CN202798466U - Isolated-type new energy power supply unit based on three-port power converter - Google Patents
Isolated-type new energy power supply unit based on three-port power converter Download PDFInfo
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- CN202798466U CN202798466U CN201220347523XU CN201220347523U CN202798466U CN 202798466 U CN202798466 U CN 202798466U CN 201220347523X U CN201220347523X U CN 201220347523XU CN 201220347523 U CN201220347523 U CN 201220347523U CN 202798466 U CN202798466 U CN 202798466U
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- 239000003990 capacitor Substances 0.000 claims abstract description 46
- 230000008878 coupling Effects 0.000 claims abstract description 42
- 238000010168 coupling process Methods 0.000 claims abstract description 42
- 238000005859 coupling reaction Methods 0.000 claims abstract description 42
- 230000000903 blocking effect Effects 0.000 claims description 9
- 238000004146 energy storage Methods 0.000 abstract description 7
- 238000001914 filtration Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 19
- 238000010586 diagram Methods 0.000 description 18
- 230000003071 parasitic effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses an isolated-type new energy power supply unit based on a three-port power converter. The isolated-type new energy power supply unit based on a three-port power converter is formed by mutual connection of a new energy battery, an energy storage, a reverse resistor diode, two coupling inductors, four main switch tubes, two clamping switch tubes, two clamping capacitors, two rectifier diode diodes and two filtering capacitors. The isolated-type new energy power supply unit based on a three-port power converter uses an interleaving and parallel structure to control the phase of the main switch tubes, thus realizing low ripple of the input current and being easy to realize the maximum power point tracing control of the new energy battery, and at the same time uses the active clamping structure to realize the soft switching of the main switch tubes so as to reduce the loss and improve the efficiency. In addition, the isolated-type new energy power supply unit based on a three-port power converter uses the load side two coupling inductor type cascade structure, thus being able to improve the boost capability. When the new energy battery works, the new energy battery can supply power for the load side and can supply power for a storage battery. When the new energy battery does not work, the load side can still be powered through the storage battery.
Description
Technical field
The utility model belongs to new forms of energy power conversion technology field, is specifically related to a kind of isolated form based on the new energy equipment of three port power inverters.
Background technology
In the new energy system, because the electric energy that new forms of energy produce all is the lower direct current of voltage, and (such as grid-connected system) needs the higher direct current of voltage in a lot of application scenarioss, so the new energy system all has power inverter low voltage and direct current is converted to suitable high-voltage direct-current electricity; In addition, power inverter also needs energy management and the control between responsible new forms of energy, storage battery, the load three.
The output voltage gain of conventional booster type (Boost) crisscross parallel DC-DC converter is less, the voltage stress of power switch pipe is larger, and power switch pipe is hard switching work, and switching loss is larger, the reverse recovery current of fly-wheel diode is larger, and reverse recovery loss is larger.In recent years, some soft switch circuits have in succession been studied, by being attached with the devices such as source power switch and passive inductance, electric capacity or realizing the soft switch of power switch pipe by devices such as additional diode and passive inductance, electric capacity.
Thereby in actual new energy system for realize being incorporated into the power networks or autonomous system in the continuation of energy need to add storage battery and realize schedulable system.Need a plurality of power transducer devices or multilevel device for this reason, thereby increased complexity and the cost of system's control.So traditional new energy system as shown in Figure 1, this system needs two cover power transducer devices to realize the power transfer of new forms of energy-storage battery, new forms of energy-load and storage battery-load; And a large amount of power conversion device costs is high, efficient is low.
