CN205970906U - Low pressure circuit control device and vehicle - Google Patents
Low pressure circuit control device and vehicle Download PDFInfo
- Publication number
- CN205970906U CN205970906U CN201620919285.3U CN201620919285U CN205970906U CN 205970906 U CN205970906 U CN 205970906U CN 201620919285 U CN201620919285 U CN 201620919285U CN 205970906 U CN205970906 U CN 205970906U
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- power supply
- low pressure
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- 238000012790 confirmation Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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
- 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
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The utility model discloses a low pressure circuit control device and vehicle, controlling means includes: detection module for the detection connection confirmation signal that charges, the connection confirmation signal that charges is used for showing that the direct current of charging device and vehicle charges mouthful is connected, control module, with detection module connects, is used for detection module detects under the condition of connection confirmation signal of charging, the work of control low pressure auxiliary electrical power source, the executable module, with control module connects, is used for control module control under the condition of low pressure auxiliary electrical power source work, will the low pressure power supply of vehicle is switched extremely by the battery low pressure auxiliary electrical power source. , can avoid under the condition of charge time overlength from this, use the battery insufficient voltage problem that low -voltage component caused to the residual capacity who guarantees the battery can the normal boot vehicle. Simultaneously, avoid the battery to work under the insufficient voltage state, can also lengthen its life.
Description
Technical field
This utility model is related to electric vehicle field, in particular it relates to a kind of low-voltage circuit control device and vehicle.
Background technology
Continual mileage is the main restricting factor of electric vehicle development, in order to lift this performance, typically can increase power
The electricity of battery.The charging interval that the electricity of electrokinetic cell increases needed for rear vehicle also can increase therewith.Especially in environment temperature
When spending relatively low, in such as winter, its charging current that can bear of electrokinetic cell temperature influence will be less than under home, electric motor car
Charging interval can be longer.
In the charging process of electric vehicle, accumulator is as the low-voltage power supply of vehicle, the low pressure unit device in vehicle
Part is by storage battery power supply, if the charging interval of electric vehicle is elongated, accumulator may occur the situation of power shortage.Electric power storage
Power shortage in pond can be so that vehicle cannot start, and low-voltage component cannot normal work.In addition accumulator is often in power shortage
State, also can shorten its service life.
Utility model content
The purpose of this utility model is to provide a kind of low-voltage control circuit and vehicle, so that the accumulator of electric vehicle will not
Power shortage situation occurs during Vehicular charging.
To achieve these goals, according to one side of the present utility model, the utility model discloses a kind of low-voltage circuit
Control device, described control device includes：
Detection module, for detecting charging connection confirmation signal, described charging connection confirmation signal is used for representing the dress that charges
Put and be connected with the DC charging mouth of vehicle；
Control module, is connected with described detection module, confirms for described charging connection is detected in described detection module
In the case of signal, control the work of low pressure accessory power supply；
Performing module, is connected with described control module, for controlling described low pressure accessory power supply work in described control module
In the case of work, the low-voltage power supply of described vehicle is switched to described low pressure accessory power supply by accumulator.
Alternatively, described performing module includes：
Relay and the normally closed switch associating with described relay；
Wherein, one end of described normally closed switch connects the positive pole of described accumulator, and the other end is just connecting low-voltage component
Pole, described relay is connected with described low pressure accessory power supply, the positive pole of described low pressure accessory power supply and the positive pole of described accumulator
Connect, the negative pole of described low pressure accessory power supply is connected with the negative pole of described accumulator.
Alternatively, described performing module also includes diode, and the positive pole of described low pressure accessory power supply is via described diode
Connect the positive pole of described accumulator；
The positive pole of described diode connects the positive pole of described low pressure accessory power supply, and the negative pole of described diode connects described storage
The positive pole of battery.
Alternatively, described control module is configured to by the closure of control described low pressure accessory power supply switch to control
State the work of low pressure accessory power supply.
According to another aspect of the present utility model, a kind of vehicle is also disclosed, described vehicle includes：
Low-voltage circuit control device in this utility model embodiment；
Battery management system, is connected with described low-voltage circuit control device, for detecting whether vehicle charges, and in detection
In the case of being connected to charging device with the DC charging mouth of described vehicle, generate charging connection confirmation signal；
Low pressure accessory power supply, is connected with described low-voltage circuit control device, in described low-voltage circuit control device
Low-tension supply is provided for described vehicle under control.
