CN215299339U - Fire-proof self-control designated driving battery car - Google Patents
Fire-proof self-control designated driving battery car Download PDFInfo
- Publication number
- CN215299339U CN215299339U CN202120131439.3U CN202120131439U CN215299339U CN 215299339 U CN215299339 U CN 215299339U CN 202120131439 U CN202120131439 U CN 202120131439U CN 215299339 U CN215299339 U CN 215299339U
- Authority
- CN
- China
- Prior art keywords
- fixed
- storage battery
- box
- battery box
- damping
- 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
Links
- 238000013016 damping Methods 0.000 claims description 45
- 238000009423 ventilation Methods 0.000 claims description 16
- 229920001971 elastomer Polymers 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000002265 prevention Effects 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 18
- 239000002344 surface layer Substances 0.000 abstract description 10
- 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 abstract description 9
- 239000003063 flame retardant Substances 0.000 abstract description 9
- 230000017525 heat dissipation Effects 0.000 abstract description 9
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- 238000007664 blowing Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 230000035939 shock Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 229920003002 synthetic resin Polymers 0.000 description 6
- 239000000057 synthetic resin Substances 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000000126 substance 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Landscapes
- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses a fire-proof self-control driving-assistance storage battery car, including the storage battery box fixed on the storage battery car, the tank wall of the storage battery box includes inner surface layer, structural layer, flame retardant coating and extexine, and inner surface layer, structural layer, flame retardant coating and extexine are in proper order from inside to outside, and open on the lateral wall of the storage battery box has the chamber door, and the chamber door is installed together with the storage battery box through the hinge, is equipped with the lock between chamber door and the storage battery box, and it has the louvre to open on the chamber door, and the heat dissipation is downthehole to be fixed with the filter screen, is equipped with the protection casing on the louvre, installs fixed net cage in the storage battery box, and fixed net cage is overhead to have the storage battery, installs temperature and humidity sensor on the top surface of storage battery box inner wall; the utility model discloses in, through the humiture of temperature and humidity sensor real time monitoring battery box to dispel the heat through the louvre, prevent that the high temperature in the battery box and cause the storage battery short circuit, the filter screen is used for preventing debris from blowing in the battery box, and the protection casing can effectively avoid the rainwater to get into the battery box, has improved the safety degree of battery box.
Description
Technical Field
The utility model relates to a fire prevention storage battery car field of making specifically is a fire prevention automatic control generation drives storage battery car.
Background
The battery car is also called as an 'electric car', which is a pure electric motor vehicle driven by a motor (direct current, alternating current, series excitation and independent excitation) and powered by a storage battery (battery), and is widely popularized in China in recent years, the domestic battery car is mainly used for sightseeing passenger carrying, public security patrol and cargo handling, the electric sightseeing car is mainly used for carrying passengers in places such as parks, scenic spots, leisure resort, universities, hospitals, golf courses, real estate companies and the like, the electric patrol car is mainly used for public security patrol in station squares and places with dense pedestrian flow, the electric carrying car is mainly used for supplying power to storage batteries used in factories, ports, docks, logistics warehouses and the like, the storage batteries in the current market are all powered by the power supply capacity, the storage batteries are overheated to melt an insulating layer or the lines are aged to cause short circuit when being charged, when the storage battery is in short circuit, the storage battery does not have automatic power off, so that the electric wire is over-current heated to ignite surrounding combustible substances, and a fire disaster occurs, particularly in high-temperature weather, the vehicle is stored outdoors for a long time or the storage battery works, spontaneous combustion is easily caused due to overhigh temperature, and property loss and even casualties are caused.
