CN105730562B - A kind of anti-theft system of electromotor car and a kind of electric vehicle anti-theft method - Google Patents
A kind of anti-theft system of electromotor car and a kind of electric vehicle anti-theft method Download PDFInfo
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- CN105730562B CN105730562B CN201610094086.8A CN201610094086A CN105730562B CN 105730562 B CN105730562 B CN 105730562B CN 201610094086 A CN201610094086 A CN 201610094086A CN 105730562 B CN105730562 B CN 105730562B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62H—CYCLE STANDS; SUPPORTS OR HOLDERS FOR PARKING OR STORING CYCLES; APPLIANCES PREVENTING OR INDICATING UNAUTHORIZED USE OR THEFT OF CYCLES; LOCKS INTEGRAL WITH CYCLES; DEVICES FOR LEARNING TO RIDE CYCLES
- B62H5/00—Appliances preventing or indicating unauthorised use or theft of cycles; Locks integral with cycles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62H—CYCLE STANDS; SUPPORTS OR HOLDERS FOR PARKING OR STORING CYCLES; APPLIANCES PREVENTING OR INDICATING UNAUTHORIZED USE OR THEFT OF CYCLES; LOCKS INTEGRAL WITH CYCLES; DEVICES FOR LEARNING TO RIDE CYCLES
- B62H5/00—Appliances preventing or indicating unauthorised use or theft of cycles; Locks integral with cycles
- B62H5/20—Appliances preventing or indicating unauthorised use or theft of cycles; Locks integral with cycles indicating unauthorised use, e.g. acting on signalling devices
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- Mechanical Engineering (AREA)
- Lock And Its Accessories (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The invention discloses a kind of anti-theft system of electromotor car and a kind of electric vehicle anti-theft method, anti-theft system of electromotor car includes motor, electric machine controller and intelligent anti-theft controller, and A phases speed probe, B phases speed probe and C phase speed probes are separately installed with motor.Electric machine controller includes auxiliary power module, the first CPU element, anti-theft signal detection module, lock motor module and motor anti-theft module；Intelligent anti-theft controller includes power supply output module, the second CPU element, motor turn signal detection module and the locked control output module of motor, the first CPU element and communicated to connect with second CPU element by order wire.The invention also discloses a kind of electric vehicle anti-theft method, good anti-theft effect of the present invention, the loss by theft rate of electric car is greatly reduced.
Description
Technical field
The present invention relates to vehicle anti-theft technical field, is to be related to a kind of anti-theft system of electromotor car and a kind of electricity specifically
Motor-car theft preventing method.
Background technology
Electric car is because speed is fast, light, manually advantage is not widely used in China to pedal etc..But electric car is occupying
Because its portability is easily stolen when family's storage, trip parking.User is in house storage electric car or trip parking one
As by chain lock either mortise lock pin electric car front-wheel or trailing wheel, such a antitheft mode reliability is not high, chain lock or
Person's mortise lock is easy to stolen personnel and opened, and electric car then is stolen into use or sold off.User is entangled with existing electronic
The problem of car is easily stolen, the use to user are made troubles.
The content of the invention
First technical problem to be solved by this invention be：A kind of anti-theft system of electromotor car of good anti-theft effect is provided.
Second technical problem to be solved by this invention be：A kind of electric vehicle anti-theft method of good anti-theft effect is provided.
