CN211321251U - Split type six-phase motor control system integrated with alternating current charging - Google Patents
Split type six-phase motor control system integrated with alternating current charging Download PDFInfo
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- CN211321251U CN211321251U CN201921259184.8U CN201921259184U CN211321251U CN 211321251 U CN211321251 U CN 211321251U CN 201921259184 U CN201921259184 U CN 201921259184U CN 211321251 U CN211321251 U CN 211321251U
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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
- Y02T10/64—Electric machine technologies in electromobility
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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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- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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Abstract
The utility model discloses an integrated alternating current charging's six looks motor control system of split type, including host system, drive module, direct current module, the pre-charge module, contravariant unit module, six looks motors of split type and connect in the PFC inductance module of alternating current socket, host system passes through drive module and connects in the signal input part of pre-charge module, this pre-charge module is configured to be connected in direct current module, in order to export corresponding pre-charge signal in the pre-charge module and drive the pre-charge module and receive the input of direct current through host system, the signal output part of pre-charge module connects in contravariant unit module, and the alternating current charging port that is equipped with through contravariant unit module and six looks motor port drive alternating current input voltage signal control six looks motor of split type; according to the scheme, the rapid charging method for alternating current charging is adopted, and the rapid electric quantity input of the six-phase motor is realized through the on-off current control of the inverter unit, so that the purpose of rapid charging of the electric automobile is achieved.
Description
Technical Field
The utility model belongs to the electric automobile field, more specifically says, the utility model relates to an integrated alternating current charging's six looks motor control system of split formula.
Background
Along with the development of modern science and technology, people pay attention to increasingly serious environmental problems, so that how to better protect the environment is important when science and technology is developed, a green and environment-friendly new energy automobile becomes a main trend of the development of the future automobile industry, at present, China has comprehensively promoted the strategic development of the new energy automobile, an electric motor replaces a traditional fuel engine to become a core device of an automobile driving system, discrete devices are adopted to be connected in parallel to control a motor, and how to solve the problems of stability, slow charging and the like of the devices in the practical application process is faced at present.
The mainstream charging scheme in the prior art is direct-current quick charging and single-phase alternating-current charging, the direct-current quick charging has higher input cost and larger volume, and the current quick development of a new energy automobile is not utilized; the single-phase alternating current charging time is long, and in addition, two controllers and two motors are required to be designed for some special vehicles such as environmental sanitation upper-mounted vehicles or dual-motor driven vehicles, so that the overall system of the vehicle becomes complicated, the reliability of the system is reduced, the cost is increased, in addition, a large number of discrete devices are adopted for parallel connection, once a fault occurs, the problem is difficult to troubleshoot, and the key problem to be solved at present is how to realize the current equalization of the discrete devices, improve the reliability of the discrete devices and shorten the charging time.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a split type six-phase motor control system of integrated interchange charging is provided.
In order to realize the purpose, the utility model discloses the technical scheme who takes does:
the utility model provides an integrated alternating current charging's six looks motor control system of split, its characterized in that: the intelligent power supply comprises a main control module, a driving module, a direct current module, a pre-charging module, an inversion unit module, a split six-phase motor and a PFC inductance module connected to an alternating current socket, wherein the main control module is connected to a signal input end of the pre-charging module through the driving module, the pre-charging module is configured to be connected to the direct current module so as to output a corresponding pre-charging signal to the pre-charging module through the main control module and drive the pre-charging module to receive direct current input, a signal output end of the pre-charging module is connected to the inversion unit module, an alternating current input voltage signal is driven to control the six-phase motor through an alternating current charging port and a split six-phase motor port which are arranged on the inversion unit module, and the inversion unit;
the pre-charge module includes: the second contactor is connected between the positive pole of a high-voltage battery arranged in the system and the second direct-current end of the current conversion module; the third contactor is connected between the positive pole of the high-voltage battery and a first direct current end of a current conversion module arranged in the system; the first contactor is connected with the second contactor in parallel after being connected with the first pre-charging resistor in series;
the control ends of the first contactor, the second contactor and the third contactor are respectively connected with a main control unit module arranged in the system;
the pre-charging module is integrated with the high-voltage battery.