Therefore, the inventor provides the flame-proof self-control designated driving battery car by integrating various factors.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fire prevention automatic control is for driving storage battery car to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a flame-proof self-control designated driving battery car comprises a battery box fixed on the battery car, wherein a box door is arranged on the side wall of the battery box, the box door is installed with the battery box through a hinge, a lock is arranged between the box door and the battery box, a heat dissipation hole is formed in the box door, a filter screen is fixed in the heat dissipation hole, a protective cover is arranged on the heat dissipation hole, a fixed net cage is installed in the battery box, a battery is arranged on the fixed net cage, and a temperature and humidity sensor is installed on the top surface of the inner wall of the battery box; the utility model discloses in, through the humiture of temperature and humidity sensor real time monitoring battery box to dispel the heat through the louvre, prevent that the high temperature in the battery box and cause the storage battery short circuit, the filter screen is used for preventing debris from blowing in the battery box, and the protection casing can effectively avoid the rainwater to get into the battery box, has improved the safety degree of battery box.
As a further aspect of the present invention: the tank wall of battery box includes inner skin, structural layer, flame retardant coating and extexine, the extexine is in the outside, and the material of extexine is synthetic resin and glass fiber, and the extexine covers the flame retardant coating, the material of flame retardant coating is the polyurethane material, flame retardant coating cover structure layer, the structural layer material is synthetic resin and glass fiber, and the structural layer covers the inner skin, the material on inner skin is synthetic resin.
As a further aspect of the present invention: open on the lateral wall of storage battery case has the ventilation groove, installs the fan in the ventilation groove, and opens on the outer wall in ventilation groove and have the vent, is fixed with the filter screen in the vent, is equipped with the protection casing on the vent, and when the temperature was high in the storage battery case, cooled down the storage battery case through the fan, can effectively reduce the temperature of storage battery incasement, improved the security.
As a further aspect of the present invention: a buffer device is arranged on a fixed net cage in the storage battery box and comprises a buffer spring and a buffer screen plate, one end of the buffer spring is fixed on the fixed net cage, the other end of the buffer spring is fixed on the buffer screen plate, and the buffer screen plate is attached to the storage battery; impact between the storage battery and the fixed net cage can be effectively buffered through the buffer device, small parts in the storage battery box are prevented from being damaged, safety guarantee is improved, and the service life is prolonged.
As a further aspect of the present invention: the fixed net cage comprises a fixed box and a movable plate, the movable plate is mounted with the fixed box through a fixing device, the fixing device comprises a rotary column, a fixed threaded rod and a fixed valve, a fixing groove is formed in the bottom surface of the fixed box, the rotary column is arranged in the fixing groove, the fixed plate is immersed in the fixing groove and fixed together with the rotary column, the fixed valve is fixed at one end of the fixed threaded rod, the other end of the fixed threaded rod is immersed in the fixing groove, and the fixed net cage and the buffering net plate are made of stainless steel.
As a further aspect of the present invention: the utility model discloses a storage battery box, including fixed box with a net, supporting leg below is fixed with the supporting leg, and the supporting leg below is equipped with damping device, damping device includes shock attenuation box, damping spring and damping rubber circle, and the shock attenuation box is fixed on the bottom surface of storage battery box inner wall, and the top surface opening of shock attenuation box, the supporting leg submerges in the shock attenuation box, and damping spring's one end is fixed on the inner wall of shock attenuation box, and damping spring's the other end is fixed on the bottom surface of supporting leg, and the damping rubber circle is arranged in between shock attenuation box and the supporting leg, and the damping rubber circle is fixed at shock attenuation box top surface opening part.
As a further aspect of the present invention: a temperature and humidity sensor is arranged on the top surface of the inner wall of the storage battery box
Compared with the prior art, the utility model discloses the beneficial effect of following several aspects has:
1. the utility model provides a fire-proof automatic control generation drives storage battery car, the structure sets up ingenious and arranges rationally, in the utility model, through the humiture in the humiture sensor real time monitoring storage battery box to dispel the heat through the louvre, prevent that the temperature in the storage battery box is too high and cause the storage battery short circuit, the filter screen is used for preventing debris from blowing in the storage battery box, the protection casing can effectively avoid the rainwater to get into the storage battery box, has improved the safety degree of storage battery box;
2. the utility model further designs a buffer device, which can effectively buffer the impact between the storage battery and the fixed net cage, prevent the damage of the small parts in the storage battery box, improve the safety guarantee and prolong the service life;
3. the utility model further designs a fixing device, the storage battery is arranged in the fixed box, the movable plate is pulled up, the fixed threaded rod horizontally moves along the fixed groove by rotating the fixed valve, and the rotary column is fixed in the fixed groove, so that the movable plate and the fixed box are fixed together, and the operation is simple and convenient;
4. the utility model discloses a damping device has further designed, and damping spring can cushion the vibration that the storage battery car produced when ground motion, makes the storage battery install more firm in the storage battery case, can prevent effectively that storage battery and storage battery incasement wall from colliding with and causing the damage, has improved the security.