To solve above-mentioned first technical problem, the technical scheme is that：
A kind of anti-theft system of electromotor car, including motor, electric machine controller and intelligent anti-theft controller, on the motor respectively
A phases speed probe, B phases speed probe and C phase speed probes are installed；
The electric machine controller includes：
Auxiliary power module, for providing power supply to the electric machine controller；
First CPU element, first CPU element electrically connect with the auxiliary power module；
Anti-theft signal detection module, the output end of the anti-theft signal detection module electrically connect first CPU element
One signal input part, the anti-theft signal detection module are used for the anti-theft signal output letter for detecting the intelligent anti-theft controller
Number and pass to first CPU element；
Motor module is locked, motor module locks motor module to the lock including A phases respectively, B phases lock motor module and lock electricity with C phases
Machine module, the A phases lock motor module, B phases lock motor module and C phases and lock motor module to be electrically connected the first CPU mono-
One signal output part of member, the lock motor module are used for the driving power output for closing the motor；
Motor anti-theft module, the motor anti-theft module include micro-control unit, and the signal of the A phases speed probe is defeated
Go out after end, B phase signals of rotational speed sensor output ends and C phase signals of rotational speed sensor output ends are connected in parallel to be electrically connected to described micro-
One signal input part of control unit, it is mono- that a signal output part of the micro-control unit is electrically connected to the first CPU
One signal input part of member, the motor anti-theft module are used for the operating condition for detecting the motor；
The intelligent anti-theft controller includes：
Power supply output module, for providing power supply, the power output end of the power supply output module electrically connects the auxiliary
The power input of power module；
Second CPU element, an output end of second CPU element electrically connect the control of the power supply output module
End；
Bluetooth module, the bluetooth module communicate to connect with second CPU element, the bluetooth module and user's intelligence
Mobile phone wireless communicates to connect；
Motor turn signal detection module, the signal output part electrical connection described the of the motor turn signal detection module
The signal input part of two CPU elements；
The locked control output module of motor, the signal input part electrical connection of the locked control output module of the motor described the
One signal output part of two CPU elements, the signal output part of the locked control output module of motor electrically connect the motor
The anti-theft signal detection module of controller；
First CPU element is communicated to connect with second CPU element by order wire.
Preferably, the A phases speed probe, B phases speed probe and C phases speed probe use Hall element.
To solve above-mentioned second technical problem, the technical scheme is that：
A kind of electric vehicle anti-theft method, comprises the following steps：
A, when user carries smart mobile phone close to vehicle, the Bluetooth communication of mobile phone is opened, makes user's smart mobile phone and intelligence
The Bluetooth signal successful matching of energy anti-theft controller, released and set by the smart mobile phone authorization control intelligent anti-theft controller of user
Anti- state, intelligent anti-theft controller close the output signal of the locked control output module of motor, the lock motor mould of electric machine controller
Block does not turn off the driving power output of motor, and intelligent anti-theft controller carries out communication link by order wire and electric machine controller
Connect, electric machine controller is entered mode of operation, car owner's unlocking vehicle traveling；
B, after user's traveling arrives at parking, the Bluetooth signal of user's smart mobile phone and intelligent anti-theft controller is made
Successful matching, armed state, now intelligent anti-theft control are entered by the smart mobile phone authorization control intelligent anti-theft controller of user
Device processed can disconnect the communication connection with electric machine controller by order wire, electric machine controller is completed self-locking immediately, close external
Output enters non-operating mode, the locked control output module output lock motor signal of motor of intelligent anti-theft controller, motor control
After the lock motor module of device processed receives the lock motor signal of intelligent anti-theft controller, motor is set to enter off-position, motor delays
It is slow to slow down, detect that the speed of motor drops to by A phases speed probe, B phases speed probe and C phase speed probes
During below 10km/h, electric machine controller can pin motor, make electric car not by locking phase line short circuit of the motor module by motor
Front and rear rotation can be carried out by external force, i.e., can not be carried out；
C, after intelligent anti-theft controller enters armed state, when motor turn signal detection module detects vehicle wheel rotation
Or the signal of vibrations is when passing to intelligent anti-theft controller, the second CPU element output alarm signal.