Alternatively, described vehicle also includes：Low pressure accessory power supply switchs, with described low-voltage circuit control device and described low
Pressure accessory power supply connects, for activating described low pressure accessory power supply under the control of described low-voltage circuit control device.
By technique scheme, low-voltage circuit control device and vehicle disclosed in this utility model, vehicle is being detected
It is currently in use in the case that DC charging device is charged, control the work of low pressure accessory power supply, by the low-voltage power supply electricity of vehicle
Source switches to low pressure accessory power supply by accumulator.Disconnect the connection of vehicle mesolow components and parts and accumulator, assisted using low pressure
Power supply is powered for low-voltage component, to avoid the accumulator in the case that the charging interval is long, causing using low-voltage component
Power shortage problem, thus ensure that the dump energy of accumulator can normally start vehicle.Simultaneously, it is to avoid accumulator is under power shortage state
Work is moreover it is possible to extend its service life.
Other feature and advantage of the present utility model will be described in detail in subsequent specific embodiment part.
Brief description
Accompanying drawing is used to provide and further understands to of the present utility model, and constitutes a part for description, and following
Specific embodiment be used for together explaining this utility model, but do not constitute to restriction of the present utility model.In the accompanying drawings：
Fig. 1 is the structured flowchart of the low-voltage circuit control device being provided according to a kind of embodiment of the present utility model；
Fig. 2 is to be shown according to the annexation of each components and parts in a kind of performing module of embodiment offer of the present utility model
It is intended to；
Fig. 3 is the connection signal between each device in the vehicle being provided according to a kind of embodiment of the present utility model
Figure；
Fig. 4 is that the connection between each device in the vehicle according to another embodiment of the present utility model offer is shown
It is intended to.
Description of reference numerals
10 low-voltage circuit control device 100 detection module
200 control module 300 performing module
ZT1 relay ZT11Normally closed switch
D1 diode 20 low pressure accessory power supply
30 accumulator 40 low-voltage component
50 battery management system 60 low pressure accessory power supply switchs
Specific embodiment
Below in conjunction with accompanying drawing, specific embodiment of the present utility model is described in detail.It should be appreciated that herein
Described specific embodiment is merely to illustrate and explains this utility model, is not limited to this utility model.
According to one side of the present utility model, a kind of low-voltage circuit control device is disclosed, Fig. 1 is according to of the present utility model
A kind of structured flowchart of the low-voltage circuit control device that embodiment provides.As shown in figure 1, low-voltage circuit control device 10 can wrap
Include：Detection module 100, for detecting charging connection confirmation signal, charging connection confirmation signal is used for representing charging device and car
DC charging mouth connect；Control module 200, is connected with detection module 100, for charging is detected in detection module 100
In the case of connecting confirmation signal, control the work of low pressure accessory power supply；Performing module 300, is connected with control module 200, is used for
In the case that control module 200 controls the work of low pressure accessory power supply, the low-voltage power supply of vehicle is switched to by accumulator
Low pressure accessory power supply.
The charge port of generally vehicle have fill soon mouth and trickle charge mouth point, filling mouth soon is the use of DC source to be Vehicular charging
Charge port, trickle charge mouth is the charge port using alternating current power supply for Vehicular charging.The mouth that fills soon of vehicle is provided with low pressure auxiliary
Power supply, when vehicle is currently in use DC source and charges, this low pressure accessory power supply can export the low tension of e.g. 12V, 24V
Signal.The low-voltage component normal work of electric vehicle provides electric energy, the low-voltage component in vehicle by the accumulator of vehicle
Vehicle management system (Vehicle Management System, VMS), battery management system (Battery can be included
Management System, BMS) and USB interface etc..And the low pressure accessory power supply filling mouth soon is only used as signal source, for swashing
Live VMS and BMS.Low-voltage circuit control device disclosed in this utility model using low pressure accessory power supply as vehicle in DC charging
When low-voltage power supply use, not only can power for low-voltage component, can be also used for activation VMS and BMS so as to enter
Enter working condition.
Wherein, exemplarily, the charging connection confirmation signal that detection module 100 is detected may come from BMS, BMS energy
Enough generation charging connection confirmation signals after the completion of charging device such as charging gun is connected with the charge port of vehicle.
By technique scheme, low-voltage circuit control device and vehicle disclosed in this utility model, vehicle is being detected
It is currently in use in the case that DC charging device is charged, control the work of low pressure accessory power supply, by the low-voltage power supply electricity of vehicle
Source switches to low pressure accessory power supply by accumulator.Disconnect the connection of vehicle mesolow components and parts and accumulator, assisted using low pressure
Power supply is powered for low-voltage component, to avoid the accumulator in the case that the charging interval is long, causing using low-voltage component
Power shortage problem, thus ensure that the dump energy of accumulator can normally start vehicle.Simultaneously, it is to avoid accumulator is under power shortage state
Work is moreover it is possible to extend its service life.
