CN205123426U - Wireless charging device of energy two -way flow - Google Patents
Wireless charging device of energy two -way flow Download PDFInfo
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- CN205123426U CN205123426U CN201520829686.5U CN201520829686U CN205123426U CN 205123426 U CN205123426 U CN 205123426U CN 201520829686 U CN201520829686 U CN 201520829686U CN 205123426 U CN205123426 U CN 205123426U
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Abstract
The utility model discloses a wireless charging device of energy two -way flow, including sending end module, receiving end module, pine coupling transformer and battery charging outfit, wherein, pine coupling transformer includes sending end coil and receiving end coil, and the sending end module includes: sending end power conversion unit, sending end forceful electric power power supply unit, sending end light current power supply unit, sending end controller, sending end signal conditioning and protected location and sending end sensor unit, the receiving end module includes: the unit is taked care of to receiving end power conversion unit, receiving end light current power supply unit, receiving end controller, receiving end signal conditioning and protected location, receiving end sensor unit and the electric energy that links to each other with the battery charging outfit. The utility model discloses in related wireless power transmission technology, utilized the electromagnetic induction type wireless power transmission technology, power transmission module with receive electric module not have any connection of electric lines each other to power transmission module with receive electric module to have symmetrical topological structure, bidirectional provides the passageway for the electric energy.
Description
Technical field
The utility model relates to a kind of wireless charging device of energy in bidirectional flow, belongs to wireless charging technical field.
Background technology
Wireless power transmission technology is a kind of novel powering mode, realizes power consumption equipment and wirelessly obtains electric energy from stationary power source system.This powering mode fail safe is good, reliability is high, maintenance cost is low, eliminate the Electrical Safety of equipment under the unreliability of Multi-contact, abnormal environment, the problem such as skimming wear, contact sparking, carbon deposit and dangerous bare exposed conductor that the limitation of electric equipment movement, slip way to take power exist, be specially adapted to dust, humidity, under water, adverse circumstances such as inflammable, explosive and require the mobile power consumption equipment of electric energy flexible access.The maturation of this technology and extensive use bring revolutionary variation will to the transmission of electric power system electric energy and power distribution mode.Existing wireless electric energy transmission device, mostly uses independently radio receiving transmitting module to carry out the information communication between powered part and power transmission part.This mode not only increases the volume of powered part, and is easily subject to the electromagnetic interference of the loosely coupled transformer of transmitting energy and sends wrong information, causes whole system job insecurity even can not work.The unidirectional transmission property of existing radio energy transmitting device, lack energy feedback passage, energy cannot be transmitted back to electrical network, does not reach and more effectively improves energy use efficiency.For this reason, need to design a kind of wireless two-way electric energy transmitting device, to make charging device discharge and recharge freely.
Utility model content
Technology of the present utility model is dealt with problems and is: for overcoming the deficiencies in the prior art, provides a kind of wireless charging device of energy in bidirectional flow, for electric energy transmitted in both directions provides passage, reduces the danger that charging device overcharges, improves efficiency for charge-discharge.