After employing above-mentioned technical proposal, the beneficial effects of the invention are as follows：
The anti-theft system of electromotor car and its theft preventing method of the present invention, when user carries smart mobile phone close to vehicle, open
The Bluetooth communication of mobile phone, make the Bluetooth signal successful matching of user's smart mobile phone and intelligent anti-theft controller, pass through the intelligence of user
Energy mobile phone authorization control intelligent anti-theft controller releases armed state, and intelligent anti-theft controller closes the locked control output mould of motor
The output signal of block, the lock motor module of electric machine controller do not turn off the driving power output of motor, intelligent anti-theft controller
It is communicatively coupled by order wire and electric machine controller, electric machine controller is entered mode of operation, car owner's unlocking vehicle traveling；
After user's traveling arrives at parking, make the Bluetooth signal successful matching of user's smart mobile phone and intelligent anti-theft controller,
Armed state is entered by the smart mobile phone authorization control intelligent anti-theft controller of user, now intelligent anti-theft controller can pass through
Order wire disconnects the communication connection with electric machine controller, electric machine controller is completed self-locking immediately, and the external output of closing enters non-
Mode of operation, the locked control output module output lock motor signal of motor of intelligent anti-theft controller, the lock electricity of electric machine controller
After machine module receives the lock motor signal of intelligent anti-theft controller, motor is set to enter off-position, motor slowly slows down, passed through
When A phases speed probe, B phases speed probe and C phase speed probes detect that the speed of motor drops to below 10km/h, electricity
Machine controller can pin motor, prevent electric car from being carried out by external force by locking phase line short circuit of the motor module by motor
It front and rear rotation, i.e., can not carry out, realize antitheft purpose；After intelligent anti-theft controller enters armed state, when motor turns
When dynamic signal detection module detects that the signal of vehicle wheel rotation or vibrations passes to intelligent anti-theft controller, the second CPU element
Output alarm signal.Therefore, anti-theft system of electromotor car of the invention and electric vehicle anti-theft method, as long as being taken when user gos out certainly
Oneself smart mobile phone, it is possible to Bluetooth communication is carried out by the intelligent anti-theft controller of smart mobile phone and electric car, is automatically performed
Set up defences and releasing is set up defences, it is convenient for users, the antitheft purpose of electric car is have effectively achieved, reduces the stolen of electric car
Rate.And after three big core component in electric car, i.e. intelligent anti-theft controller, electric machine controller and motor enter armed state, must
It must can be used by owner's smart mobile phone mandate rear, robber can not contact armed state, can not be by the three of electric car big cores
Part split be applied to other electric cars use, improve robber handle theft vehicle difficulty, improve robber be caught it is several
Rate, force robber not steal the electric car of this structure again, greatly reduce the loss by theft rate of electric car.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is the theory diagram of the anti-theft system of electromotor car of the present invention；
Fig. 2 is connecing between intelligent anti-theft controller, electric machine controller and motor in anti-theft system of electromotor car of the invention
Line chart；
Fig. 3 is the circuit theory diagrams of the anti-theft system of electromotor car of the present invention；
In figure：1st, electric machine controller；11st, auxiliary power module；12nd, the first CPU element；13rd, anti-theft signal detection module；
14th, motor module is locked；15th, motor anti-theft module；2nd, intelligent anti-theft controller；21st, power supply output module；22nd, the 2nd CPU is mono-
Member；23rd, bluetooth module；24th, motor turn signal detection module；25th, the locked control output module of motor；3rd, motor；31st, A phases
Speed probe；32nd, B phases speed probe；33rd, C phases speed probe.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Reference picture 1, Fig. 2 and Fig. 3, anti-theft system of electromotor car of the invention, including motor 3, electric machine controller 1 and intelligence
Anti-theft controller 2, A phases speed probe 31, B phases speed probe 32 and C phase speed probes are separately installed with motor 3
33, A phase speed probes 31, B phases speed probe 32 and C phases speed probe 33 use Hall element.
Electric machine controller 1 includes auxiliary power module 11, the first CPU element 12, anti-theft signal detection module 13, lock motor
Module 14 and motor anti-theft module 15.
Wherein, the first CPU element 12 electrically connects with auxiliary power module 11, and auxiliary power module 11 is outside after switching on power
+ 3.3V voltages are exported to power to the first CPU element 12.
Anti-theft signal detection module 13 is used to detecting the anti-theft signal output signal of intelligent anti-theft controller 2 and passes to the
One CPU element 12.Anti-theft signal from intelligent anti-theft controller 2, eventually through being output to the first CPU element after resistance R31
12 the 20th pin.After the first CPU element 12 receives the anti-theft signal from intelligent anti-theft controller 2, the first CPU is mono-
Member 12 will enter self-locking pattern automatically by internal processes, when the first CPU element 12 receives the antitheft letter of intelligent anti-theft controller 2
After number unlocking signal, the first CPU element 12 can exit self-locking pattern automatically by internal processes, i.e. all working enters normal work
Make state, otherwise do not work.