Fig. 2 is to be shown according to the annexation of each components and parts in a kind of performing module of embodiment offer of the present utility model
It is intended to.Alternatively, as shown in Fig. 2 performing module 300 can include：Relay ZT1 and normally closed with what relay ZT1 associated
Switch ZT11；Wherein, normally closed switch ZT11One end connect accumulator 30 positive pole, the other end connect low-voltage component 40 just
Pole, relay ZT1 is connected with low pressure accessory power supply 20, and the positive pole of low pressure accessory power supply 20 is connected with the positive pole of accumulator 30, low
The negative pole of pressure accessory power supply 20 is connected with the negative pole of accumulator 30.
Exemplarily, performing module 300 can be by the relay ZT1 and normally closed switch ZT1 associating with this relay ZT11
Composition, after control module 200 controls low pressure accessory power supply 20 work, the relay ZT1's being connected with low pressure accessory power supply 20
Coil electricity, normally-closed contact ZT11Will disconnect because of electromagnetic induction, the circuit between accumulator 30 and low-voltage component 40 is
It is disconnected.Vehicle is may act as the low pressure accessory power supply 20 that signal source is connected with low-voltage component 40 in prior art
Low-voltage power supply, is that low-voltage component 40 is powered.The two-stage of low pressure accessory power supply 20 two-stage with accumulator 30 respectively simultaneously
Connect, can also be in the not enough power supply of accumulator 30, for its charging.
Thus, when electric vehicle is when charging, low-voltage circuit control device disclosed in this utility model can be by using
The simple, relay of reliable effect and normally closed switch associate with relay are installed, to reach be effectively disconnected from accumulator and
Circuit between low-voltage component connects, and the low-voltage power supply of vehicle is switched to the mesh of low pressure accessory power supply by accumulator
's.It will be understood however, that low-voltage power supply is switched in this utility model the side of low pressure accessory power supply by accumulator
Formula is not limited to this, and the embodiment that other are capable of this function falls within protection domain of the present utility model, for example, use
Relay and the single-pole double-throw switch (SPDT) associating with relay to complete the function that low-voltage power supply switches.
Alternatively, as shown in Fig. 2 performing module 300 can also include diode D1, the positive pole warp of low pressure accessory power supply 20
Connect the positive pole of accumulator 30 by diode D1；The positive pole of diode D1 connects the positive pole of low pressure accessory power supply 20, diode D1
Negative pole connect accumulator 30 positive pole.
Because low pressure accessory power supply is connected with accumulator via the mouth that fills soon of vehicle, and the mouth that fills soon of vehicle is typically to expose
In natural environment, when uncharged, accumulator can make it be energized with filling mouth soon and being connected, and the use safety of mouth is filled in impact soon.For
Avoid vehicle when uncharged, the electric energy of accumulator output can affect to fill soon the use safety of mouth, exemplarily, in low pressure auxiliary
Diode D1 is set between power supply 20 and accumulator 30.The positive pole of D1 is connected with the positive pole of low pressure accessory power supply 20, the negative pole of D1
It is connected with the positive pole of accumulator 30.So, in Vehicular charging, filling mouthful voltage at low pressure accessory power supply end soon is higher than accumulator terminal
Voltage, low pressure accessory power supply can charge for accumulator；And when vehicle is uncharged, the voltage of accumulator terminal is higher than to fill mouth soon
Voltage, the electric energy of accumulator output cannot reach and fill mouth soon, thereby may be ensured that the use safety filling mouth soon.
Alternatively, control module 200 is configured to control low pressure auxiliary by the closure controlling low pressure accessory power supply switch
Power supply 20 is helped to work.
In one embodiment, control module 200 detects the situation of charging connection confirmation signal in detection module 100
Under, control low pressure accessory power supply switch closure, so that low pressure accessory power supply is powered for the relay ZT1 in performing module 300.If
Set low pressure accessory power supply switch can be increase protective barrier using low pressure accessory power supply so that low pressure accessory power supply using more
Plus safety.