Technical solution of the present utility model is:
A wireless charging device for energy in bidirectional flow, comprises sending end module, receiving end module, loosely coupled transformer and charging device, and wherein, loosely coupled transformer comprises sending end coil and receiving end coil,
Sending end module comprises: sending end power conversion unit, sending end forceful electric power power supply unit, sending end light current power supply unit, sending end controller, sending end signal condition and protected location and sending end sensor unit,
Wherein AC rectification is direct current by sending end forceful electric power power supply unit, and direct current is inputed to respectively sending end power conversion unit and sending end light current power supply unit, the direct current carried by sending end forceful electric power power supply unit received is carried out power conversion by sending end light current power supply unit, direct current after power conversion is sending end controller, sending end signal condition and protected location and sending end sensor unit are powered, the DC power conversion carried by sending end forceful electric power power supply unit received is high-frequency alternating current by sending end power conversion unit, by the voltage of high-frequency alternating current, current signal passes to sending end sensor unit, sending end signal condition and protected location receive the voltage that sending end sensor unit transmits, current signal, and the voltage that will receive, current signal is converted to sending end conditioned signal or sending end guard signal, sending end controller receives sending end conditioned signal or the sending end guard signal of sending end signal condition and protected location transmission, and the sending end conditioned signal received or sending end guard signal are converted to pwm signal, pwm signal is passed to sending end power conversion unit, sending end power conversion unit is according to pwm signal, high-frequency alternating current is treated to the voltage required for sending end coil, the size of electric current and phase place,
Receiving end module comprises: receiving end power conversion unit, receiving end light current power supply unit, receiving end controller, receiving end signal condition and protected location, receiving end sensor unit and the electric energy conditioning unit be connected with charging device,
Wherein direct current is passed to electric energy conditioning unit by charging device, the direct current nursed one's health through electric energy conditioning unit passes to receiving end power conversion unit and receiving end light current power supply unit respectively, the direct current carried by electric energy conditioning unit received is carried out power conversion by receiving end light current power supply unit, direct current after power conversion is receiving end controller, receiving end signal condition and protected location and receiving end sensor unit are powered, the DC power conversion carried by electric energy conditioning unit received is high-frequency alternating current by receiving end power conversion unit, by the voltage of high-frequency alternating current, current signal passes to receiving end sensor unit, receiving end signal condition and protected location receive the voltage that receiving end sensor unit transmits, current signal, and the voltage that will receive, current signal is converted to receiving end conditioned signal or receiving end guard signal, receiving end controller receives receiving end conditioned signal or the receiving end guard signal of receiving end signal condition and protected location transmission, and the receiving end conditioned signal received or receiving end guard signal are converted to pwm signal, pwm signal is passed to receiving end power conversion unit, receiving end power conversion unit is according to pwm signal, high-frequency alternating current is treated to the voltage required for receiving end coil, the size of electric current and phase place.
Sending end power conversion unit comprises resonant transformation unit, inductance L, electric capacity C and power tube Q, wherein one end of electric capacity C is connected with the collector electrode of power tube Q, the other end of electric capacity C is connected with the emitter of power tube Q, one end of inductance L is as input, the other end of inductance L is connected with the collector electrode of power tube Q, the input of resonant transformation unit is connected with the two ends of electric capacity C, and the output of resonant transformation unit is connected with the sending end coil of loosely coupled transformer.
When sending end guard signal comprises electrical characteristic exception and charged state, the opering characteristic of electric apparatus abnormal signal that sending end sensor unit receives and the charging that receiving end module is transmitted completely signal, and control the shutoff of power tube Q.
When receiving end guard signal comprises electrical characteristic exception and discharge condition, the opering characteristic of electric apparatus abnormal signal that sending end sensor unit receives and the discharge stop signal that receiving end module is transmitted, and control the shutoff of power tube Q.
The utility model beneficial effect is compared with prior art:
(1) involved in the utility model wireless power transmission technology, make use of induction wireless power transmission technology, power transmission module is connected without any electric wire each other with powered module, and power transmission module and powered module have asymmetric topology structure, for electric energy transmitted in both directions provides passage.
(2) the utility model is by information, the same carrier transmission of energy, not only can reduce system and device volume, make simple and compact for structure, can also avoid the interference between wireless messages transmitting-receiving with wireless energy transfer, make system works more stable.
(3) automatically can realize power-off after the utility model is full of electricity, achieve the unattended operation in charging process, can realize at a high speed, run for a long time and continuously, easy to maintenance.
(4) the utility model can by idle electric energy feedback to electrical network, for electrical network provides effective electric energy to support, to improve effective utilization of the energy.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the utility model sending end power conversion unit structural representation;
Fig. 3 is the utility model power flow schematic diagram;
Fig. 4 is the utility model sending end signal condition schematic diagram;
Fig. 5 is the utility model sending end signal protection schematic diagram;
Fig. 6 is the utility model frequency tracking algorithm schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
As shown in Figure 3, the present embodiment comprises: the sending end module connected successively, the sending end coil of loosely coupled transformer and receiving end coil, receiving end module and charging device 14, wherein: sending end and receiving end coil are connected sending end module and receiving end module respectively, receiving end module is connected with charging device 14, during charge or discharge, electric energy, according to device operating state, can realize two-way flow.
The litz coil that described loosely coupled transformer is specifically 50mm by two 15 circles, diameter forms.