The utility model discloses an integrated alternating current charging's six looks motor control system of split type, contravariant unit module is including corresponding six looks motor input and six parallelly connected sub-contravariant unit modules each other, and every sub-contravariant unit module all is equipped with the quantity the same and connects in a plurality of parallelly connected contravariant units of single phase motor, all establish ties in the PFC inductance module between contravariant unit module and the six looks motor with the corresponding FPC inductance of contravariant unit quantity, including two alternating current socket and the FPC inductance module that correspond six looks motors in this system, FPC inductance module passes through AC switch and connects in alternating current socket, is equipped with rotor sensor in the motor, converts the position signal in permanent magnet rotor magnetic field to the signal of telecommunication, provides correct commutation information for logic switch circuit.
The utility model discloses an integrated alternating current charging's six looks motor control systems of split type, still include AD conversion module and current detection module in the system, host system configures through AD conversion module and connects in current detection module, and current detection module's input is connected in the output of contravariant unit module, and current detection module is provided with two outputs and connects respectively in six looks motors with the PFC module to signal control contravariant unit module input voltage through host system output is in six looks motors.
The utility model discloses an integrated alternating current charging's six looks motor control system of split formula, be equipped with the insurance module between pre-charge module and the contravariant unit module, the pre-charge module configures to through the insurance module and connects in the contravariant unit module.
The utility model discloses an integrated alternating current charging's six looks motor control systems of split formula, the contravariant unit adopts insulated gate bipolar transistor, constitutes sub-contravariant unit module through a plurality of parallelly connected insulated gate bipolar transistor.
Adopt this technical scheme, correspond control independent winding all the way through designing solitary contravariant unit, and then make a plurality of contravariant units simultaneous working, with control split type six-phase motor simultaneous working, can avoid discrete device the problem of not flow equalizing and unreliable that faces in parallel application, simultaneously through multiplexing discrete contravariant unit device integration alternating current charging, in order to realize carrying out the high-power charging of twin gun to new energy automobile simultaneously, the electric quantity input that increases to charge, electric automobile's charging speed has been improved, and be very suitable for the use of present most electric automobile, charging time has not only been shortened, and it is convenient with electric automobile's charging process, be fit for most users ' consumption demand, the time saving cost, increase of efficiency.
The present invention will be described in more detail with reference to the accompanying drawings and examples.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic diagram of the circuit logic of the present invention;
FIG. 2 is a logic block diagram of the circuit of the present invention;
fig. 3 is a circuit connection diagram of the present invention.
Labeled in fig. 1 and 2: 101. a main control module; 102. a drive module; 103. a high voltage battery; 104. A pre-charging module; 105. an inversion unit module; 106. a first AC outlet; 107. a split six-phase motor; 108. a current detection module; 109. an AD conversion module; 110. an insurance module; 111. a bidirectional DCDC module; 113. a second AC outlet; 114. a first PFC inductance module; 115. a second PFC inductance module.
FIG. 3: 201. a main control module; 202. a driving circuit module; 203. a high voltage battery; 204. a pre-charging module; 205. an inversion unit module; 206. a first AC outlet; 207. a second AC outlet; 208. A current detection module; 209. an AD conversion module; 210. an insurance module; 211. a bidirectional DCDC module; 212. a rotor sensor.
Detailed Description
The following description of the embodiments of the present invention, with reference to the accompanying drawings, will be made in further detail to explain, for example, the shapes and structures of the components, the mutual positions and connection relationships among the components, the functions and working principles of the components, the manufacturing process, and the operation and use method of the components, so as to help those skilled in the art to understand the concept and technical solutions of the present invention more completely, accurately and deeply.
Fig. 1 is the circuit logic diagram of the utility model, fig. 2 is the utility model discloses a circuit logic block diagram, fig. 3 is the utility model discloses a circuit connection picture, the six looks motor control system of split type that integrated interchange charges as shown in the figure, including host system 101, drive module 102, the direct current module, pre-charge module 104, contravariant unit module 105, six looks motor 107 of split type and connect in the PFC inductance module (114, 115) of alternating current socket (106, 113), wherein, host system 101 passes through drive module 102 and connects in the signal input part of pre-charge module 104, this pre-charge module 104 is configured to connect in the direct current module, receive direct current's input in pre-charge module 104 and drive pre-charge module through the corresponding pre-charge signal of host system 101 output, the signal output part of pre-charge module 104 is connected in contravariant unit module, and the alternating current that is equipped with through contravariant unit module 105 charges port and six looks motor port drive alternating current of split type The input voltage signal controls the six-phase motor, and the inversion unit module is electrically connected with an alternating current socket through the PFC inductance module; the inversion unit module comprises six sub-inversion unit modules which correspond to six-phase motor input ends and are connected in parallel, each sub-inversion unit module is provided with a plurality of parallel inversion units which are the same in quantity and connected to a single-phase motor, FPC (flexible printed circuit) inductors (114 and 115) corresponding to the number of the inversion units are connected in series in PFC inductance modules (114 and 115) between the inversion unit modules and the six-phase motor, the system comprises two alternating current sockets (106 and 113) and FPC inductance modules (114 and 115) corresponding to the six-phase motor, the FPC inductance modules are connected to the alternating current sockets through alternating current switches, a rotor sensor 212 is arranged in the motor, position signals of a permanent magnet rotor magnetic field are converted into electric signals, and correct commutation information is provided for a logic switch circuit.
The system of the scheme further comprises an AD conversion module and a current detection module, the main control module is configured to be connected to the current detection module through the AD conversion module, the input end of the current detection module is connected to the output end of the inversion unit module, the current detection module is provided with two output ends and is respectively connected to the six-phase motor and the PFC module, and therefore the signal output by the main control module controls the inversion unit module to input voltage to the six-phase motor.
The pre-charge module in the above includes: the second contactor is connected between the positive pole of the high-voltage battery and the second direct-current end of the current conversion module; the third contactor is connected between the positive electrode of the high-voltage battery and the first direct current end of the current conversion module; the first contactor is connected with the second contactor in parallel after being connected with the first pre-charging resistor in series;
the control ends of the first contactor, the second contactor and the third contactor are respectively connected with the main control unit module;
and the pre-charging module is integrated with the high-voltage battery; and a safety module is arranged between the pre-charging module and the inversion unit module, and the pre-charging module is configured to be connected to the inversion unit module through the safety module.
The inversion unit adopts an insulated gate bipolar transistor, a plurality of insulated gate bipolar transistors connected in parallel form a sub-inversion unit module, and the insulated gate bipolar transistors integrate the advantages of a power transistor and a power field effect transistor, have good characteristics and are wide in application field; IGBTs are also three-terminal devices: a gate, a collector and an emitter. An igbt (insulated gate Bipolar transistor) is a Bipolar device of MOS structure, and belongs to a power device having high-speed performance of a power MOSFET and Bipolar low-resistance performance. The application range of the IGBT is generally in the region of a withstand voltage of 600V or more, a current of 10A or more, and a frequency of 1kHz or more. The motor is often used in the fields of industrial motors, small-capacity motors for civil use, converters (inverters), stroboscopes for cameras, induction heating electric cookers, and the like. The IGBT is roughly classified into two types, one being a three-terminal one-package type of mold resin sealing, according TO the difference in package, and has been formed in series from TO-3P TO small surface mount. The other is a module type in which IGBTs and fwd (free Wheel diode) are packaged in pairs (2 or 6 groups), and is mainly used in industry, and the types of modules are classified into various shapes and packaging modes according to different purposes, and are serialized.
Example one
According to the split six-phase motor control method integrating alternating current charging, a main control module is respectively connected with control ends of an inversion unit module, a pre-charging module, a motor control switch and an alternating current control switch so as to control the switching of the inversion unit module, the pre-charging module, the motor control switch and the alternating current control switch;
when the system is in a driving mode, the inverter unit module outputs electric energy to the motor driving loop, and the alternating current control switch is switched off when the motor control switch is in a closed state;
on the contrary, when the system is in a charging mode, an external alternating current power supply inputs electric energy to the current conversion module through the alternating current charging socket, and the motor control switch is switched off when the alternating current control switch is in a closed state.
A plurality of motor inductors are arranged in a power input end of each single motor in the six-phase motor in the scheme, and the motor is connected with a plurality of inversion units in the sub-inversion unit modules through the plurality of inductors so as to increase the electric quantity input of alternating current to the motor through multiple inversions.
The inverter units respectively comprise two switching circuits of triodes and diodes which are connected in series, and nodes which are connected in parallel of the two switching circuits are connected with an alternating current control switch of the motor.
Example two
Specifically, the main control unit module (not shown in fig. 2) is respectively connected to the low-voltage signal output terminals of the ac charging socket 205, and receives the low-voltage signal from the charging socket. And the main control unit module judges the working mode according to the received low-voltage signal or the signal of the whole vehicle controller.