By technique scheme, low-voltage circuit control device and vehicle disclosed in this utility model, vehicle is being detected
It is currently in use in the case that DC charging device is charged, control the work of low pressure accessory power supply, by the low-voltage power supply electricity of vehicle
Source switches to low pressure accessory power supply by accumulator.Disconnect the connection of vehicle mesolow components and parts and accumulator, assisted using low pressure
Power supply is powered for low-voltage component, to avoid the accumulator in the case that the charging interval is long, causing using low-voltage component
Power shortage problem, thus ensure that the dump energy of accumulator can normally start vehicle.Simultaneously, it is to avoid accumulator is under power shortage state
Work is moreover it is possible to extend its service life.
According to another aspect of the present utility model, also disclose a kind of vehicle, Fig. 3 is according to of the present utility model a kind of real
The connection diagram between each device in the vehicle that the mode of applying provides.As shown in figure 3, this vehicle can include：This practicality
New disclosed low-voltage circuit control device 10；Battery management system 50, is connected with low-voltage circuit control device 10, for detecting
Whether vehicle charges, and is detecting in the case that charging device is connected with the DC charging mouth of vehicle, generates charging connection true
Recognize signal；Low pressure accessory power supply 20, is connected with low-voltage circuit control device 10, for the control in low-voltage circuit control device 10
Under for vehicle provide low-tension supply.
Wherein, battery management system 50 can detect the connection of charging device and the DC charging mouth of vehicle, wherein fills
Electric installation may, for example, be the charging gun of configuration on charging pile.When DC charging mouth physical connection charging gun and vehicle is detected
After the completion of, battery management system 50 can generate charging connection confirmation signal.
By technique scheme, low-voltage circuit control device and vehicle disclosed in this utility model, vehicle is being detected
It is currently in use in the case that DC charging device is charged, control the work of low pressure accessory power supply, by the low-voltage power supply electricity of vehicle
Source switches to low pressure accessory power supply by accumulator.Disconnect the connection of vehicle mesolow components and parts and accumulator, assisted using low pressure
Power supply is powered for low-voltage component, to avoid the accumulator in the case that the charging interval is long, causing using low-voltage component
Power shortage problem, thus ensure that the dump energy of accumulator can normally start vehicle.Simultaneously, it is to avoid accumulator is under power shortage state
Work is moreover it is possible to extend its service life.
Fig. 4 is that the connection between each device in the vehicle according to another embodiment of the present utility model offer is shown
It is intended to.Alternatively, as shown in figure 4, this vehicle can also include：Low pressure accessory power supply switch 60, with low-voltage circuit control device
10 and low pressure accessory power supply 20 connect, under the control of low-voltage circuit control device 10 activate low pressure accessory power supply 20.
Setting low pressure accessory power supply switch can better control over low pressure accessory power supply, is judging that vehicle needs to use low pressure
During accessory power supply, ability closed low accessory power supply switchs.The use low pressure accessory power supply that user is safer not only can be helped, also
Electric energy can be saved.
By technique scheme, low-voltage circuit control device and vehicle disclosed in this utility model, vehicle is being detected
It is currently in use in the case that DC charging device is charged, control the work of low pressure accessory power supply, by the low-voltage power supply electricity of vehicle
Source switches to low pressure accessory power supply by accumulator.Disconnect the connection of vehicle mesolow components and parts and accumulator, assisted using low pressure
Power supply is powered for low-voltage component, to avoid the accumulator in the case that the charging interval is long, causing using low-voltage component
Power shortage problem, thus ensure that the dump energy of accumulator can normally start vehicle.Simultaneously, it is to avoid accumulator is under power shortage state
Work is moreover it is possible to extend its service life.
Describe preferred implementation of the present utility model above in association with accompanying drawing in detail, but, this utility model does not limit
Detail in above-mentioned embodiment, in range of the technology design of the present utility model, can be to skill of the present utility model
Art scheme carries out multiple simple variant, and these simple variant belong to protection domain of the present utility model.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, this utility model is to each
Plant possible compound mode no longer separately to illustrate.
Additionally, combination in any can also be carried out, as long as it is not disobeyed between various different embodiment of the present utility model
Carry on the back thought of the present utility model, it equally should be considered as content disclosed in the utility model.
Claims (6)
1. a kind of low-voltage circuit control device is it is characterised in that described control device includes：
Detection module, for detecting charging connection confirmation signal, described charging connection confirmation signal be used for representing charging device with
The DC charging mouth of vehicle connects；
Control module, is connected with described detection module, for described charging connection confirmation signal is detected in described detection module
In the case of, control the work of low pressure accessory power supply；
Performing module, is connected with described control module, for controlling described low pressure accessory power supply work in described control module
In the case of, the low-voltage power supply of described vehicle is switched to described low pressure accessory power supply by accumulator.