Motor module 14 locks motor module to lock including A phases respectively, B phases lock motor module and lock motor module with C phases, and A phases are locked
Motor module, B phases lock motor module and C phases and lock the signal output part that motor module is electrically connected the first CPU element 12,
Lock motor module 14 is used for the driving power output for closing motor 3.Battery of electric vehicle is connected on per the VDD in mutually lock motor module
Positive pole, GND connects the negative pole of battery of electric vehicle.The output of A ends, the output of B ends, C-terminal export A, B, C phase line for connecing motor respectively,
Powered to motor.
Motor anti-theft module 15 includes the signal output part of micro-control unit U15, A phase speed probe 31, B phases rotating speed passes
The signal output part of sensor 32 and the signal output part of C phases speed probe 33 are electrically connected to micro-control unit after being connected in parallel
A U15 signal input part, a micro-control unit U15 signal output part are electrically connected to one of the first CPU element 12
Signal input part, Hall element H1, H2 and H3 of three-phase installation VCC meet+5v respectively on motor 3, and all VSS are all grounded.
Micro-control unit U15 is communicated by GP5 with the first CPU element 12, motor anti-theft module 15 be used for by Hall element H1,
The operating condition of H2 and H3 detection motors 3, and the operating condition of motor 3 is sent to the first CPU element 12.
For first CPU element 12 after the antitheft instruction of the output of intelligent anti-theft controller 2 is received, the first CPU element 12 is logical
While crossing internal processes and enter self-locking, micro-control unit U15 GP5 can be signaled to by the 37th pin.Now,
Micro-control unit U15 can be managed by the mos that GP4 pins connect, and disconnect and the ground wire of three Hall elements is connected, make three Halls
Element can not work.
Intelligent anti-theft controller 2 includes power supply output module 21, the second CPU element 22, bluetooth module 23, motor and rotates letter
Number detection module 24 and the locked control output module 25 of motor.
Power supply output module 21 is used to provide power supply, such as the power output end electrical connection auxiliary electricity of power supply output module 21
The power input of source module 11, power supply is provided to auxiliary power module 11.VDD in power supply output module 21 connects electric car electricity
Relay is given in cell voltage positive pole, the normally opened contact K1 that relay RLY-48 passes through relay RLY-48 disconnection and adhesive respectively
RLY-48 the 4th pin and the 5th pin powered realize the line power supply of accessory power supply front-end module.The first of relay RLY-48
Added with diode between pin and second pin, an output end electric connection of power supply output module 21 of the second CPU element 22
Control terminal.
Bluetooth module (not showed that in figure) communicates to connect with the second CPU element 22, and bluetooth module and user's intelligence hand
Machine radio communication connects.
In the locked control output module 25 of motor, the 13rd pin of the second CPU element 22 passes through R12 resistance and triode
Q1 connections, other two pins of triode Q1 connect both positive and negative polarity respectively, and positive pole is connected by resistance R16 and anti-theft signal detection module 13
Connect.
The signal output part of motor turn signal detection module 24 electrically connects the signal input part of the second CPU element 22.When
After intelligent anti-theft controller 2, electric machine controller 1, motor 3 enter anti-theft state, no matter motor turn signal detection module 24 is examined
Measure the phase place change or vibration signal of motor 3, the first CPU element 12 all can be by closing A, B, C down tube by electromechanical locks
Extremely, after A, B, C down tube Close All, motor can not be rotated, no matter it is front and rear can not rotate, realize lock motor work(
Energy.
First CPU element 12 is communicated to connect with the second CPU element 22 by order wire.