As shown in Figure 2, the new energy system based on three port power inverters can well solve the many problems of conventional power converters part; Wherein typical a kind of structure as shown in Figure 3, the advantage of this circuit structure is that used switching tube is less, but shortcoming also clearly, major defect is as follows:
(1) so because be that single magnetic core structure through-put power is limited, utilizes this topological structure can not utilize in the larger occasion of power;
(2) so because the essence of this circuit is that half-bridge structure exists the secondary boost capability limited, thereby limited the application that this topological structure is had a meeting, an audience, etc. well under one's control and closed in promotion, for example input source is photovoltaic cell, fuel cell, and output loading is to be incorporated into the power networks or the inverter of independent operating;
(3) because the primary current ripple is larger, for example fuel cell or photovoltaic battery panel in the situation that needs control inputs source best operating point, this topology in control, will run into very large difficulty.
Summary of the invention
For the existing above-mentioned technological deficiency of prior art, the utility model provides the new energy equipment of a kind of isolated form based on three port power inverters, can realize the soft switch of switching tube, the primary current low ripple, and power conversion efficiency is high.
A kind of isolated form comprises based on the new energy equipment of three port power inverters: a new forms of energy battery, an energy accumulator, a reverse blocking diode, two coupling inductances, four main switches, two clamping switch tubes, two clamp capacitors, two rectifier diodes and two filter capacitors; Wherein:
The positive pole of new forms of energy battery links to each other with the anode of reverse blocking diode, the negative electrode of reverse blocking diode links to each other with the drain electrode of the first main switch and the drain electrode of the second main switch, the drain electrode of the source electrode of the first main switch and the 3rd main switch, the source electrode of the first clamping switch tube links to each other with the non-same polarity of the first coupling inductance primary coil, the drain electrode of the source electrode of the second main switch and the 4th main switch, the source electrode of the second clamping switch tube links to each other with the non-same polarity of the second coupling inductance primary coil, the source electrode of the 3rd main switch links to each other with the source electrode of the 4th main switch and the negative pole of energy accumulator, the drain electrode of the first clamping switch tube links to each other with an end of the first clamp capacitor, the drain electrode of the second clamping switch tube links to each other with an end of the second clamp capacitor, the other end of the negative pole of new forms of energy battery and the first clamp capacitor, the other end of the second clamp capacitor, the Same Name of Ends of the first coupling inductance primary coil, the Same Name of Ends of the second coupling inductance primary coil links to each other with the positive pole of energy accumulator;
The non-same polarity of the first coupling inductance secondary coil links to each other with the non-same polarity of the second coupling inductance secondary coil, the Same Name of Ends of the second coupling inductance secondary coil links to each other with the anode of the first rectifier diode and the negative electrode of the second rectifier diode, the Same Name of Ends of the first coupling inductance secondary coil links to each other with an end of the first filter capacitor and an end of the second filter capacitor, the negative electrode of the first rectifier diode links to each other with the other end of the first filter capacitor and consists of positive output end, and the anode of the second rectifier diode links to each other with the other end of the second filter capacitor and consists of negative output terminal;
The grid of described main switch and the grid of clamping switch tube all receive the control signal that external equipment provides.
Described main switch and clamping switch tube all adopt the NMOS pipe.
The new forms of energy battery is a kind of device that directly regenerative resource (such as nuclear energy, solar energy, wind energy, biomass energy, geothermal energy etc.) is changed into electric energy, and preferably, described new forms of energy battery is photovoltaic cell; With respect to other new forms of energy batteries, it is not subjected to environmental limitations, and is easy to use.
Energy accumulator is a kind of device for storage of electrical energy (such as storage battery, super capacitor etc.), and preferably, described energy accumulator is storage battery; It has higher energy storage density, and low price, has universality.
Operation principle of the present utility model is:
When the new forms of energy battery can be worked, the first main switch and the second main switch work, clamping switch tube is not worked, the electric energy powering load of new forms of energy battery output, energy in the leakage inductance in the first coupling inductance and the second coupling inductance charges a battery, and energy limit switch tube voltage stress; When the new forms of energy battery is not worked, storage battery is by sequential turn-on the 3rd main switch, the 4th main switch, the first clamping switch tube, the second clamping switch tube powering load, the 3rd main switch and the first clamping switch tube consist of soft switch circuit, and the 4th main switch and the second clamping switch tube consist of soft switch circuit.