Drawings
Fig. 1 is a schematic structural diagram of a flame-retardant self-control designated-driving battery car.
Fig. 2 is a schematic structural view of a battery box wall in a flame-proof self-control designated-driving battery car.
Fig. 3 is a schematic structural diagram of a fixing device in a flame-retardant self-control designated-driving battery car.
Fig. 4 is a schematic structural diagram of a damping device in a flame-retardant self-control designated-driving battery car.
In the figure: 1. a battery box; 11. a box door; 12. a fan; 13. a protective cover; 14. a temperature and humidity sensor; 15. a ventilation slot; 16. an inner surface layer; 17. a structural layer; 18. a fire barrier layer; 19. an outer skin layer; 2. fixing the net cage; 21. a fixed box; 211. fixing grooves; 22. a movable plate; 23. supporting legs; 24. a fixing device; 241. a spin column; 242. fixing a threaded rod; 243. fixing the valve; 25. a buffer device; 251. a buffer spring; 252. buffering the screen plate; 26. a damping device; 261. a shock-absorbing box; 262. a damping spring; 263. a damping rubber ring; 3. and a battery jar.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Referring to fig. 1-4, a fire-proof self-control designated-driving battery car comprises a battery box 1, a fixed net cage 2 and a battery 3; the battery box 1 comprises a battery box body, a box door 11, a fan 12, a protective cover 13 and a temperature and humidity sensor 14, wherein the box door 11 is installed on the side wall of the battery box 1 through a hinge, a lock is arranged between the box door 11 and the battery box 1, heat dissipation holes are formed in the box door 11, a ventilation groove 15 is formed in the side wall of the battery box 1, the fan 12 is fixed in the ventilation groove 15 through bolts, a ventilation opening is formed in the outer wall of the ventilation groove 15, filter screens are fixed in the heat dissipation holes and the ventilation opening, the protective cover 13 is fixed above the heat dissipation holes and the ventilation opening, and the temperature and humidity sensor 14 is fixed on the top surface of the inner wall of the battery box 1 through bolts;
the wall of the battery box 1 comprises an inner surface layer 16, a structural layer 17, a fireproof layer 18 and an outer surface layer 19, wherein the outer surface layer 19 is arranged on the outermost side, the outer surface layer 19 is made of synthetic resin and glass fiber, the outer surface layer 19 covers the fireproof layer 18, the fireproof layer 18 is made of polyurethane material, the fireproof layer 18 covers the structural layer 17, the structural layer 17 is made of synthetic resin and glass fiber, the structural layer 17 covers the inner surface layer 16, and the inner surface layer 16 is made of synthetic resin;
the fixed net cage 2 comprises a fixed box 21, a movable plate 22, supporting legs 23, a fixing device 24, a buffering device 25 and a damping device 26, the fixing device 24 comprises a rotary column 241, a fixed threaded rod 242 and a fixed valve 243, the bottom surface of the fixed box 21 is provided with the fixing groove 211, the rotary column 241 is arranged in the fixing groove 211, the fixing plate is immersed in the fixing groove 211 and fixed with the rotary column 241, the fixed valve 243 is fixed at one end of the fixed threaded rod 242, the other end of the fixed threaded rod 242 is immersed in the fixing groove 211, and the fixed net cage 2 and the buffering net plate 252 are both made of stainless steel;
the buffer device 25 comprises a buffer spring 251 and a buffer screen plate 252, wherein one end of the buffer spring 251 is fixed on the fixed net cage 2 through a bolt, and the other end of the buffer spring 251 is fixed on the buffer screen plate 252 through welding;
the supporting leg 23 is fixed on the bottom surface of the fixing box 21 by welding, the damping device 26 comprises a damping box 261, a damping spring 262 and a damping rubber ring 263, the damping box 261 is fixed on the bottom surface of the inner wall of the battery box 1 by welding, the top surface of the damping box 261 is open, the supporting leg 23 is immersed in the damping box 261, one end of the damping spring 262 is fixed on the inner wall of the damping box 261 by welding, the other end of the damping spring 262 is fixed on the bottom surface of the supporting leg 23 by welding, the damping rubber ring 263 is arranged between the damping box 261 and the supporting leg 23, and the damping rubber ring 263 is fixed on the opening of the top surface of the damping box 261 by bolts;
the storage battery 3 is arranged in the fixed net cage 2, and the side wall of the storage battery 3 is attached to the buffer net plate 252.