Particularly, when electricity owed by charging device 14, system enters transmission mode, definable grid side is sending end, and charging device 14 side is receiving end, now, sending end electric energy passes through loosely coupled transformer Mutual Inductance Coupling to receiving end, it is stable, reliable direct current that receiving end passes through pwm signal rectification exchange conversion, powers, maintain its stable operation to charging device 14;
When charging device 14 is full of electricity or needs electric discharge to electrical network, receiving end electric energy passes through loosely coupled transformer Mutual Inductance Coupling to sending end, it is stable, reliable direct current that sending end passes through pwm signal rectification exchange conversion, by power delivery to electrical network, effectively can reduce the risk that charging device overcharges on the one hand, also conveniently electric energy initiatively can be defeated by electrical network, for electrical network provides effective electric energy to support, to improve effective utilization of the energy on the other hand.
As shown in Figure 1, described sending end module comprises: sending end power conversion unit 1, sending end forceful electric power power supply unit 6, sending end light current power supply unit 5, sending end controller 2, sending end signal condition and protected location 3 and sending end sensor unit 4,
Wherein alternating current iA rectification is direct current by sending end forceful electric power power supply unit 6, and direct current is inputed to respectively sending end power conversion unit 1 and sending end light current power supply unit 5, the direct current carried by sending end forceful electric power power supply unit 6 received is carried out power conversion by sending end light current power supply unit 5, direct current after power conversion is sending end controller 2, sending end signal condition and protected location 3 and sending end sensor unit 4 are powered, and the DC power conversion carried by sending end forceful electric power power supply unit 6 received is high-frequency alternating current i by sending end power conversion unit 1
ac, by the voltage of high-frequency alternating current, current signal passes to sending end sensor unit 4, sending end signal condition and protected location 3 receive the voltage that sending end sensor unit 4 transmits, current signal, and the voltage that will receive, current signal is converted to sending end conditioned signal or sending end guard signal, sending end controller 2 receives sending end conditioned signal or the sending end guard signal of sending end signal condition and protected location 3 transmission, and the sending end conditioned signal received or sending end guard signal are converted to pwm signal, pwm signal is passed to sending end power conversion unit 1, sending end power conversion unit 1 is according to pwm signal, high-frequency alternating current is treated to the voltage required for sending end coil 7, the size of electric current and phase place,
During charging, the sending end coil 7 of loosely coupled transformer is converted into electromagnetic wave high-frequency alternating current, the receiving end coil 15 of loosely coupled transformer is converted into high-frequency alternating current electromagnetic wave, the high-frequency ac electric rectification received is direct current by receiving end power conversion unit 8, and the Direct current treatment of reception is that charging device 14 charges required voltage, electric current by electric energy conditioning unit 13.
When described sending end guard signal comprises electrical characteristic exception and charged state, the opering characteristic of electric apparatus abnormal signal that sending end sensor unit 4 receives and the charging that receiving end module is transmitted completely signal, and control the shutoff of power tube Q.
Receiving end module comprises: receiving end power conversion unit 8, receiving end light current power supply unit 12, receiving end controller 9, receiving end signal condition and protected location 10, receiving end sensor unit 11 and the electric energy conditioning unit 13 be connected with charging device 14,
Wherein direct current is passed to electric energy conditioning unit 13 by charging device 14, the direct current nursed one's health through electric energy conditioning unit 13 passes to receiving end power conversion unit 8 and receiving end light current power supply unit 12 respectively, the direct current carried by electric energy conditioning unit 13 received is carried out power conversion by receiving end light current power supply unit 12, direct current after power conversion is receiving end controller 9, receiving end signal condition and protected location 10 and receiving end sensor unit 11 are powered, the DC power conversion carried by electric energy conditioning unit 13 received is high-frequency alternating current by receiving end power conversion unit 8, by the voltage of high-frequency alternating current, current signal passes to receiving end sensor unit 11, receiving end signal condition and protected location 10 receive the voltage that receiving end sensor unit 11 transmits, current signal, and the voltage that will receive, current signal is converted to receiving end conditioned signal or receiving end guard signal, receiving end controller 9 receives receiving end conditioned signal or the receiving end guard signal of receiving end signal condition and protected location 10 transmission, and the receiving end conditioned signal received or receiving end guard signal are converted to pwm signal, pwm signal is passed to receiving end power conversion unit 8, receiving end power conversion unit 8 is according to pwm signal, high-frequency alternating current is treated to the voltage required for receiving end coil 15, the size of electric current and phase place.
