CN208422965U - A kind of battery pack - Google Patents
A kind of battery pack Download PDFInfo
- Publication number
- CN208422965U CN208422965U CN201820660421.0U CN201820660421U CN208422965U CN 208422965 U CN208422965 U CN 208422965U CN 201820660421 U CN201820660421 U CN 201820660421U CN 208422965 U CN208422965 U CN 208422965U
- Authority
- CN
- China
- Prior art keywords
- heat
- battery
- radiator structure
- battery pack
- conducting plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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
Abstract
The utility model discloses a kind of battery pack, including having shell, at least one battery, radiator structure and the first heat-conducting plate of opening.Wherein, battery is mounted in shell inner cavity, and radiator structure is arranged in correspondingly in the opening of shell, towards preset clearance between the end of opening side on radiator structure and battery；First heat-conducting plate is arranged in preset clearance；First heat-conducting plate uses the Heat Conduction Material with required insulating properties to be made.The setting of first heat-conducting plate is so that the preset clearance between battery end and radiator structure is filled, in battery high power discharge, the heat that battery core generates rapidly can first pass to the first heat-conducting plate, it is transferred to radiator structure again through the first heat-conducting plate, heat convection occurs for radiator structure and outside air, accelerates the radiating rate of battery pack；Meanwhile first heat-conducting plate while make the first heat-conducting plate play heat spreading function, it will insulate between radiator structure and the end of battery, avoid the occurrence of conducting phenomenon.
Description
Technical field
The utility model relates to the technical fields of battery, and in particular to a kind of battery pack.
Background technique
With the continuous development of electronic products, demand of the electronic product to battery pack is also more and more, for example, new energy vapour
Vehicle needs to be arranged battery pack, grass trimmer needs that battery pack is arranged.
In the prior art, it often needs to charge to electronic equipment in the short time outdoors, this is required to electronic equipment
The battery pack to charge realizes powerful electric discharge in a short time, this gives out battery moment in battery pack largely
Heat, the heat need in time row outwardly, otherwise the performance of battery in battery pack is had an impact.In the prior art to electricity
The radiating mode of Chi Bao is usually: the shell of battery pack has opening, and radiator structure, such as radiating fin are arranged in opening,
Battery is mounted in shell inner cavity, preset clearance between battery and radiating fin；Fan is set outside radiating fin, and fan is to scattered
Hot fin blowing, realizes heat sinking function.
But such radiator structure, there are gap, the heat on battery is first transmitted to battery and dissipates for battery and radiating fin
Between hot fin in the air in gap, then passes to radiating fin and carry out heat convection, the low efficiency of the heat exchange mode.
Utility model content
Therefore, the technical problem to be solved by the utility model is to the heat dissipations of the radiator structure of battery pack in the prior art
The problem of low efficiency.
For this purpose, the utility model provides a kind of battery pack, including
Shell has at least one opening；
At least one battery is mounted in the inner cavity of the shell；
Radiator structure is arranged in the opening of the shell, the radiator structure and institute correspondingly with the opening
It states on battery towards preset clearance between the end of the opening side；
First heat-conducting plate is arranged in the preset clearance；First heat-conducting plate uses leading with required insulating properties
Hot material is made.
Preferably, above-mentioned battery includes that first heat-conducting plate is opened described on the battery by held tight
Between the end and the radiator structure of mouth side.
Preferably, above-mentioned battery pack, first heat-conducting plate are heat-conducting silica gel sheet.
Preferably, above-mentioned battery pack further includes be arranged between the radiator structure and first heat-conducting plate
Two heat-conducting plates, second heat-conducting plate are made of metal thermal conductive material.
Preferably, above-mentioned battery pack has first electrode on the end of the opening side on the battery, far
There is second electrode on the other end from the opening side；
The first metallic conduction piece and the second metallic conduction piece are respectively arranged in the first electrode and second electrode；It is described
The preset clearance is formed between first metallic conduction piece and the radiator structure.
Preferably, above-mentioned battery pack further includes being arranged between the opening of the shell and the radiator structure to prevent
Watertight seal, the waterproof seal are used to seal the gap between the opening of the shell and the radiator structure.
It is further preferred that above-mentioned battery pack, the waterproof seal is sealing ring.
Preferably, above-mentioned battery pack, the radiator structure include bottom plate；And it is vertically mounted on the bottom plate at least
One radiating fin；
Over said opening, the radiating fin is towards outside for bottom plate setting.
Preferably, above-mentioned battery pack further includes being arranged in outside the battery pack and close to the fan of the radiator structure.
Preferably, above-mentioned battery pack, on the top for being provided with the shell.
Technical solution provided by the utility model, has the advantages that
1. battery pack provided by the utility model, including having the shell of opening, at least one battery, radiator structure and the
One heat-conducting plate.Wherein, battery is mounted in shell inner cavity, and radiator structure is arranged in correspondingly in the opening of the shell,
Towards preset clearance between the end of the opening side on the radiator structure and the battery；First heat-conducting plate is arranged in institute
It states in preset clearance；First heat-conducting plate uses the Heat Conduction Material with required insulating properties to be made.
It is thermally conductive to be arranged first between the radiator structure of the opening of shell and the end of battery for the battery pack of this structure
Plate, so that the preset clearance between battery end and radiator structure is filled, in battery high power discharge, the heat of battery core generation
Amount rapidly can first pass to the first heat-conducting plate, be transferred to radiator structure, radiator structure and outside air again through the first heat-conducting plate
Heat convection occurs, accelerates the radiating rate of battery pack；Meanwhile first heat-conducting plate also there is insulating properties so that the first heat-conducting plate
While playing heat spreading function, it will insulate between radiator structure and the end of battery, avoid the occurrence of conducting phenomenon, dissipated to improve
Ensure the security performance of battery pack while hot property.
2. battery pack provided by the utility model, the first heat-conducting plate is by held tight on the battery towards the opening
Between the end of side and the radiator structure, it is ensured that the heat generated when battery discharge is directly passed to the first heat-conducting plate, into
Improve to one step the heat dissipation performance of battery pack.
3. battery pack provided by the utility model, there is the first electricity on the end of the opening side on the battery
Pole, far from it is described opening side the other end on have second electrode；It is respectively set in the first electrode and second electrode
There are the first metallic conduction piece and the second metallic conduction piece；Described in being formed between the first metallic conduction piece and the radiator structure
Preset clearance.
The battery pack of this structure the first heat-conducting plate is arranged between the first metallic conduction piece and radiator structure, so that electric
The heat that pond sheds, which is concentrated, passes to the first heat-conducting plate through the first metallic conduction piece, then passes to radiator structure, comes further
Improve the radiating efficiency of battery pack.
4. battery pack provided by the utility model further includes being arranged between the opening of the shell and the radiator structure
Waterproof seal, the waterproof seal be used for seal the shell opening the radiator structure between gap.
The battery pack of this structure is connected the gap sealing between the opening and radiator structure of shell by waterproof seal
It connects, when battery pack is outdoors in use, the water being located at outside battery pack will not enter in battery pack, so that the battery pack solves heat dissipation
The waterproof performance of battery pack is solved while problem.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the schematic perspective view of the battery pack provided in the utility model embodiment 1；
Fig. 2 is the floor map in Fig. 1 after the longitudinal profile of battery pack；
Fig. 3 is the stereoscopic schematic diagram in Fig. 1 after the longitudinal profile of battery pack；
Fig. 4 is that battery pack removes the schematic diagram after radiator structure in Fig. 1；
Fig. 5 is the structural schematic diagram after the upper backup pad, lower supporting plate of battery pack in Fig. 1, nickel sheet and circuit board assembly；
Description of symbols:
1- shell；11- opening；
2- battery；21- nickel sheet；
3- radiator structure；31- bottom plate；32- radiating fin；
The first heat-conducting plate of 4-；
5- first circuit board；
6- waterproof seal；
71- upper backup pad；72- lower supporting plate.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Not constituting conflict can be combined with each other.
Embodiment 1
The present embodiment provides a kind of battery packs, as shown in Figures 1 to 5, including shell 1, multiple batteries 2, radiator structure 3 and
First heat-conducting plate 4.
As shown in Figures 2 and 3, the top of shell 1 has opening 11, and multiple batteries 2 are mounted in the inner cavity of shell 1, example
It is arranged as multiple batteries 2 are divided to for two, multiple batteries 2 can be connected in series, and be perhaps connected in parallel or percentage of batteries 2 is connected, part
Battery 2 is set side by side.It is provided with parallel upper backup pad and lower supporting plate 72 in shell, offers installation in two support plates
The top and bottom in hole, each battery 2 are separately mounted in the mounting hole of upper backup pad 71 and lower supporting plate 72.Each battery 2
Top and bottom on be respectively provided with the first metal electrode film and the second metal electrode film.
There is first electrode on the top of battery 2, there is second electrode on bottom.For example, first electrode be anode, second
Electrode is cathode, is respectively arranged with the first metallic conduction piece and the second metallic conduction piece on anode and cathode.Such as first metal
Conductive sheet and the second metallic conduction piece are both preferably nickel sheet 21.As shown in figure 5, the first electricity of setting between the top of two column batteries 2
Second circuit board is arranged between the bottom of two column batteries 2 in road plate 5, and the first metallic conduction piece extends and is connected to first circuit board
5, the second metallic conduction piece extends and is connected to second circuit board.Preferably, as shown in figure 5, the middle part of upper backup pad 71 has
The U-shaped groove of recess, first circuit board 5 are mounted in U-shaped groove, opened up on the slot bottom at the both ends of U-shaped groove it is jagged, this lack
Mouth forms threading opening, and supply lines passes through.
As shown in Figures 2 and 3, radiator structure 3 is arranged in the opening 11 of shell 1, and radiator structure 3 includes being mounted on shell
Bottom plate 31 in 1 top opening 11, and the multiple radiating fins 32 being vertically mounted on the top surface of bottom plate 31, adjacent two
The setting of a interval of radiating fin 32.Preferably, radiating fin 32 is aluminium flake, and bottom plate 31 also uses aluminium material.For example, such as Fig. 1 and
Shown in Fig. 2, radiating fin is 17 or 16,18,15 etc..
As shown in figure 3, forming preset clearance between nickel sheet 21 in the bottom surface of bottom plate 31 and the anode of battery 2.The
One heat-conducting plate 4 is arranged in the preset clearance, and bottom is contacted with the nickel sheet 21 on anode, top surface and radiator structure 3
Bottom plate 31 contact.First heat-conducting plate 4 is made of the Heat Conduction Material with required insulating properties, such as the first heat-conducting plate 4 is to lead
Hot silica gel piece, heat-conducting silica gel sheet itself have certain elasticity, are compressed between the nickel sheet 21 and bottom plate 31 of anode, it is ensured that thermally conductive
Silica gel piece fills full entire preset clearance.Most preferably, heat-conducting silica gel sheet covers the nickel sheet on the anode of all batteries 2.It is thermally conductive
The insulating properties of silica gel piece will insulate between radiator structure and the end of battery 2, avoid the occurrence of conducting phenomenon.
When the battery 2 in the battery pack discharges high-powerly, the heat that the battery core of multiple batteries 2 sheds is through just extremely fast
First be transmitted in nickel sheet 21, be directly passed to heat-conducting silica gel sheet through nickel sheet 21, heat-conducting silica gel sheet transfer heat to bottom plate 31 and
Radiating fin 32, radiating fin 32 and bottom plate 31 and outside air heat convection, so that it is guaranteed that battery 2 is in high power discharge,
The heat given out is transmitted to extraneous generation heat convection in time, the temperature of battery 2 is reduced, so that the temperature of battery 2 will not
It is excessively high, improve the heat dissipation effect and radiating efficiency of entire battery pack.
In order to further improve the radiating efficiency of battery pack, battery pack further includes being arranged outside battery pack and close to heat dissipation
The fan (not illustrating in figure) of structure 3 after fan is opened, accelerates the convection current between outside air and bottom plate 31 and radiating fin
Heat transfer rate further accelerates the heat dissipation of battery 2.
As shown in figure 4, above-mentioned battery pack further includes waterproof seal 6, the opening of shell 1 is arranged in waterproof seal 6
Between 11 and bottom plate 31, for the gap between the opening 11 and bottom plate 31 of sealing shell 1, so that the battery pack has high heat dissipation
While efficiency, there is good waterproof performance, avoid extraneous steam or water through between bottom plate 31 and the opening 11 of shell 1
Gap enters in 1 inner cavity of shell, influences the performance of battery, and the battery pack is enabled to have certain moisture content or humidity outdoors
It is used in big environment.
For example, waterproof seal 6 is sealing ring, the surrounding of sealing ring has mounting hole, by fastener by sealing ring, bottom
The edge of the opening 11 of plate 31 and shell 1 tightens together.
As first interchangeable embodiment of embodiment 1, battery pack further includes that setting is led in bottom plate 31 with first
The second heat-conducting plate (not illustrating in figure) between hot plate 4, the second heat-conducting plate are made of metal thermal conductive material.First heat-conducting plate
4 and second heat-conducting plate fill jointly formed between the nickel sheet 21 in the bottom surface of full bottom plate 31 and the anode of battery it is reserved between
Gap.
It for example, the second heat-conducting plate is aluminium sheet, or is copper sheet, silver plate, aluminium alloy plate etc..Metal heat-conducting plate is to heat
For direction of transfer along the transverse direction of heat-conducting plate, above-mentioned heat-conducting silica gel sheet along the longitudinal direction of heat-conducting plate, makes the direction of transfer of heat
The heat that gives out of battery core of battery is first transmitted through heat-conducting silica gel sheet along longitudinal direction, heat transversely transmits on aluminium sheet later,
Last heat passes to the bottom plate 31 and radiating fin 32 of radiator structure 3 again.Heat is existing in the shell 1 of battery pack laterally to be passed
Longitudinal transmitting is passed and has, so that heat is evenly distributed in shell 1, environment temperature locating for battery is consistent, is more advantageous to battery
Stability.
As second interchangeable embodiment of embodiment 1, it is also provided with opening on the bottom of shell 1, and outside
Above-mentioned radiator structure 3, the first heat-conducting plate 4 and waterproof grommet are set on the bottom opening of shell 1.This embodiment, in shell 1
Top opening 11 and bottom opening on the first heat-conducting plate 4 and radiator structure 3 is respectively set, when battery large effect discharge when,
The heat that battery core sheds is delivered separately to positive nickel sheet 21 and cathode nickel sheet 21 through cathode and anode, and two nickel sheet 21 divide heat
Supplementary biography is handed on corresponding heat-conducting silica gel sheet and radiator structure 3, further improves radiating efficiency.It is of course also possible to
Another fan is set outside radiator structure 3 on 1 bottom opening of shell, accelerates the convection current of the radiator structure 3 and outside air
Speed.As further mode of texturing, opening can also be only opened up on the bottom of shell 1, radiator structure 3 and first are led
Hot plate 4 is arranged on the bottom opening of shell 1.
As the interchangeable embodiment of third of embodiment 1, it can also be not provided with above-mentioned fan, only rely on heat dissipation
The convection current of structure 3 and outside air also can be improved the radiating efficiency of battery pack.Radiating fin 32 in radiator structure 3 can be with
Be it is multiple, such as three, four, five, six, seven etc., or two or one, the setting number of radiating fin
Depending on measuring according to actual needs, it is not specifically limited herein.Bottom plate 31 and radiating fin 32 can also use other materials, such as
Copper or albronze, as long as existing heat radiating metal material is ok.
As the 4th interchangeable embodiment of embodiment 1, above-mentioned waterproof seal 6 is in addition to for sealing ring, also
The sealing element of sealing function can be played in the prior art for other, can be metal elastic-sealed, it can also be the hard close of metal
Envelope.As further deformation, it can also be not provided with above-mentioned waterproof seal 6, the bottom plate 31 of radiator structure 3 is directly anchored to
In the opening 11 of shell 1.
As the 5th interchangeable embodiment of embodiment 1, the first heat-conducting plate 4 can also be the thermally conductive of other materials
Piece, such as ceramic powder and ultra-thin glass fibrous composite are filled using superelevation.
As the 6th interchangeable embodiment of embodiment 1, the first heat-conducting plate 4 can not also closely be clamped in bottom
Subtract towards the preset clearance between the end of opening 11 as long as the first heat-conducting plate 4 is arranged in the preset clearance on plate 31 and battery
The distance of few preset clearance, so that it may improve the radiating efficiency in the heat transfer to radiator structure 3 on battery.
As the 7th interchangeable embodiment of embodiment 1, radiator structure 3 can also be other structures, such as dissipate
Heat structure 3 is the thermal conductivity graphene film being directly installed in the opening 11 of shell 1 or graphite guide hotting mask etc..
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes among the protection scope created still in the utility model.
Claims (10)
1. a kind of battery pack, which is characterized in that including
Shell (1) has at least one opening (11)；
At least one battery (2), is mounted in the inner cavity of the shell (1)；
Radiator structure (3) is arranged in the opening (11) of the shell (1) correspondingly with the opening (11), described to dissipate
Towards preset clearance between the end of described opening (11) side on heat structure (3) and the battery (2)；
First heat-conducting plate (4) is arranged in the preset clearance；First heat-conducting plate (4), which uses, has required insulating properties
Heat Conduction Material is made.
2. battery pack according to claim 1, which is characterized in that first heat-conducting plate (4) is by held tight described
Towards between the end and the radiator structure (3) of described opening (11) side on battery (2).
3. battery pack according to claim 1, which is characterized in that first heat-conducting plate (4) is heat-conducting silica gel sheet.
4. battery pack according to any one of claim 1-3, which is characterized in that further include being arranged in the radiator structure
(3) the second heat-conducting plate between first heat-conducting plate (4), second heat-conducting plate are made of metal thermal conductive material.
5. battery pack according to any one of claim 1-3, which is characterized in that opened on the battery (2) close to described
There is first electrode on the end of mouth (11) side, there is second electrode on the other end far from described opening (11) side；
The first metallic conduction piece and the second metallic conduction piece are respectively arranged in the first electrode and second electrode；Described first
The preset clearance is formed between metallic conduction piece and the radiator structure (3).
6. battery pack according to any one of claim 1-3, which is characterized in that further include being arranged in the shell (1)
Opening (11) and the radiator structure (3) between waterproof seal (6), the waterproof seal (6) is described for sealing
Gap between the opening (11) and the radiator structure (3) of shell (1).
7. battery pack according to claim 6, which is characterized in that the waterproof seal (6) is sealing ring.
8. battery pack according to any one of claim 1-3, which is characterized in that the radiator structure (3) includes bottom plate
(31)；And it is vertically mounted at least one radiating fin (32) on the bottom plate (31)；
The bottom plate (31) is arranged on the opening (11), and the radiating fin (32) is towards outside.
9. battery pack according to any one of claim 1-3, which is characterized in that further include being arranged in the battery (2)
The fan of packet outer and close the radiator structure (3).
10. battery pack according to any one of claim 1-3, which is characterized in that the opening (11) is provided with described
On the top of shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820660421.0U CN208422965U (en) | 2018-05-04 | 2018-05-04 | A kind of battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820660421.0U CN208422965U (en) | 2018-05-04 | 2018-05-04 | A kind of battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208422965U true CN208422965U (en) | 2019-01-22 |
Family
ID=65117094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820660421.0U Expired - Fee Related CN208422965U (en) | 2018-05-04 | 2018-05-04 | A kind of battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208422965U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649348A (en) * | 2019-09-05 | 2020-01-03 | 章春元 | Quick radiating battery package |
| CN110843545A (en) * | 2019-11-14 | 2020-02-28 | 安徽兴邦专用汽车股份有限公司 | Energy-saving motor home with solar power generation function |
| CN113363614A (en) * | 2021-06-10 | 2021-09-07 | 东莞新能安科技有限公司 | Battery package and consumer |
| CN114709544A (en) * | 2021-04-30 | 2022-07-05 | 东莞新能安科技有限公司 | Battery package and consumer |
-
2018
- 2018-05-04 CN CN201820660421.0U patent/CN208422965U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649348A (en) * | 2019-09-05 | 2020-01-03 | 章春元 | Quick radiating battery package |
| CN110843545A (en) * | 2019-11-14 | 2020-02-28 | 安徽兴邦专用汽车股份有限公司 | Energy-saving motor home with solar power generation function |
| CN114709544A (en) * | 2021-04-30 | 2022-07-05 | 东莞新能安科技有限公司 | Battery package and consumer |
| CN113363614A (en) * | 2021-06-10 | 2021-09-07 | 东莞新能安科技有限公司 | Battery package and consumer |
| CN113363614B (en) * | 2021-06-10 | 2023-02-24 | 东莞新能安科技有限公司 | Battery package and consumer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190122 Termination date: 20210504 |