The invention also discloses a kind of electric vehicle anti-theft method, comprise the following steps：
A, when user carries smart mobile phone close to vehicle, the Bluetooth communication of mobile phone is opened, makes user's smart mobile phone and intelligence
The Bluetooth signal successful matching of energy anti-theft controller, released and set by the smart mobile phone authorization control intelligent anti-theft controller of user
Anti- state, intelligent anti-theft controller close the output signal of the locked control output module of motor, the lock motor mould of electric machine controller
Block does not turn off the driving power output of motor, and intelligent anti-theft controller carries out communication link by order wire and electric machine controller
Connect, electric machine controller is entered mode of operation, car owner's unlocking vehicle traveling；
B, after user's traveling arrives at parking, the Bluetooth signal of user's smart mobile phone and intelligent anti-theft controller is made
Successful matching, armed state, now intelligent anti-theft control are entered by the smart mobile phone authorization control intelligent anti-theft controller of user
Device processed can disconnect the communication connection with electric machine controller by order wire, electric machine controller is completed self-locking immediately, close external
Output enters non-operating mode, the locked control output module output lock motor signal of motor of intelligent anti-theft controller, motor control
After the lock motor module of device processed receives the lock motor signal of intelligent anti-theft controller, motor is set to enter off-position, motor delays
It is slow to slow down, detect that the speed of motor drops to by A phases speed probe, B phases speed probe and C phase speed probes
During below 10km/h, electric machine controller can pin motor, make electric car not by locking phase line short circuit of the motor module by motor
Front and rear rotation can be carried out by external force, i.e., can not be carried out；
C, after intelligent anti-theft controller enters armed state, when motor turn signal detection module detects vehicle wheel rotation
Or the signal of vibrations is when passing to intelligent anti-theft controller, the second CPU element output alarm signal.
The anti-theft system of electromotor car and theft preventing method of the present invention, as long as taking the smart mobile phone of oneself when user gos out, just
Bluetooth communication can be carried out by the intelligent anti-theft controller of smart mobile phone and electric car, be automatically performed and set up defences and releasing is set up defences,
It is convenient for users, the antitheft purpose of electric car is have effectively achieved, reduces the loss by theft rate of electric car.And three in electric car
After big core component, i.e. intelligent anti-theft controller, electric machine controller and motor enter armed state, it is necessary to by owner's intelligence hand
Machine mandate rear can be used, and robber can not contact armed state, can not split the three of electric car big core components and be applied to it
Its electric car uses, and improves the difficulty that robber handles theft vehicle, improves the probability that robber is caught, force robber will not be again
The electric car of this structure is stolen, greatly reduces the loss by theft rate of electric car.
Citing described above for best mode for carrying out the invention, wherein the part do not addressed in detail is that this area is common
The common knowledge of technical staff.Protection scope of the present invention is defined by the content of claim, any technology based on the present invention
The equivalent transformation for enlightening and carrying out, also within protection scope of the present invention.
Claims (3)
1. a kind of anti-theft system of electromotor car, it is characterised in that described including motor, electric machine controller and intelligent anti-theft controller
A phases speed probe, B phases speed probe and C phase speed probes are separately installed with motor；
The electric machine controller includes：
Auxiliary power module, for providing power supply to the electric machine controller；
First CPU element, first CPU element electrically connect with the auxiliary power module；
Anti-theft signal detection module, the output end of the anti-theft signal detection module electrically connect one of first CPU element
Signal input part, the anti-theft signal detection module is for detecting the anti-theft signal output signal of the intelligent anti-theft controller simultaneously
Pass to first CPU element；
Motor module is locked, motor module locks motor module to the lock including A phases respectively, B phases lock motor module and lock motor mould with C phases
Block, the A phases lock motor module, B phases lock motor module and lock motor module with C phases and are electrically connected first CPU element
One signal output part, the lock motor module are used for the driving power output for closing the motor；
Motor anti-theft module, the motor anti-theft module include micro-control unit, the signal output of the A phases speed probe
End, B phase signals of rotational speed sensor output ends and C phase signals of rotational speed sensor output ends are electrically connected to the micro-control after being connected in parallel
One signal input part of unit processed, a signal output part of the micro-control unit are electrically connected to first CPU element
A signal input part, the motor anti-theft module is used to detect the operating condition of the motor；
The intelligent anti-theft controller includes：
Power supply output module, for providing power supply, the power output end of the power supply output module electrically connects the accessory power supply
The power input of module；
Second CPU element, an output end of second CPU element electrically connect the control terminal of the power supply output module；
Bluetooth module, the bluetooth module communicate to connect with second CPU element, the bluetooth module and user's smart mobile phone
Radio communication connects；
Motor turn signal detection module, the signal output part electrical connection described second of the motor turn signal detection module
The signal input part of CPU element；
The locked control output module of motor, the signal input part electrical connection described second of the locked control output module of motor
One signal output part of CPU element, the signal output part of the locked control output module of motor electrically connect the motor control
The anti-theft signal detection module of device processed；
First CPU element is communicated to connect with second CPU element by order wire.