The utility model discloses a theory of operation is: in the utility model, the temperature and the humidity in the battery box 1 are monitored in real time through the temperature and humidity sensor 14, heat dissipation is performed through the heat dissipation holes, the short circuit of the battery 3 caused by overhigh temperature in the battery box 1 is prevented, the filter screen is used for preventing sundries from being blown into the battery box 1, the protective cover 13 can effectively prevent rainwater from entering the battery box 1, and the safety degree of the battery box 1 is improved; the battery 3 is placed in the fixed box 21, the movable plate 22 is pulled up, the fixed threaded rod 242 horizontally moves along the fixed groove 211 by rotating the fixed valve 243, the rotating column 241 is fixed in the fixed groove 211, and the movable plate 22 and the fixed box 21 are fixed together, so that the operation is simple and convenient; the buffer device 25 can effectively buffer the impact between the battery 3 and the fixed net cage 2, prevent the damage of small parts in the battery box 1, improve the safety guarantee and prolong the service life; damping spring 262 can cushion the vibration that the storage battery car produced when ground motion, makes storage battery 3 install more firmly in storage battery case 1, can prevent effectively that storage battery 3 from colliding with and causing the damage with 1 inner wall of storage battery case, has improved the security.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (5)
1. The utility model provides a fire prevention automatic control generation is driven storage battery car, is including fixing storage battery case (1) on the storage battery car, its characterized in that, it has chamber door (11) to open on the lateral wall of storage battery case (1), and chamber door (11) are in the same place through hinge and storage battery case (1) installation, is equipped with the lock between chamber door (11) and storage battery case (1), and it has the louvre to open on chamber door (11), and the louvre internal fixation has the filter screen, is equipped with protection casing (13) on the louvre, installs fixed net cage (2) in storage battery case (1), and fixed net cage (2) overhead has storage battery (3), installs temperature and humidity sensor (14) on the top surface of storage battery case (1) inner wall.
2. The anti-flaming automatic-control designated-driving battery car as claimed in claim 1, wherein a ventilation groove (15) is formed in the side wall of the battery box (1), a fan (12) is installed in the ventilation groove (15), a ventilation opening is formed in the outer wall of the ventilation groove (15), a filter screen is fixed in the ventilation opening, and a protective cover (13) is arranged on the ventilation opening.
3. The anti-flaming automatic control designated-driving battery car as claimed in claim 2, wherein a buffer device (25) is arranged on a fixed net cage (2) in the battery box (1), the buffer device (25) comprises a buffer spring (251) and a buffer net plate (252), one end of the buffer spring (251) is fixed on the fixed net cage (2), the other end of the buffer spring (251) is fixed on the buffer net plate (252), and the buffer net plate (252) is attached to the battery (3).