The utility model adopts Interleaving and Transformer Paralleling, can well improve the power delivery ability of equipment, and its power delivery ability can extend to 10KW; Owing to be the structure of crisscross parallel, the phase place by the control main switch can realize the low ripple of input current, thereby is easy to realize the MPPT maximum power point tracking control of new forms of energy battery; Simultaneously, the utility model has adopted the active clamp structure can realize the soft switch of main switch, thereby has reduced loss, has improved efficient; In addition, the utility model has adopted two coupling inductance formulas of load-side cascaded structure, can realize higher boost capability; When new forms of energy are battery operated, both can power to load-side, can power by accumulators simultaneously; When the new forms of energy battery is not worked, still can power to load-side by storage battery.
Description of drawings
Fig. 1 is the structural representation based on the new energy system of many power inverters.
Fig. 2 is the structural representation based on the new energy system of three port power inverters.
Fig. 3 is that tradition is based on the electrical block diagram of the new energy system of three port power inverters.
Fig. 4 is the electrical block diagram of the utility model new energy system.
The circuit theory schematic diagram of power conversion operating state 1 when Fig. 5 is the utility model supplying power for photovoltaic cell.
The circuit theory schematic diagram of power conversion operating state 2 when Fig. 6 is the utility model supplying power for photovoltaic cell.
The circuit theory schematic diagram of power conversion operating state 3 when Fig. 7 is the utility model supplying power for photovoltaic cell.
The circuit theory schematic diagram of power conversion operating state 4 when Fig. 8 is the utility model supplying power for photovoltaic cell.
The circuit theory schematic diagram of power conversion operating state 5 when Fig. 9 is the utility model supplying power for photovoltaic cell.
The circuit theory schematic diagram of power conversion operating state 6 when Figure 10 is the utility model supplying power for photovoltaic cell.
The circuit theory schematic diagram of power conversion operating state 7 when Figure 11 is the utility model supplying power for photovoltaic cell.
The circuit theory schematic diagram of power conversion operating state 8 when Figure 12 is the utility model supplying power for photovoltaic cell.
The circuit theory schematic diagram of power conversion operating state 1 when Figure 13 is the utility model storage battery power supply.
The circuit theory schematic diagram of power conversion operating state 2 when Figure 14 is the utility model storage battery power supply.
The circuit theory schematic diagram of power conversion operating state 3 when Figure 15 is the utility model storage battery power supply.
The circuit theory schematic diagram of power conversion operating state 4 when Figure 16 is the utility model storage battery power supply.
The circuit theory schematic diagram of power conversion operating state 5 when Figure 17 is the utility model storage battery power supply.
The circuit theory schematic diagram of power conversion operating state 6 when Figure 18 is the utility model storage battery power supply.
The circuit theory schematic diagram of power conversion operating state 7 when Figure 19 is the utility model storage battery power supply.
The circuit theory schematic diagram of power conversion operating state 8 when Figure 20 is the utility model storage battery power supply.
Embodiment
In order more specifically to describe the utility model, below in conjunction with the drawings and the specific embodiments the technical solution of the utility model and operation principle thereof are elaborated.