During electric discharge, the receiving end coil 15 of loosely coupled transformer is converted into electromagnetic wave high-frequency alternating current, the sending end coil 7 of loosely coupled transformer is converted into high-frequency alternating current electromagnetic wave, the high-frequency ac electric rectification received is direct current by sending end power conversion unit 1, and forceful electric power power supply unit 6 is by the voltage of the Direct current treatment of reception needed for electrical network, electric current.
When described receiving end guard signal comprises electrical characteristic exception and discharge condition, the opering characteristic of electric apparatus abnormal signal that sending end sensor unit 11 receives and the discharge stop signal that receiving end module is transmitted, and control the shutoff of power tube Q.
In order to reduce system bulk, described sending end power conversion unit 1 comprises resonant transformation unit, inductance L, electric capacity C and power tube Q, as shown in Figure 2, wherein one end of electric capacity C is connected with the collector electrode of power tube Q, the other end of electric capacity C is connected with the emitter of power tube Q, one end of inductance L is as input, the other end of inductance L is connected with the collector electrode of power tube Q, the input of resonant transformation unit is connected with the two ends of electric capacity C, and the output of resonant transformation unit is connected with the sending end coil of loosely coupled transformer.This power conversion unit power tube switching loss is little, and conversion efficiency affects less by coil distance.
When electrical characteristic is abnormal, as shown in Figure 5, sending end sensor unit 4 receives the current i of opering characteristic of electric apparatus abnormal signal
ac, to current i
accarry out nursing one's health the rear current i after nursing one's health that obtains
dc, when the current i through conditioning
dcduring overcurrent, produce the current i int of sending end resonance current overcurrent protection signal, R in Fig. 5
6resistance be rheostat, in circuit according to the threshold value adjusting resistance value of overcurrent protection.When signal is lower than this threshold value, signal exports after operation amplifier, and when signal exceedes threshold value, output level overturns.
When normal charging condition, sending end sensor unit 4 receives normal current i
acsignal, to current i
accarry out nursing one's health the rear current i after nursing one's health that obtains
dc, the current i after conditioning
dcinput to sending end controller 2; Sending end controller 2 is according to the current i after described conditioning
dcexport the control signal being used for Modulating Power pipe Q, sending end controller 2 determines whether to protect sending end power conversion unit 1 according to described guard signal.
Particularly, as shown in Figure 4, sending end sensor unit 4 comprises two operational amplifier Q1 and Q2, two diode D1 and D2 and multiple resistance, and wherein the model of two diodes is SMBYT01-400, and the model of two operational amplifiers all elects TL084 as.By to current i
acsampling, is promoted by second-order low-pass filter making alive, the AC signal of positive and negative change is promoted to the signal i within the scope of unipolar 0 ~ 3.3V
dc, access sending end controller 2.Sending end controller 2 one aspect can according to described signal i
dcadjust the frequency of described pwm signal; On the other hand can according to signal i
dcvalue export charging device 14 battery to battery status display mode and be full of information.
Described sending end controller 2 comprises control chip and power tube driver element; control chip adopts frequency tracking algorithm that sending end conditioned signal or sending end guard signal are converted to pwm signal; pwm signal passes to the power tube driver element be connected with the base stage of the power tube Q in sending end power conversion unit 1, and pwm signal passes to sending end power conversion unit 1 the most at last.
User is in the process of carrying out wireless charging, and because coil putting position can not immobilize, and the distance of change can affect efficiency of transmission.Wireless power transmission technical research result shows, when operating frequency is equal with resonance frequency, system transfers is most effective.And power transmission coil current reflects the deviation of operating frequency and resonance frequency in real time, therefore, preferably, adopt the frequency tracking algorithm described in Fig. 6 to adjust operating frequency in real time, make system transfers most effective; And this algorithm is not when increasing system hardware, reach the control to system.Concrete grammar is: the i judging current period
dcbe greater than the value in last cycle; The i of current period
dcwhen being greater than the value in last cycle, judging whether ongoing frequency is greater than the frequency in previous cycle, if be greater than the frequency in previous cycle, then improve operating frequency, if be less than the frequency in previous cycle, then reduce operating frequency; The i of current period
dcwhen being less than the value in last cycle, judging whether ongoing frequency is greater than the frequency in previous cycle, if be greater than the frequency in previous cycle, then reduce operating frequency, if be less than the frequency in previous cycle, then improve operating frequency; Thus acquisition makes system reach the pwm signal of maximal efficiency transmission state.