2. anti-theft system of electromotor car as claimed in claim 1, it is characterised in that the A phases speed probe, B phases rotating speed pass
Sensor and C phases speed probe use Hall element.
3. a kind of electric vehicle anti-theft method of anti-theft system of electromotor car using described in claim 1, it is characterised in that including with
Lower step：
A, when user carries smart mobile phone close to vehicle, the Bluetooth communication of mobile phone is opened, makes user's smart mobile phone anti-with intelligence
The Bluetooth signal successful matching of controller is stolen, shape of setting up defences is released by the smart mobile phone authorization control intelligent anti-theft controller of user
State, intelligent anti-theft controller close the output signal of the locked control output module of motor, and the lock motor module of electric machine controller is not
The driving power output of motor is turned off, intelligent anti-theft controller is communicatively coupled by order wire and electric machine controller, made
Electric machine controller enters mode of operation, car owner's unlocking vehicle traveling；
B, after user's traveling arrives at parking, match the Bluetooth signal of user's smart mobile phone and intelligent anti-theft controller
Success, enters armed state, now intelligent anti-theft controller by the smart mobile phone authorization control intelligent anti-theft controller of user
The communication connection with electric machine controller can be disconnected by order wire, electric machine controller is completed self-locking immediately, closes externally output
Into non-operating mode, the locked control output module output lock motor signal of motor of intelligent anti-theft controller, electric machine controller
Lock motor module receive the lock motor signal of intelligent anti-theft controller after, motor is entered off-position, motor slowly subtracts
Speed, by A phases speed probe, B phases speed probe and C phase speed probes detect the speed of motor drop to 10km/h with
When lower, electric machine controller can pin motor, prevent electric car from by outer by locking phase line short circuit of the motor module by motor
Power carries out front and rear rotation, i.e., can not carry out；
C, intelligent anti-theft controller enter armed state after, when motor turn signal detection module detect vehicle wheel rotation or
When the signal of vibrations passes to intelligent anti-theft controller, the second CPU element output alarm signal.
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| CN108820085A (en) * | 2018-06-28 | 2018-11-16 | 安徽天瑞电子科技有限公司 | A kind of alarming system of electric car and alarm method |
| CN112550528A (en) * | 2020-11-23 | 2021-03-26 | 江苏科技大学 | Anti-theft control device and control method for electric tricycle |
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| CN204567572U (en) * | 2015-04-22 | 2015-08-19 | 宁夏艾力特车业有限公司 | A kind of electric vehicle intelligent alarms system and anti-joyride device |
| CN104773133A (en) * | 2015-04-24 | 2015-07-15 | 陈万元 | Antitheft device for electric vehicle and password riding method of antitheft device for electric vehicle |
| CN204915585U (en) * | 2015-07-07 | 2015-12-30 | 天津安中通讯电子有限公司 | Electric motor car electric machine control function drive anti -theft system |
| CN205469384U (en) * | 2016-02-19 | 2016-08-17 | 山东比德文动力科技有限公司 | Electromobile antitheft system |
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|---|---|
| CN105730562A (en) | 2016-07-06 |
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Inventor after: Xu Quanlai Inventor after: Song Cunzhu Inventor after: Zhang Jun Inventor before: Xu Quanlai Inventor before: Li Xiuyi Inventor before: Song Cunzhu Inventor before: Zhang Jun |
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Effective date of registration: 20180228 Address after: 214000 Jiangsu District, Wuxi City, Xishan District, anzhen Street Dacheng Industrial Park A District Applicant after: Wuxi bidewen Power Technology Co., Ltd. Applicant after: TIANJIN BYVIN SCIENCE & TECHNOLOGY CO., LTD. Address before: 262424 Zhu Liu Industrial Park, Changle County, Weifang City, Shandong Province, south of the 309 National Road East of Tuan Road, east of Tuan Road Applicant before: Shandong Bidewen Power Technology Co., Ltd. |
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