As shown in Figure 4, a kind of isolated form comprises based on the new energy equipment of three port power inverters: a photovoltaic cell F, a storage battery E, a reverse blocking diode D, two coupling inductance L
1～L
2, four main switch S
1～S
4, two clamping switch tube Q
1～Q
2, two clamp capacitor C
1～C
2, two rectifier diode Z
1～Z
2With two filter capacitor Co
1～Co
2Wherein:
The positive pole of photovoltaic cell F links to each other with the anode of reverse blocking diode D, the negative electrode of reverse blocking diode D and the first main switch S
1Drain electrode and the second main switch S
2Drain electrode link to each other the first main switch S
1Source electrode and the 3rd main switch S
3Drain electrode, the first clamping switch tube Q
1Source electrode and the first coupling inductance L
1The non-same polarity of primary coil links to each other, the second main switch S
2Source electrode and the 4th main switch S
4Drain electrode, the second clamping switch tube Q
2Source electrode and the second coupling inductance L
2The non-same polarity of primary coil links to each other, the 3rd main switch S
3Source electrode and the 4th main switch S
4Source electrode and the negative pole of storage battery E link to each other the first clamping switch tube Q
1Drain electrode and the first clamp capacitor C
1An end link to each other the second clamping switch tube Q
2Drain electrode and the second clamp capacitor C
2An end link to each other the negative pole of photovoltaic cell F and the first clamp capacitor C
1The other end, the second clamp capacitor C
2The other end, the first coupling inductance L
1The Same Name of Ends of primary coil, the second coupling inductance L
2The Same Name of Ends of primary coil links to each other with the positive pole of storage battery E;
The first coupling inductance L
1The non-same polarity of secondary coil and the second coupling inductance L
2The non-same polarity of secondary coil links to each other, the second coupling inductance L
2The Same Name of Ends of secondary coil and the first rectifier diode Z
1Anode and the second rectifier diode Z
2Negative electrode link to each other the first coupling inductance L
1The Same Name of Ends of secondary coil and the first filter capacitor Co
1An end and the second filter capacitor Co
2An end link to each other the first rectifier diode Z
1Negative electrode and the first filter capacitor Co
1The other end link to each other and the end of connecting resistance load R the second rectifier diode Z
2Anode and the second filter capacitor Co
2The other end link to each other and the other end of connecting resistance load R;
Main switch S
1～S
4Grid and clamping switch tube Q
1～Q
2Grid all receive the control signal that external equipment provides; In the present embodiment, main switch S
1～S
4With clamping switch tube Q
1～Q
2All adopt the NMOS pipe.
Present embodiment is divided following two kinds of operating states:
(1) photovoltaic cell F normal operation (daytime is sunny), the output loop energy is provided by photovoltaic cell F, clamping switch tube Q
1～Q
2Be in normally off, do not participate in the course of work; Circuit working state comprises following process:
Operating state 1 (as shown in Figure 5), main switch S
1, S
2All open-minded, Q
1, Q
2Turn-off, coupling inductance former limit energy storage under the input voltage effect, former limit exciting current is linear to increase capacitor C o
1, Co
2Series connection is powered to load R.
Operating state 2 (as shown in Figure 6), S
1Turn-off coupling inductance L
1Exciting current is to S
1The parasitic capacitance charging, switching tube S
1Between voltage linear increase coupling inductance L
2Former limit exciting current continues linear increase, capacitor C o
1, Co
2Series connection is powered to load R.
Operating state 3 (as shown in Figure 7), S
1The parasitic capacitance both end voltage is elevated to rectifier diode Z behind the certain value
2Conducting, at this moment coupling inductance L
1Be operated in anti-swash state, L
2Be operated in the normal shock state, the energy in photovoltaic cell F and the coupling inductance begins to capacitor C o
2Transmit, simultaneously capacitor C o
1, Co
2Series connection is powered to load R.
Operating state 4 (as shown in Figure 8), S
1S when the parasitic capacitance both end voltage is raised to clamping voltage
3Anti-also diode current flow, L
2Continue the linear increase of energy storage electric current, coupling inductance L
1Middle energy is to capacitor C o
2Charging also is storage battery E charging simultaneously.
Operating state 5 (as shown in Figure 9), S
3Open-minded, this moment S
3Open-minded for zero voltage switch, flow through its anti-also diode current rapidly to S
3Shift.
Operating state 6 (as shown in figure 10), S
3Turn-off leakage inductance L
1With switching tube S
1Parasitic capacitance resonance, the part energy on the leakage inductance is transmitted to load R, and another part is to L
2Transmit.
Operating state 7 (as shown in figure 11), S
1The parasitic capacitance both end voltage reduces to 0, parasitic capacitance and leakage inductance L
1Resonant process finishes, at this moment S
1Anti-also diode current flow afterflow, the leakage inductance electric current is at capacitor C o
2Voltage effect lower linear descend.
Operating state 8 (as shown in figure 12), S
1Conducting, at this moment S
1Open-minded for zero voltage switch, rectifier diode continues the afterflow conducting until electric current is reduced to
0, diode Z
2Cut-off.This moment S
1, S
2All open-minded, former limit exciting current is linear to increase capacitor C o
1, Co
2Series connection is powered to load R.
Switching tube S
2Operating state in one-period and S
1In like manner.
(2) do not work (night or overcast and rainy unglazed photograph) as photovoltaic cell F, the output loop energy is provided by storage battery E, main switch S
1, S
2Be in normally off, do not participate in the course of work; Circuit working state comprises following process:
Operating state 1 (as shown in figure 13), S
3, S
4All open-minded, Q
1, Q
2Turn-off, coupling inductance former limit energy storage under the input voltage effect, former limit exciting current is linear to increase capacitor C o
1, Co
2Series connection is powered to load R.
Operating state 2 (as shown in figure 14), S
3Turn-off inductance L
1Exciting current is to S
3The parasitic capacitance charging, voltage linear increases between switching tube, L
2Former limit exciting current continues linear increase, capacitor C o
1, Co
2Series connection is powered to load R.
Operating state 3 (as shown in figure 15), S
3The parasitic capacitance both end voltage is elevated to rectifier diode Z behind the certain value
1Conducting, at this moment coupling inductance L
1Be operated in anti-swash state, L
2Be operated in the normal shock state, the energy in storage battery E and the coupling inductance begins to capacitor C o
1Transmit, simultaneously capacitor C o
1, Co
2Series connection is powered to load R.
Operating state 4 (as shown in figure 16), S
3Q when the parasitic capacitance both end voltage is raised to clamping voltage
1Anti-also diode current flow, L
2Continue the linear increase of energy storage electric current, coupling inductance L
1Middle energy is to output capacitance Co
1Charging.
Operating state 5 (as shown in figure 17), Q
1Open-minded, this moment Q
1Open-minded for zero voltage switch, flow through its anti-also diode current rapidly to Q
1Shift.
Operating state 6 (as shown in figure 18), Q
1Turn-off leakage inductance L
1With switching tube S
3Parasitic capacitance Cs
3Resonance, leakage inductance L
1On part energy transmit to load R, another part transmits to storage battery E.
Operating state 7 (as shown in figure 19), S
3The parasitic capacitance both end voltage reduces to 0, parasitic capacitance and leakage inductance L
1Resonant process finishes, at this moment S
3Anti-also diode current flow afterflow, the leakage inductance electric current is at capacitor C o
1Voltage effect lower linear descend.
Operating state 8 (as shown in figure 20), S
3Conducting, at this moment S
3Open-minded for zero voltage switch, rectifier diode continues the afterflow conducting until electric current is reduced to
0, diode Z
1Cut-off.This moment S
3, S
4All open-minded, former limit exciting current is linear to increase capacitor C o
1, Co
2Series connection is powered to load R.
Switching tube S
4Operating state in one-period and S
3In like manner.