For example, when a charging gun of an electric vehicle is connected to an ac charging socket, a low voltage signal of the charging gun activates a low voltage control power supply on the main control unit module, and after the main control unit module is powered on, the operating mode of the system is switched to a charging mode.
Then, the main control unit module detects that the charging gun is connected to the system, and performs information interaction with the charging pile through a PWM signal in the charging gun to confirm the power supply capacity of the charging pile; after the main control unit module confirms that each module of the system has no fault in self-checking, a closing instruction is sent to the first contactor K1 switch, so that the first contactor switch K1 is closed to carry out high-voltage pre-charging of the system, and the contactor K2 is controlled to be closed after the high-voltage pre-charging is finished.
Further, the main control unit module starts the BOOST function of the current transformation module, and the BOOST function is realized through the first capacitor C1, the first inductor L1, the second switch Q2, the first diode D1 and the second capacitor C2, so as to BOOST the voltage of the second capacitor C2; the main control unit module controls the fourth contactor K4 to be closed, controls a PWM signal control switch in the ac charging socket to be closed to convert a 9V PWM signal into a 6V PWM signal, and closes an ac contactor in the charging pile after the charging pile detects the 6V PWM signal, so that single-phase two-wire system ac power enters the conversion system through the ac charging socket, and at this time, the BOOST function of the current conversion module 105 is turned off.
Furthermore, the main control unit module performs data interaction with a Battery Management System (BMS) and a Vehicle Control Unit (VCU) of a vehicle in a controller area network communication manner to know a real-time charging demand of the high-voltage battery, the main control unit module performs rectification and voltage stabilization functions by controlling the second half bridge, the third half bridge module and a PFC power inductor, and then starts a BUCK voltage reduction function of the current transformation module, and a BUCK circuit is formed by the first capacitor C1, the first inductor L1, the first switch Q1, the second diode D2 and the second capacitor C2. The BUCK circuit can achieve the function of taking power from an alternating current power grid power supply and charging the vehicle-mounted high-voltage battery 102.
When the high-voltage battery is fully charged, or a certain part in operation breaks down, or the charging pile artificially stops the operation of the charging process, the charging is required to be stopped. At this moment, the main control unit module firstly closes the rectification function and then closes the BUCK function, the PWM signal is changed into a 9V signal by closing the PWM communication control switch, the charging pile closes the internal alternating current contactor after detecting the 9V signal, the main control unit module disconnects the K2 contactor and the K4 contactor after detecting that the alternating current input voltage signal is cut off, and the main control unit module records the fault and enters the sleep mode.
Based on the scheme, the system can realize the purpose of taking power from an alternating current power grid and charging the vehicle-mounted high-voltage battery 102.
When the system is in a driving mode, the main control unit module activates upper low voltage through a VCU driving enabling signal, confirms a driving working mode with the VCU through bus communication, then closes the motor control switches K5, K6 and K7, waits for the high-voltage battery to be electrified after each module has no fault in self-detection, firstly controls the contactor K1 to be closed to carry out high-voltage pre-charging, and controls the contactor K3 to be closed and disconnect the contactor K1 after the high-voltage pre-charging is finished.
Further, after the main control unit module receives a motor operation instruction sent by the VCU, the current conversion module performs real-time control of the motor in a PWM modulation control mode.
The preferred electric vehicle comprises an integrated ac-charged split six-phase motor control system; an electric vehicle alternating-current charging pile (charging pile for short) is a special power supply device which provides an alternating-current power supply for an electric vehicle with a vehicle-mounted charger in a conduction mode. The electric pile that fills trades electric installation is one kind. The maximum rated power of the single-phase charging pile is 7kW, and the single-phase charging pile is mainly suitable for charging small-sized passenger vehicles (pure electric vehicles or plug-in hybrid electric vehicles). According to the battery capacity allocated to the vehicle, the full charging time generally needs 3-8 hours, and the charging method adopted by the scheme can improve the charging speed and save the charging time by 2-4 times.
Adopt this technical scheme, correspond control independent winding all the way through designing solitary contravariant unit, and then make a plurality of contravariant units simultaneous working, with control split type six-phase motor simultaneous working, can avoid discrete device the problem of not flow equalizing and unreliable that faces in parallel application, simultaneously through multiplexing discrete contravariant unit device integration alternating current charging, in order to realize carrying out the high-power charging of twin gun to new energy automobile simultaneously, the electric quantity input that increases to charge, electric automobile's charging speed has been improved, and be very suitable for the use of present most electric automobile, charging time has not only been shortened, and it is convenient with electric automobile's charging process, be fit for most users ' consumption demand, the time saving cost, increase of efficiency.
The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without modification to the method and technical solution of the present invention, or the present invention can be directly applied to other occasions without modification, all within the scope of the present invention.
Claims (5)
1. The utility model provides an integrated alternating current charging's six looks motor control system of split, its characterized in that: the intelligent power supply comprises a main control module, a driving module, a direct current module, a pre-charging module, an inversion unit module, a split six-phase motor and a PFC inductance module connected to an alternating current socket, wherein the main control module is connected to a signal input end of the pre-charging module through the driving module, the pre-charging module is configured to be connected to the direct current module so as to output a corresponding pre-charging signal to the pre-charging module through the main control module and drive the pre-charging module to receive direct current input, a signal output end of the pre-charging module is connected to the inversion unit module, an alternating current input voltage signal is driven to control the six-phase motor through an alternating current charging port and a split six-phase motor port which are arranged on the inversion unit module, and the inversion unit;
the pre-charge module includes: the second contactor is connected between the positive pole of a high-voltage battery arranged in the system and the second direct current end of the current conversion module; the third contactor is connected between the positive pole of the high-voltage battery and a first direct current end of a current conversion module arranged in the system; the first contactor is connected with the second contactor in parallel after being connected with the first pre-charging resistor in series;
the control ends of the first contactor, the second contactor and the third contactor are respectively connected with a main control unit module arranged in the system;
the pre-charging module is integrated with the high-voltage battery.
2. The split six-phase motor control system with integrated ac charging according to claim 1, wherein the inverter unit modules include six sub-inverter unit modules corresponding to the input terminals of the six-phase motor and connected in parallel with each other, each sub-inverter unit module has a plurality of parallel inverter units connected to the single-phase motor, the PFC inductor modules between the inverter unit modules and the six-phase motor are connected in series with FPC inductors corresponding to the number of the inverter units, the system includes two ac sockets and FPC inductor modules corresponding to the six-phase motor, the FPC inductor modules are connected to the ac sockets through ac switches, the motor is provided with rotor sensors to convert the position signals of the permanent magnet rotor magnetic field into electrical signals, and provide correct commutation information for the logic switch circuit.
3. The split six-phase motor control system with integrated ac charging of claim 1, further comprising an AD conversion module and a current detection module, wherein the main control module is configured to be connected to the current detection module through the AD conversion module, an input end of the current detection module is connected to an output end of the inverter unit module, and the current detection module has two output ends and is respectively connected to the six-phase motor and the PFC module, so as to control the inverter unit module to input voltage to the six-phase motor through a signal output by the main control module.
4. The split six-phase motor control system with integrated ac charging of claim 1, wherein a fuse module is disposed between the pre-charge module and the inverter unit module, and the pre-charge module is configured to be connected to the inverter unit module through the fuse module.
5. The split six-phase motor control system integrated with alternating current charging according to claim 2, wherein the inverter unit is an insulated gate bipolar transistor, and the sub-inverter unit modules are formed by a plurality of insulated gate bipolar transistors connected in parallel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921259184.8U CN211321251U (en) | 2019-08-06 | 2019-08-06 | Split type six-phase motor control system integrated with alternating current charging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921259184.8U CN211321251U (en) | 2019-08-06 | 2019-08-06 | Split type six-phase motor control system integrated with alternating current charging |
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| CN211321251U true CN211321251U (en) | 2020-08-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110957957A (en) * | 2019-08-06 | 2020-04-03 | 芜湖瑞来电子科技有限公司 | Split type six-phase motor control system integrated with alternating current charging and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110957957A (en) * | 2019-08-06 | 2020-04-03 | 芜湖瑞来电子科技有限公司 | Split type six-phase motor control system integrated with alternating current charging and method thereof |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Yuemin Inventor after: Qu Ren Inventor after: Gao Jinwen Inventor before: Li Yuemin Inventor before: Qu Ren Inventor before: Gao Jinwen Inventor before: Zheng Kefeng |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200821 |