The unexposed content of the utility model is known to the skilled person general knowledge.
Claims (4)
1. the wireless charging device of an energy in bidirectional flow, it is characterized in that, comprise sending end module, receiving end module, loosely coupled transformer and charging device (14), wherein, loosely coupled transformer comprises sending end coil (7) and receiving end coil (15)
Sending end module comprises: sending end power conversion unit (1), sending end forceful electric power power supply unit (6), sending end light current power supply unit (5), sending end controller (2), sending end signal condition and protected location (3) and sending end sensor unit (4)
Wherein AC rectification is direct current by sending end forceful electric power power supply unit (6), and direct current is inputed to respectively sending end power conversion unit (1) and sending end light current power supply unit (5), the direct current carried by sending end forceful electric power power supply unit (6) received is carried out power conversion by sending end light current power supply unit (5), direct current after power conversion is sending end controller (2), sending end signal condition and protected location (3) and sending end sensor unit (4) power supply, the DC power conversion carried by sending end forceful electric power power supply unit (6) received is high-frequency alternating current by sending end power conversion unit (1), by the voltage of high-frequency alternating current, current signal passes to sending end sensor unit (4), sending end signal condition and protected location (3) receive the voltage that sending end sensor unit (4) transmits, current signal, and the voltage that will receive, current signal is converted to sending end conditioned signal or sending end guard signal, the sending end conditioned signal that sending end controller (2) reception sending end signal condition and protected location (3) transmit or sending end guard signal, and the sending end conditioned signal received or sending end guard signal are converted to pwm signal, pwm signal is passed to sending end power conversion unit (1), sending end power conversion unit (1) is according to pwm signal, high-frequency alternating current is treated to the voltage required for sending end coil (7), the size of electric current and phase place,
Receiving end module comprises: receiving end power conversion unit (8), receiving end light current power supply unit (12), receiving end controller (9), receiving end signal condition and protected location (10), receiving end sensor unit (11) and the electric energy conditioning unit (13) be connected with charging device (14)
Wherein direct current is passed to electric energy conditioning unit (13) by charging device (14), the direct current nursed one's health through electric energy conditioning unit (13) passes to receiving end power conversion unit (8) and receiving end light current power supply unit (12) respectively, the direct current carried by electric energy conditioning unit (13) received is carried out power conversion by receiving end light current power supply unit (12), direct current after power conversion is receiving end controller (9), receiving end signal condition and protected location (10) and receiving end sensor unit (11) power supply, the DC power conversion carried by electric energy conditioning unit (13) received is high-frequency alternating current by receiving end power conversion unit (8), by the voltage of high-frequency alternating current, current signal passes to receiving end sensor unit (11), receiving end signal condition and protected location (10) receive the voltage that receiving end sensor unit (11) transmits, current signal, and the voltage that will receive, current signal is converted to receiving end conditioned signal or receiving end guard signal, the receiving end conditioned signal that receiving end controller (9) reception receiving end signal condition and protected location (10) transmit or receiving end guard signal, and the receiving end conditioned signal received or receiving end guard signal are converted to pwm signal, pwm signal is passed to receiving end power conversion unit (8), receiving end power conversion unit (8) is according to pwm signal, high-frequency alternating current is treated to the voltage required for receiving end coil (15), the size of electric current and phase place.
2. the wireless charging device of a kind of energy in bidirectional flow as claimed in claim 1, it is characterized in that, sending end power conversion unit (1) comprises resonant transformation unit, inductance L, electric capacity C and power tube Q, wherein one end of electric capacity C is connected with the collector electrode of power tube Q, the other end of electric capacity C is connected with the emitter of power tube Q, one end of inductance L is as input, the other end of inductance L is connected with the collector electrode of power tube Q, the input of resonant transformation unit is connected with the two ends of electric capacity C, the output of resonant transformation unit is connected with the sending end coil of loosely coupled transformer.
3. the wireless charging device of a kind of energy in bidirectional flow as claimed in claim 1; it is characterized in that; when sending end guard signal comprises electrical characteristic exception and charged state; the opering characteristic of electric apparatus abnormal signal that sending end sensor unit (4) receives and the charging that receiving end module is transmitted completely signal, and control the shutoff of power tube Q.
4. the wireless charging device of a kind of energy in bidirectional flow as claimed in claim 1; it is characterized in that; when receiving end guard signal comprises electrical characteristic exception and discharge condition; the opering characteristic of electric apparatus abnormal signal that sending end sensor unit (4) receives and the discharge stop signal that receiving end module is transmitted, and control the shutoff of power tube Q.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520829686.5U CN205123426U (en) | 2015-10-23 | 2015-10-23 | Wireless charging device of energy two -way flow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520829686.5U CN205123426U (en) | 2015-10-23 | 2015-10-23 | Wireless charging device of energy two -way flow |
| CN201510697777.2A CN105262242A (en) | 2015-10-23 | 2015-10-23 | Wireless charging device based on two-way energy flow |
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| CN205123426U true CN205123426U (en) | 2016-03-30 |
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| CN201510697777.2A Pending CN105262242A (en) | 2015-10-23 | 2015-10-23 | Wireless charging device based on two-way energy flow |
| CN201520829686.5U Active CN205123426U (en) | 2015-10-23 | 2015-10-23 | Wireless charging device of energy two -way flow |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262242A (en) * | 2015-10-23 | 2016-01-20 | 北京航天控制仪器研究所 | Wireless charging device based on two-way energy flow |
| CN107659000A (en) * | 2017-10-30 | 2018-02-02 | 华南理工大学 | It is a kind of can double-direction radio charging transmission circuit |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105932789B (en) | 2016-05-10 | 2021-04-27 | 京东方科技集团股份有限公司 | Transformer and power panel |
| CN108199496B (en) * | 2018-01-22 | 2023-08-25 | 中国科学院空间应用工程与技术中心 | Wireless transmission space connector and implementation method thereof |
| CN112406569B (en) * | 2020-11-05 | 2022-09-16 | 宁波赛耐比光电科技有限公司 | Control device and control method of wireless charging pile |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163868B (en) * | 2011-05-16 | 2013-11-06 | 上海交通大学 | Energy bidirectional flowing non-contact charging device for electrical automobiles |
| CN202817865U (en) * | 2012-09-20 | 2013-03-20 | 广州市井源机电设备有限公司 | Intelligent non-contact charging system |
| CN103595144B (en) * | 2013-10-23 | 2015-09-23 | 北京航天控制仪器研究所 | A kind of implantable left ventricular assist system of wireless power transmission |
| CN105262242A (en) * | 2015-10-23 | 2016-01-20 | 北京航天控制仪器研究所 | Wireless charging device based on two-way energy flow |
-
2015
- 2015-10-23 CN CN201510697777.2A patent/CN105262242A/en active Pending
- 2015-10-23 CN CN201520829686.5U patent/CN205123426U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262242A (en) * | 2015-10-23 | 2016-01-20 | 北京航天控制仪器研究所 | Wireless charging device based on two-way energy flow |
| CN107659000A (en) * | 2017-10-30 | 2018-02-02 | 华南理工大学 | It is a kind of can double-direction radio charging transmission circuit |
| CN107659000B (en) * | 2017-10-30 | 2018-08-21 | 华南理工大学 | It is a kind of can double-direction radio charging transmission circuit |
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| CN105262242A (en) | 2016-01-20 |
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Effective date of registration: 20220412 Address after: Room 411, 4th floor, building 3, yard 7, Shixing street, Shijingshan District, Beijing 100043 Patentee after: Beijing Aerospace Wanrun High Tech Co.,Ltd. Address before: 142 box 403, box 100854, Beijing, Beijing, Haidian District Patentee before: BEIJIGN INSTITUTE OF AEROSPACE CONTROL DEVICES |
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