2. control device according to claim 1 is it is characterised in that described performing module includes：Relay and with institute
State the normally closed switch of relay association；
Wherein, one end of described normally closed switch connects the positive pole of described accumulator, and the other end connects the positive pole of low-voltage component, institute
State relay to be connected with described low pressure accessory power supply, the positive pole of described low pressure accessory power supply is connected with the positive pole of described accumulator,
The negative pole of described low pressure accessory power supply is connected with the negative pole of described accumulator.
3. control device according to claim 2 is it is characterised in that described performing module also includes diode, described low
The positive pole of pressure accessory power supply connects the positive pole of described accumulator via described diode；
The positive pole of described diode connects the positive pole of described low pressure accessory power supply, and the negative pole of described diode connects described accumulator
Positive pole.
4. the control device according to any one of claim 1-3 claim is it is characterised in that described control module quilt
It is configured to control described low pressure accessory power supply work by the closure controlling described low pressure accessory power supply switch.
5. a kind of vehicle is it is characterised in that described vehicle includes：
Low-voltage circuit control device according to any one of claim 1-4；
Battery management system, is connected with described low-voltage circuit control device, for detecting whether vehicle charges, and fills detecting
In the case that electric installation is connected with the DC charging mouth of described vehicle, generate charging connection confirmation signal；
Low pressure accessory power supply, is connected with described low-voltage circuit control device, for the control in described low-voltage circuit control device
Under for described vehicle provide low-tension supply.
6. vehicle according to claim 5 is it is characterised in that described vehicle also includes：Low pressure accessory power supply switchs, with institute
State low-voltage circuit control device and described low pressure accessory power supply connects, for swashing under the control of described low-voltage circuit control device
Described low pressure accessory power supply alive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620919285.3U CN205970906U (en) | 2016-08-22 | 2016-08-22 | Low pressure circuit control device and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620919285.3U CN205970906U (en) | 2016-08-22 | 2016-08-22 | Low pressure circuit control device and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205970906U true CN205970906U (en) | 2017-02-22 |
Family
ID=58033028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620919285.3U Expired - Fee Related CN205970906U (en) | 2016-08-22 | 2016-08-22 | Low pressure circuit control device and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205970906U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107487212A (en) * | 2017-06-19 | 2017-12-19 | 宝沃汽车（中国）有限公司 | Charging method, charging device and the electric automobile of electric automobile |
| CN108964181A (en) * | 2018-07-16 | 2018-12-07 | 东莞市德尔能新能源股份有限公司 | A kind of BMS charge control system that can be worked under low pressure power shortage state |
| CN113013970A (en) * | 2021-01-28 | 2021-06-22 | 浙江合众新能源汽车有限公司 | Electric automobile battery feed recovery system |
| CN115723576A (en) * | 2022-12-09 | 2023-03-03 | 潍柴动力股份有限公司 | Power shortage protection system, control method and device for vehicle low-voltage power supply |
-
2016
- 2016-08-22 CN CN201620919285.3U patent/CN205970906U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107487212A (en) * | 2017-06-19 | 2017-12-19 | 宝沃汽车（中国）有限公司 | Charging method, charging device and the electric automobile of electric automobile |
| CN108964181A (en) * | 2018-07-16 | 2018-12-07 | 东莞市德尔能新能源股份有限公司 | A kind of BMS charge control system that can be worked under low pressure power shortage state |
| CN113013970A (en) * | 2021-01-28 | 2021-06-22 | 浙江合众新能源汽车有限公司 | Electric automobile battery feed recovery system |
| CN115723576A (en) * | 2022-12-09 | 2023-03-03 | 潍柴动力股份有限公司 | Power shortage protection system, control method and device for vehicle low-voltage power supply |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Low voltage circuit control device and vehicle Effective date of registration: 20211213 Granted publication date: 20170222 Pledgee: BEIJING AUTOMOTIVE GROUP Co.,Ltd. Pledgor: Borgward Automotive (China) Co., Ltd. Registration number: Y2021990001167 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231201 Granted publication date: 20170222 Pledgee: BEIJING AUTOMOTIVE GROUP Co.,Ltd. Pledgor: Beijing baowo Automobile Co.,Ltd.|Borgward Automotive (China) Co., Ltd. Registration number: Y2021990001167 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170222 |
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| CF01 | Termination of patent right due to non-payment of annual fee |