Claims (4)
1. an isolated form is based on the new energy equipment of three port power inverters, it is characterized in that, comprising: a new forms of energy battery, an energy accumulator, a reverse blocking diode, two coupling inductances, four main switches, two clamping switch tubes, two clamp capacitors, two rectifier diodes and two filter capacitors; Wherein:
The positive pole of new forms of energy battery links to each other with the anode of reverse blocking diode, the negative electrode of reverse blocking diode links to each other with the drain electrode of the first main switch and the drain electrode of the second main switch, the drain electrode of the source electrode of the first main switch and the 3rd main switch, the source electrode of the first clamping switch tube links to each other with the non-same polarity of the first coupling inductance primary coil, the drain electrode of the source electrode of the second main switch and the 4th main switch, the source electrode of the second clamping switch tube links to each other with the non-same polarity of the second coupling inductance primary coil, the source electrode of the 3rd main switch links to each other with the source electrode of the 4th main switch and the negative pole of energy accumulator, the drain electrode of the first clamping switch tube links to each other with an end of the first clamp capacitor, the drain electrode of the second clamping switch tube links to each other with an end of the second clamp capacitor, the other end of the negative pole of new forms of energy battery and the first clamp capacitor, the other end of the second clamp capacitor, the Same Name of Ends of the first coupling inductance primary coil, the Same Name of Ends of the second coupling inductance primary coil links to each other with the positive pole of energy accumulator;
The non-same polarity of the first coupling inductance secondary coil links to each other with the non-same polarity of the second coupling inductance secondary coil, the Same Name of Ends of the second coupling inductance secondary coil links to each other with the anode of the first rectifier diode and the negative electrode of the second rectifier diode, the Same Name of Ends of the first coupling inductance secondary coil links to each other with an end of the first filter capacitor and an end of the second filter capacitor, the negative electrode of the first rectifier diode links to each other with the other end of the first filter capacitor and consists of positive output end, and the anode of the second rectifier diode links to each other with the other end of the second filter capacitor and consists of negative output terminal;
The grid of described main switch and the grid of clamping switch tube all receive the control signal that external equipment provides.
2. isolated form according to claim 1 is characterized in that based on the new energy equipment of three port power inverters: described main switch and clamping switch tube all adopt the NMOS pipe.
3. isolated form according to claim 1 is characterized in that based on the new energy equipment of three port power inverters: described new forms of energy battery is photovoltaic cell.
4. isolated form according to claim 1 is characterized in that based on the new energy equipment of three port power inverters: described energy accumulator is storage battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220347523XU CN202798466U (en) | 2012-07-18 | 2012-07-18 | Isolated-type new energy power supply unit based on three-port power converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220347523XU CN202798466U (en) | 2012-07-18 | 2012-07-18 | Isolated-type new energy power supply unit based on three-port power converter |
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| Publication Number | Publication Date |
|---|---|
| CN202798466U true CN202798466U (en) | 2013-03-13 |
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ID=47825637
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220347523XU Expired - Fee Related CN202798466U (en) | 2012-07-18 | 2012-07-18 | Isolated-type new energy power supply unit based on three-port power converter |
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| Country | Link |
|---|---|
| CN (1) | CN202798466U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751876A (en) * | 2012-07-18 | 2012-10-24 | 浙江大学 | Isolation type new energy power supply equipment based on three-port power converter |
| CN109688669A (en) * | 2019-03-11 | 2019-04-26 | 福州大学 | A kind of High Power Factor no electrolytic capacitor LED drive power and its control method |
| CN114257085A (en) * | 2021-11-30 | 2022-03-29 | 阳光电源股份有限公司 | Power conversion circuit, control method thereof and power supply system |
-
2012
- 2012-07-18 CN CN201220347523XU patent/CN202798466U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751876A (en) * | 2012-07-18 | 2012-10-24 | 浙江大学 | Isolation type new energy power supply equipment based on three-port power converter |
| CN109688669A (en) * | 2019-03-11 | 2019-04-26 | 福州大学 | A kind of High Power Factor no electrolytic capacitor LED drive power and its control method |
| CN114257085A (en) * | 2021-11-30 | 2022-03-29 | 阳光电源股份有限公司 | Power conversion circuit, control method thereof and power supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20130718 |