heat insulation sheet |
| CN115302918A (en) * | 2022-07-07 | 2022-11-08 | 东莞市硅翔绝缘材料有限公司 | Preparation method of integrated folding and winding heat insulation pad and heat insulation pad |
-
2020
- 2020-10-22 CN CN202022368655.8U patent/CN213340510U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113764784A (en) * | 2021-08-23 | 2021-12-07 | 厦门佳智科技有限公司 | Coating and printing process for battery cell heat insulation sheet |
| CN115302918A (en) * | 2022-07-07 | 2022-11-08 | 东莞市硅翔绝缘材料有限公司 | Preparation method of integrated folding and winding heat insulation pad and heat insulation pad |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220125 Address after: 215500 room 808, No. 1, Southeast Avenue, Changshu high tech Industrial Development Zone, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zenergy Battery Technologies Co.,ltd Address before: No.15, Huashang Road, Airport Economic Development Zone, Jiangning District, Nanjing City, Jiangsu Province Patentee before: Jiangsu Tafel Power System Co.,Ltd. Patentee before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |