CN211670300U - Heat radiator for outdoor box formula lithium cell of using - Google Patents
Heat radiator for outdoor box formula lithium cell of using Download PDFInfo
- Publication number
- CN211670300U CN211670300U CN202020436814.0U CN202020436814U CN211670300U CN 211670300 U CN211670300 U CN 211670300U CN 202020436814 U CN202020436814 U CN 202020436814U CN 211670300 U CN211670300 U CN 211670300U
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- Prior art keywords
- fixedly connected
- heat
- heat conduction
- silica gel
- battery
- 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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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 41
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 40
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000000741 silica gel Substances 0.000 claims abstract description 54
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 54
- 239000007788 liquid Substances 0.000 claims abstract description 48
- 238000001816 cooling Methods 0.000 claims abstract description 28
- 239000000178 monomer Substances 0.000 claims abstract description 11
- 239000002826 coolant Substances 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 34
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 34
- 230000017525 heat dissipation Effects 0.000 claims description 21
- 238000005057 refrigeration Methods 0.000 claims description 14
- 239000000428 dust Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 229920001296 polysiloxane Polymers 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- 239000000110 cooling liquid Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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 discloses a heat abstractor that outdoor box formula lithium cell was used relates to lithium cell technical field. The utility model provides a heat abstractor that outdoor box formula lithium cell was used, including the case shell, the first baffle of bolt fixedly connected with is passed through to the one end of case shell, the other end of case shell passes through bolt fixedly connected with second baffle, the first heat conduction silica gel piece of inner wall department fixedly connected with of case shell, the first group battery of fixedly connected with of outer wall department of first heat conduction silica gel piece, first group battery includes the casing, the inside fixedly connected with battery monomer of casing, the free outer wall department fixedly connected with silica gel heat gasket of battery, the inside fixedly connected with liquid cooling pipe of silica gel heat gasket. This heat abstractor that outdoor box formula lithium cell was used through setting up silica gel heat conduction gasket and liquid cooling pipe, utilizes the effectual heat absorption that produces the battery monomer of silica gel heat conduction gasket and transmits for the liquid cooling pipe, and the coolant liquid of the inside circulation of liquid cooling pipe takes away the heat, has reached high-efficient radiating effect.
Description
Technical Field
The utility model relates to a lithium cell technical field specifically is a heat abstractor that outdoor box formula lithium cell was used.
Background
The lithium battery is a battery which takes lithium metal or lithium alloy as an anode material and uses non-aqueous electrolyte solution, a box type lithium battery is one of a plurality of types of lithium batteries, the box type lithium battery is a lithium battery which is formed by connecting a plurality of lithium batteries in series and combining the lithium batteries in a box, the box type lithium battery has larger electricity storage capacity and is suitable for outdoor electrical appliances with larger power, such as an electric automobile, an electric bicycle, an electric bus and the like; in-process that box formula lithium cell used, lithium cell operating current is big, and it is big to produce the heat quantity, and box formula lithium cell is in sealed space moreover, and this just leads to box interior lithium cell operating temperature higher, and when outdoor temperature is higher, box external temperature is higher, and the lithium cell just is in the operating condition of a high temperature, very easily appears phenomenons such as conflagration or explosion, has great safety problem, and this just need take the heat dissipation measure, but current radiating mode exists following not enoughly:
among the prior art, radiating mode is comparatively single, and single air-cooled heat dissipation is the most common heat dissipation mode, and its advantage is with low costs, simple structure, can effectually get rid of the harmful gas of incasement, and its shortcoming is that the heat transfer coefficient is low, and cooling rate is slow, and is inefficient, and when outdoor temperature was higher, the air-cooled heat dissipation can not satisfy the heat dissipation demand of box formula lithium cell, and the lithium cell conflagration and explosion take place easily, has the potential safety hazard.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a heat abstractor that outdoor box formula lithium cell was used possesses the higher advantage of radiating efficiency to solve the lower problem of security performance.
(II) technical scheme
For realizing the higher purpose of radiating efficiency, the utility model provides a following technical scheme: a heat dissipation device for an outdoor box type lithium battery comprises a box shell, wherein one end of the box shell is fixedly connected with a first baffle through a bolt, the other end of the box shell is fixedly connected with a second baffle through a bolt, a first heat-conducting silica gel sheet is fixedly connected to the inner wall of the box shell, a first battery pack is fixedly connected to the outer wall of the first heat-conducting silica gel sheet, the first battery pack comprises a shell, a battery monomer is fixedly connected to the inside of the shell, a silica gel heat-conducting gasket is fixedly connected to the outer wall of the battery monomer, a liquid cooling pipe is fixedly connected to the inside of the silica gel heat-conducting gasket, a liquid outlet end is fixedly connected to one end of the liquid cooling pipe, a liquid inlet end is fixedly connected to the other end of the liquid cooling pipe, a second battery pack is fixedly connected to two sides of the outer wall of the first battery pack through connecting plates, and a second heat-conducting, the lower fixed surface of second heat conduction silica gel piece is connected with first heat conduction aluminum plate, the meshing of first heat conduction aluminum plate's inner wall department has second heat conduction aluminum plate, second heat conduction aluminum plate's lower fixed surface is connected with the third heat conduction silica gel piece.
As a preferred technical scheme of the utility model, the air intake has been seted up on the first baffle, the inside fixedly connected with radiator fan of air intake, the air outlet has been seted up on the second baffle, one side of first baffle is provided with the dust screen.
As a preferred technical scheme of the utility model, the one end fixedly connected with drain pipe of liquid end, the one end of drain pipe extends to the outside and the fixedly connected with refrigeration case of case shell, refrigeration case fixed connection is at the top of case shell, the inside of refrigeration case is provided with the heat exchanger.
As a preferred technical scheme of the utility model, the one end fixedly connected with feed liquor pipe of feed liquor end, the one end of feed liquor pipe extends to the outside and the fixedly connected with refrigeration case of case shell, be provided with the liquid pump on the feed liquor pipe.
As a preferred technical scheme of the utility model, first heat conduction aluminum plate includes the heat conduction bottom plate, one side fixedly connected with heat transfer aluminum sheet of heat conduction bottom plate outer wall, the cavity packing of heat conduction bottom plate has the coolant liquid, first heat conduction aluminum plate's specification is the same with second heat conduction aluminum plate's specification.
As a preferred technical scheme of the utility model, the lower surface and the second group battery fixed connection of third heat conduction silica gel piece, the specification of third heat conduction silica gel piece is the same with the specification of second heat conduction silica gel piece, the specification of second group battery is the same with the specification of first group battery.
(III) advantageous effects
Compared with the prior art, the utility model provides an outdoor heat abstractor that box formula lithium cell was used possesses following beneficial effect:
1. this heat abstractor that outdoor box formula lithium cell was used, through setting up silica gel heat conduction gasket and liquid cooling pipe, utilize the effectual heat absorption and the transmission that produces the battery monomer of silica gel heat conduction gasket to give the liquid cooling pipe, the coolant liquid of the inside circulation of liquid cooling pipe takes away the heat, high-efficient radiating effect has been reached, make first group battery and second group battery work under safe temperature, the effectual potential safety hazard that has reduced the existence, through setting up radiator fan, utilize the effectual heat with the case shell inside to blow away, multiple radiating effect has been reached, the radiating efficiency is greatly improved.
2. This heat abstractor that outdoor box formula lithium cell was used, through setting up first heat conduction silica gel piece, utilize first heat conduction silica gel piece effectual to case shell inner wall department dispel the heat and the shock attenuation, effectual inside and outside heat and the vibrations of case shell have been kept apart, the high electrical insulation of first heat conduction silica gel piece has fine guard action to the group battery with the anti-puncture performance simultaneously, through setting up second heat conduction silica gel piece and third heat conduction silica gel piece, the effectual shock resistance that has improved between first group battery and the second group battery, the problem that external force vibrations lead to the group battery to rock has been avoided, the security of lithium cell during operation has been improved greatly.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of a first baffle of the present invention;
fig. 3 is a schematic diagram of a second baffle structure of the present invention;
fig. 4 is a schematic structural diagram of a first battery pack according to the present invention;
fig. 5 is a schematic structural view of the first heat-conducting aluminum plate of the present invention.
In the figure: 1. a cabinet housing; 2. a first baffle plate; 3. a second baffle; 4. a first heat-conducting silica gel sheet; 5. a first battery pack; 51. a housing; 52. a battery cell; 53. a silica gel heat-conducting gasket; 54. a liquid-cooled tube; 55. a liquid outlet end; 56. a liquid inlet end; 6. a connecting plate; 7. a second battery pack; 8. a second heat-conducting silica gel sheet; 9. a first thermally conductive aluminum plate; 91. a thermally conductive base plate; 92. heat transfer aluminum sheets; 10. a second heat-conducting aluminum plate; 11. a third heat-conducting silica gel sheet; 12. an air inlet; 13. a heat radiation fan; 14. an air outlet; 15. a liquid outlet pipe; 16. a refrigeration case; 17. a liquid inlet pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-5, a heat dissipation device for outdoor box-type lithium battery comprises a box housing 1, one end of the box housing 1 is fixedly connected with a first baffle 2 through a bolt, the other end of the box housing 1 is fixedly connected with a second baffle 3 through a bolt, the inner wall of the box housing 1 is fixedly connected with a first heat conductive silicone sheet 4, the outer wall of the first heat conductive silicone sheet 4 is fixedly connected with a first battery pack 5, the first battery pack 5 comprises a housing 51, a battery monomer 52 is fixedly connected inside the housing 51, a silica gel heat conductive gasket 53 is fixedly connected on the outer wall of the battery monomer 52, a liquid cooling pipe 54 is fixedly connected inside the silica gel heat conductive gasket 53, one end of the liquid cooling pipe 54 is fixedly connected with a liquid outlet end 55, the other end of the liquid cooling pipe 54 is fixedly connected with a liquid inlet end 56, and the two sides of the outer wall of the first battery pack 5 are fixedly connected, the lower fixed surface of first group battery 5 is connected with second heat conduction silica gel piece 8, and the lower fixed surface of second heat conduction silica gel piece 8 is connected with first heat conduction aluminum plate 9, and the meshing of the inner wall department of first heat conduction aluminum plate 9 has second heat conduction aluminum plate 10, and the lower fixed surface of second heat conduction aluminum plate 10 is connected with third heat conduction silica gel piece 11.
Specifically, an air inlet 12 is formed in the first baffle 2, a heat dissipation fan 13 is fixedly connected to the inside of the air inlet 12, an air outlet 14 is formed in the second baffle 3, and a dust screen is arranged on one side of the first baffle 2.
In this embodiment, through setting up radiator fan 13, utilize radiator fan 13 work, inside the effectual cold air with the external world passes through air intake 12 suction case shell 1, the effectual inside heat with case shell 1 is taken away, and cooperation silica gel heat conduction gasket 53 and liquid cooling pipe 54 have reached dual radiating effect, have improved the radiating efficiency greatly.
Specifically, the one end fixedly connected with drain pipe 15 of liquid outlet end 55, the one end of drain pipe 15 extend to case shell 1's outside and fixedly connected with refrigeration case 16, refrigeration case 16 fixed connection is at case shell 1's top, and the inside of refrigeration case 16 is provided with the heat exchanger.
In this embodiment, through setting up drain pipe 15 and refrigeration case 16, utilize drain pipe 15 effectual with the interior hot coolant liquid of liquid cooling pipe 54 to take out to the coolant liquid cooling that the cooperation heat exchanger will have the temperature accomplishes the circulative cooling heat dissipation work.
Specifically, the one end fixedly connected with feed liquor pipe 17 of feed liquor end 56, the one end of feed liquor pipe 17 extends to the outside of case shell 1 and fixedly connected with refrigeration case 16, is provided with the liquid pump on the feed liquor pipe 17.
In this embodiment, by providing the liquid inlet pipe 17 and the refrigerating box 16, the circulating cooling and heat dissipating work is completed by pumping the effective low-temperature cooling liquid in the liquid inlet pipe 17 into the liquid cooling pipe 54
Specifically, first heat conduction aluminum plate 9 includes heat conduction bottom plate 91, and one side fixedly connected with heat transfer aluminum sheet 92 of heat conduction bottom plate 91 outer wall, and the cavity packing of heat conduction bottom plate 91 has the coolant liquid, and first heat conduction aluminum plate 9's specification is the same with second heat conduction aluminum plate 10's specification.
In this embodiment, through setting up first heat conduction aluminum plate 9 and second heat conduction aluminum plate 10, the temperature between effectual reduction first group battery 5 and the second group battery 7 has avoided the temperature exchange between first group battery 5 and the second group battery 7 to cause the problem of high temperature.
Specifically, the lower surface of the third heat-conducting silicone sheet 11 is fixedly connected with the second battery pack 7, the specification of the third heat-conducting silicone sheet 11 is the same as that of the second heat-conducting silicone sheet 8, and the specification of the second battery pack 7 is the same as that of the first battery pack 5.
In this embodiment, set up second heat conduction silica gel piece 8 and third heat conduction silica gel piece 11, the effectual shock resistance that has improved between first group battery 5 and the second group battery 7 has avoided external force vibrations to lead to the problem that the group battery rocked, has improved the security of lithium cell during operation greatly.
The utility model discloses a theory of operation and use flow: when the heat dissipation device is used, when the first battery pack 5 and the second battery pack 7 work to generate heat, the silica gel heat conduction gasket 53 absorbs heat generated by the battery monomer 52 and transmits the heat to the liquid cooling pipe 54, circulating cooling liquid in the liquid cooling pipe 54 takes away the heat, meanwhile, the heat dissipation fan 13 works, external cold air is sucked into the box shell 1 through the air inlet 12 to take away the heat of the first battery pack 5 and the second battery pack 7, hot air is discharged through the air outlet 14, meanwhile, the second heat conduction silica gel sheet 8 absorbs heat generated by the first battery pack 5 and transfers the heat to the first heat conduction aluminum plate 9, the third heat conduction silica gel sheet 11 absorbs heat generated by the second battery pack 7 and transfers the heat to the second heat conduction aluminum plate 10, and cold air generated by the heat dissipation fan 13 takes away heat on the surfaces of the first heat conduction aluminum plate 9 and the second heat conduction aluminum plate 10, so that multiple heat dissipation work is completed.
In summary, according to the heat dissipation device for the outdoor box-type lithium battery, the silica gel heat conduction gasket 53 and the liquid cooling pipe 54 are arranged, the heat generated by the battery monomer 52 is effectively absorbed and transferred to the liquid cooling pipe 54 by the silica gel heat conduction gasket 53, the heat is taken away by the cooling liquid circulating in the liquid cooling pipe 54, so that the high-efficiency heat dissipation effect of the heat dissipation fan 13 is achieved, the first battery pack 5 and the second battery pack 7 are enabled to work at safe temperatures, the potential safety hazards are effectively reduced, the heat in the box shell 1 is effectively blown away by the heat dissipation fan 13 by the arrangement of the heat dissipation fan 13, the multiple heat dissipation effect is achieved, and the heat dissipation efficiency is greatly improved; this heat abstractor that outdoor box formula lithium cell was used, through setting up first heat conduction silica gel piece 4, utilize first heat conduction silica gel piece 4 effectual to 1 inner wall department of case shell dispel the heat and the shock attenuation, effectual inside and outside heat and the vibrations of case shell 1 of having kept apart, first heat conduction silica gel piece 4's high electrical insulation has fine guard action to the group battery with the anti-puncture performance simultaneously, through setting up second heat conduction silica gel piece 8 and third heat conduction silica gel piece 11, the effectual shock resistance that improves between first group battery 5 and the second group battery 7, avoided external force vibrations to lead to the problem that the group battery rocked, the security of lithium cell during operation has been improved greatly.
It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a heat abstractor that outdoor box formula lithium cell was used, includes case shell (1), its characterized in that: the one end of case shell (1) is passed through first baffle of bolt fixedly connected with (2), the other end of case shell (1) is passed through bolt fixedly connected with second baffle (3), the first heat conduction silica gel piece of inner wall department fixedly connected with (4) of case shell (1), the first group battery of fixedly connected with (5) of outer wall department of first heat conduction silica gel piece (4), first group battery (5) are including casing (51), the inside fixedly connected with battery monomer (52) of casing (51), the fixedly connected with silica gel heat conduction gasket (53) of outer wall department of battery monomer (52), the inside fixedly connected with liquid cooling pipe (54) of silica gel heat conduction gasket (53), the one end fixedly connected with of liquid cooling pipe (54) goes out liquid end (55), the other end fixedly connected with feed liquor end (56) of liquid cooling pipe (54), the both sides of first group battery (5) outer wall all are through connecting plate (6) fixedly connected with second group battery (s (2), (the first group battery (3) 7) The lower fixed surface of first group battery (5) is connected with second heat conduction silica gel piece (8), the lower fixed surface of second heat conduction silica gel piece (8) is connected with first heat conduction aluminum plate (9), the meshing of the inner wall department of first heat conduction aluminum plate (9) has second heat conduction aluminum plate (10), the lower fixed surface of second heat conduction aluminum plate (10) is connected with third heat conduction silica gel piece (11).
2. The heat dissipating device for an outdoor box-type lithium battery as set forth in claim 1, wherein: an air inlet (12) is formed in the first baffle (2), a heat dissipation fan (13) is fixedly connected to the inner portion of the air inlet (12), an air outlet (14) is formed in the second baffle (3), and a dust screen is arranged on one side of the first baffle (2).
3. The heat dissipating device for an outdoor box-type lithium battery as set forth in claim 1, wherein: go out one end fixedly connected with drain pipe (15) of liquid end (55), the one end of drain pipe (15) extends to the outside and the fixedly connected with refrigeration case (16) of case shell (1), refrigeration case (16) fixed connection is at the top of case shell (1), the inside of refrigeration case (16) is provided with the heat exchanger.
4. The heat dissipating device for an outdoor box-type lithium battery as set forth in claim 1, wherein: one end fixedly connected with feed liquor pipe (17) of feed liquor end (56), the one end of feed liquor pipe (17) extends to the outside of case shell (1) and fixedly connected with refrigeration case (16), be provided with the liquid pump on feed liquor pipe (17).
5. The heat dissipating device for an outdoor box-type lithium battery as set forth in claim 1, wherein: first heat conduction aluminum plate (9) are including heat conduction bottom plate (91), one side fixedly connected with heat transfer aluminum sheet (92) of heat conduction bottom plate (91) outer wall, the inner chamber packing of heat conduction bottom plate (91) has the coolant liquid, the specification of first heat conduction aluminum plate (9) is the same with the specification of second heat conduction aluminum plate (10).
6. The heat dissipating device for an outdoor box-type lithium battery as set forth in claim 1, wherein: the lower surface of the third heat-conducting silica gel sheet (11) is fixedly connected with the second battery pack (7), the specification of the third heat-conducting silica gel sheet (11) is the same as that of the second heat-conducting silica gel sheet (8), and the specification of the second battery pack (7) is the same as that of the first battery pack (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020436814.0U CN211670300U (en) | 2020-03-31 | 2020-03-31 | Heat radiator for outdoor box formula lithium cell of using |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020436814.0U CN211670300U (en) | 2020-03-31 | 2020-03-31 | Heat radiator for outdoor box formula lithium cell of using |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211670300U true CN211670300U (en) | 2020-10-13 |
Family
ID=72742904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020436814.0U Expired - Fee Related CN211670300U (en) | 2020-03-31 | 2020-03-31 | Heat radiator for outdoor box formula lithium cell of using |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211670300U (en) |
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2020
- 2020-03-31 CN CN202020436814.0U patent/CN211670300U/en not_active Expired - Fee Related
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| 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: 20201013 |