4. The anti-combustion automatic-control designated-driving battery car as claimed in claim 3, wherein the fixed net cage (2) comprises a fixed box (21) and a movable plate (22), the movable plate (22) is mounted with the fixed box (21) through a fixing device (24), the fixing device (24) comprises a rotary column (241), a fixed threaded rod (242) and a fixed valve (243), a fixing groove (211) is formed in the bottom surface of the fixed box (21), the rotary column (241) is placed in the fixing groove (211), the fixing plate is immersed in the fixing groove (211) and fixed with the rotary column (241), the fixed valve (243) is fixed at one end of the fixed threaded rod (242), the other end of the fixed threaded rod (242) is immersed in the fixing groove (211), and the fixed net cage (2) and the buffer mesh plate (252) are both made of stainless steel.
5. The anti-flaming automatic-control modern-driving battery car as claimed in claim 4, wherein supporting legs (23) are fixed below the fixed net cage (2), a damping device (26) is arranged below the supporting legs (23), the damping device (26) comprises a damping box (261), a damping spring (262) and a damping rubber ring (263), the damping box (261) is fixed on the bottom surface of the inner wall of the battery box (1), the top surface of the damping box (261) is open, the supporting legs (23) are immersed in the damping box (261), one end of the damping spring (262) is fixed on the inner wall of the damping box (261), the other end of the damping spring (262) is fixed on the bottom surface of the supporting legs (23), the damping rubber ring (263) is arranged between the damping box (261) and the supporting legs (23), and the damping rubber ring (263) is fixed at the opening of the top surface of the damping box (261).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120131439.3U CN215299339U (en) | 2021-01-19 | 2021-01-19 | Fire-proof self-control designated driving battery car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120131439.3U CN215299339U (en) | 2021-01-19 | 2021-01-19 | Fire-proof self-control designated driving battery car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215299339U true CN215299339U (en) | 2021-12-24 |
Family
ID=79529691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120131439.3U Expired - Fee Related CN215299339U (en) | 2021-01-19 | 2021-01-19 | Fire-proof self-control designated driving battery car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215299339U (en) |
-
2021
- 2021-01-19 CN CN202120131439.3U patent/CN215299339U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107546622A (en) | A kind of outdoor water-proof power distribution cabinet for distribution system | |
| CN207266466U (en) | A kind of communication equipment protective housing | |
| CN215299339U (en) | Fire-proof self-control designated driving battery car | |
| CN105246278A (en) | Liftable underground integrated cabinet | |
| KR102287934B1 (en) | Car-ferry powered by the electric energy | |
| CN209938359U (en) | New energy automobile fills electric pile | |
| CN209546187U (en) | A kind of communication information equipment heat radiation protection case | |
| CN111956974A (en) | Protective cover, electric bicycle charging protective equipment and control method | |
| CN218299514U (en) | Lightning-proof and fireproof efficient energy-saving transformer | |
| CN115579216A (en) | Electrochemical prefabricated cabin type energy storage transformer | |
| CN214138250U (en) | Pantograph with self preservation protects device | |
| CN115459086A (en) | Safety protection electric power cabinet | |
| CN206498094U (en) | A kind of box-type substation | |
| CN201821105U (en) | Box type reactor | |
| CN213510276U (en) | Automatic door closing structure of explosion door | |
| CN211792425U (en) | Electrical control cabinet with excellent explosion-proof performance | |
| CN113241594A (en) | Outdoor box-type substation of high protection type | |
| CN208411388U (en) | A kind of fixation device for the dedicated refrigerator of electric vehicle | |
| CN215971178U (en) | Fill electric pile with oneself protect function | |
| CN215269318U (en) | But remote operation's thermal diffusivity street lamp switch board | |
| CN213426787U (en) | High-temperature alarm control box | |
| CN216699251U (en) | Electric cabinet for building site that can dispel heat | |
| CN209893031U (en) | Storage device based on high-definition monitoring system | |
| CN209913286U (en) | Safe type cubical switchboard | |
| CN221113585U (en) | Charging control system for charging pile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211224 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |