CN110474300A - A kind of battery of electric vehicle overvoltage protective system - Google Patents
A kind of battery of electric vehicle overvoltage protective system Download PDFInfo
- Publication number
- CN110474300A CN110474300A CN201910696243.6A CN201910696243A CN110474300A CN 110474300 A CN110474300 A CN 110474300A CN 201910696243 A CN201910696243 A CN 201910696243A CN 110474300 A CN110474300 A CN 110474300A
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- CN
- China
- Prior art keywords
- voltage
- battery
- module
- terminal
- electric vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- 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
Abstract
The invention discloses a kind of battery of electric vehicle overvoltage protective systems, including battery module, battery charging module, battery discharge module, reference voltage terminal, first detection terminal, second detection terminal and execution terminal, the battery charging module is used to control the charging of battery, its effective object is battery of electric vehicle, the battery discharge module is used to control the electric discharge of battery, its effective object is electric vehicle, the reference voltage terminal is for limiting voltage rating of the battery in charge and discharge, overvoltage protection detection and transmission open command when the first detection terminal charges for battery, the second detection terminal is used for overvoltage protection detection and transmission open command when battery discharge, the terminal that executes is used to receive and execute the open command from the first detection terminal with the second detection terminal, the present invention protects battery charging and discharging over-voltage Shield collection is integrated, and protects battery of electric vehicle from excessive pressure damages, while simplifying battery discharge overvoltage protective system, improves its operational efficiency.
Description
Technical field
The present invention relates to battery of electric vehicle fields, and in particular to a kind of battery of electric vehicle overvoltage protective system.
Background technique
Electric vehicle, i.e. electric drive vehicle also known as electricity are driven, and electric vehicle is divided into alternating current electric vehicle and DC electric car, usually
The electric vehicle said is, by components such as controller, motors, to convert electrical energy into mechanical energy movement using battery as energy source,
To control the vehicle that size of current changes speed, wherein battery of electric vehicle is the power resources on electric vehicle, present electric vehicle
Upper most dress is lead-acid accumulator, and lead-acid accumulator is at low cost, and cost performance is high, can be with because this battery can charge
Reusability, thus it be referred to as " lead-acid accumulator, but existing battery of electric vehicle in charge and discharge there are over-voltage phenomenon, one
The over-voltage of denier battery will damage, and a battery of electric vehicle protection system is needed to protect battery thus；
Existing battery of electric vehicle overvoltage protective system initially only considers single charging over-voltage in design or puts simultaneously
Electric over-voltage still will cause the damage of battery of electric vehicle, and when designing battery of electric vehicle electric discharge overvoltage protective system, circuit
And its external component is complex, causes the response of protection system to pass through multiple components, responds slower.
Summary of the invention
In order to solve the above technical problems, the purpose of the present invention is to provide a kind of battery of electric vehicle overvoltage protection systems
System.
The technical problems to be solved by the invention are as follows:
(1) how to guarantee battery of electric vehicle charge and discharge overvoltage protection simultaneously.
(2) how to simplify battery discharge overvoltage protective system and guarantee its normal operation.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of battery of electric vehicle overvoltage protective system, including battery module, battery charging module, battery discharge module, base
Quasi- voltage end, the first detection terminal, the second detection terminal and execution terminal, the battery charging module is for controlling filling for battery
Electricity, effective object are battery of electric vehicle, and the battery discharge module is used to control the electric discharge of battery, and effective object is electronic
Vehicle, the reference voltage terminal are filled for limiting voltage rating of the battery in charge and discharge, the first detection terminal for battery
Overvoltage protection detection and transmission open command when electric, the second detection terminal are used for overvoltage protection inspection when battery discharge
Open command is surveyed and sends, the terminal that executes is used to receive and execute the open command from the first detection terminal, simultaneously
Battery charging module is disconnected, the terminal that executes is also used to receive and execute the open command from the second detection terminal, simultaneously
Disconnect battery discharge module；
The first detection terminal includes voltage acquisition module, voltage comparison module and voltage alarm control module, described
Voltage acquisition module is electrically connected with battery charging module, and the voltage acquisition module also electrically connects with voltage comparison module
Connect, the voltage comparison module and reference voltage terminal are electrically connected, the voltage comparison module also with voltage alarm control module
It is electrically connected, the voltage acquisition module is used to acquire charging voltage when battery charging, and the voltage comparison module is used for will
The charging voltage of acquisition receive and compare the two with reference voltage, and the voltage alarm control module includes voltage
Alarm unit and voltage control unit, the voltage control unit is for control system ceiling voltage and transmits the information of over-voltage extremely
Terminal is executed, the voltage alarm unit is used for over voltage alarm when battery charging and discharging；
The second detection terminal includes zener diode, switch control module, the zener diode and battery module
It is electrically connected, the zener diode is also electrically connected with switch control module, the switch control module and execution terminal electricity
Property connection, the stabistor is described to open for determining whether cell discharge voltage is higher than preset reference voltage terminal voltage
Control module is closed to be used to control the circuit switch of zener diode and battery module and be used to transmit the information of battery over-voltage and break
Instruction is opened to execution terminal.
Further, the voltage alarm unit is combined aural and visual alarm.
Further, the specific method of the first detection terminal detection battery charging module over-voltage:
S1, voltage acquisition module acquire the voltage of voltage and reference voltage terminal when battery charges, and battery is charged
When voltage and the voltage of reference voltage terminal carry out being transmitted to voltage comparison module and compare, then comparing result is transmitted to electricity
Press alarm control module；
S2, in the voltage-contrast result that voltage alarm control module receives, if voltage and benchmark electricity when battery charges
The voltage of pressure side matches then without any operation, and battery charging module continues to run, if voltage when battery charges is greater than
The voltage of reference voltage terminal, the information of the battery charging over-voltage of voltage control unit transmission at this time is to executing terminal.
Further, it the specific method for executing terminal and executing battery charging module over-voltage: executes terminal and receives
It from the information of voltage control unit charging over-voltage, and is compared with the logical signal of itself, immediately will after meeting over-voltage information
Circuit disconnects between battery charging module and battery.
Further, the switch control module is NPN triode.
Further, the specific method of the second detection terminal detection battery discharge module over-voltage: under normal condition, surely
The voltage rating of pressure diode is slightly above the safe voltage of battery output, and zener diode operates normally, when battery discharge electricity
When pressure is higher than preset reference voltage terminal voltage, zener diode is breakdown, at this time the over-voltage of battery discharge module.
Further, the specific method for executing terminal and executing the over-voltage of battery discharge module: when stabistor is hit
After wearing, the direct closure switch of switch control module, and the information for transmitting battery discharge over-voltage simultaneously executes terminal to terminal is executed
Circuit between battery discharge module and battery is disconnected immediately.
Beneficial effects of the present invention:
(1) the battery charging of electric vehicle is detected with the second detection terminal by the first detection terminal of setting respectively and is put
When electric whether over-voltage, and by be arranged execution terminal battery of electric vehicle over-voltage is protected, comparing tradition can only be one-sided
Detection charging over-voltage is simultaneously protected or electric discharge over-voltage is simultaneously protected, and leads to this disadvantage of cell damage, and the present invention is by battery charging and discharging
Overvoltage protection collection is integrated, and more has hommization, protects battery of electric vehicle from excessive pressure damages；
(2) by be arranged second detection terminal and execute terminal match, can more quick response electric vehicle electricity
Over-voltage information when tank discharge, and battery of electric vehicle being protected in time, while when comparing traditional battery of electric vehicle electric discharge
Overvoltage protective system formed with less components, and then simple and fast carry out battery overvoltage protection, when system is run
Mainly since under normal condition, the voltage rating of zener diode is slightly above the safe voltage of battery output, two pole of pressure stabilizing
Pipe operates normally, and when cell discharge voltage is higher than preset reference voltage terminal voltage, zener diode is breakdown, at this time battery
Discharge module over-voltage, direct closure switch of switch control module later, and the information of battery discharge over-voltage is transmitted simultaneously to executing
Terminal executes terminal and immediately disconnects circuit between battery discharge module and battery.
Detailed description of the invention
The present invention will be further described below with reference to the drawings.
Fig. 1 is system flow chart of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Refering to Figure 1, a kind of battery of electric vehicle overvoltage protective system is present embodiments provided, including battery module,
Battery charging module, battery discharge module, reference voltage terminal, the first detection terminal, the second detection terminal and execution terminal, battery
Charging module is used to control the charging of battery, and effective object is battery of electric vehicle, and battery discharge module is for controlling battery
Electric discharge, effective object are electric vehicle, and reference voltage terminal is for limiting voltage rating of the battery in charge and discharge, and the first detection is eventually
Overvoltage protection detection and transmission open command when end is for battery charging, the second detection terminal are used for mistake when battery discharge
Pressure protection detection and transmission open command execute terminal and are used to receive and execute the open command from the first detection terminal,
Battery charging module is simultaneously switched off, terminal is executed and is also used to receive and execute the open command from the second detection terminal, simultaneously
Disconnect battery discharge module；
First detection terminal includes voltage acquisition module, voltage comparison module and voltage alarm control module, voltage acquisition
Module and battery charging module are electrically connected, and voltage acquisition module is also electrically connected with voltage comparison module, voltage comparison module
It is electrically connected with reference voltage terminal, voltage comparison module is also electrically connected with voltage alarm control module, and voltage acquisition module is used
Charging voltage when acquiring battery charging, voltage comparison module is for receiving the charging voltage of acquisition with reference voltage
And compare the two, voltage alarm control module includes voltage alarm unit and voltage control unit, voltage control unit
For control system ceiling voltage and transmit the information of over-voltage to executing terminal, when voltage alarm unit is used for battery charging and discharging
Over voltage alarm；
Second detection terminal includes zener diode, switch control module, and zener diode and battery module are electrically connected,
Zener diode is also electrically connected with switch control module, and switch control module and execution terminal are electrically connected, stabistor
For determining whether cell discharge voltage is higher than preset reference voltage terminal voltage, switch control module is for controlling two pole of pressure stabilizing
Information of the pipe with the circuit switch of battery module and for transmitting battery over-voltage and open command are to executing terminal.
Voltage alarm unit is combined aural and visual alarm.
The specific method of first detection terminal detection battery charging module over-voltage:
S1, voltage acquisition module acquire the voltage of voltage and reference voltage terminal when battery charges, and battery is charged
When voltage and the voltage of reference voltage terminal carry out being transmitted to voltage comparison module and compare, then comparing result is transmitted to electricity
Press alarm control module；
S2, in the voltage-contrast result that voltage alarm control module receives, if voltage and benchmark electricity when battery charges
The voltage of pressure side matches then without any operation, and battery charging module continues to run, if voltage when battery charges is greater than
The voltage of reference voltage terminal, the information of the battery charging over-voltage of voltage control unit transmission at this time is to executing terminal.
It executes the specific method that terminal executes battery charging module over-voltage: executing terminal and receive from voltage control unit
Charge the information of over-voltage, and is compared with the logical signal of itself, meet after over-voltage information immediately by battery charging module with
Circuit disconnects between battery.
Switch control module is NPN triode.
The specific method of second detection terminal detection battery discharge module over-voltage: under normal condition, the volume of zener diode
Constant voltage is slightly above the safe voltage of battery output, and zener diode operates normally, when cell discharge voltage is higher than preset
When reference voltage terminal voltage, zener diode is breakdown, at this time the over-voltage of battery discharge module.
Execute the specific method that terminal executes the over-voltage of battery discharge module: after stabistor is breakdown, switch control
The direct closure switch of module, and the information for transmitting battery discharge over-voltage simultaneously executes terminal and immediately puts battery to terminal is executed
Circuit disconnects between electric module and battery.
The specific work process of the present embodiment is as follows:
Voltage and benchmark when charging battery of electric vehicle overvoltage protection, when voltage acquisition module acquisition battery charges first
The voltage of voltage end, and the voltage of the voltage and reference voltage terminal when battery is charged carries out being transmitted to voltage comparison module progress
Comparison, then comparing result is transmitted to voltage alarm control module, the voltage-contrast that voltage alarm control module receives later
As a result in, the voltage of voltage and reference voltage terminal when battery charging match if without any operation, battery charges mould
Block continues to run, if voltage when battery charges is greater than the voltage of reference voltage terminal, the battery of voltage control unit transmission at this time fills
The information of electric over-voltage to terminal is executed, then execute terminal receive from voltage control unit charging over-voltage information, and with
The logical signal of itself is compared, and immediately disconnects circuit between battery charging module and battery after meeting over-voltage information；
When battery of electric vehicle electric discharge overvoltage protection, since under normal condition, the voltage rating of zener diode is slightly above electricity
The safe voltage of pond output end, zener diode operate normally, when cell discharge voltage is higher than preset reference voltage terminal voltage
When, zener diode is breakdown, at this time the over-voltage of battery discharge module, later the direct closure switch of switch control module, and simultaneously
The information of battery discharge over-voltage is transmitted to terminal is executed, terminal is executed and circuit between battery discharge module and battery breaks immediately
It opens.
(1) the battery charging of electric vehicle is detected with the second detection terminal by the first detection terminal of setting respectively and is put
When electric whether over-voltage, and by be arranged execution terminal battery of electric vehicle over-voltage is protected, comparing tradition can only be one-sided
Detection charging over-voltage is simultaneously protected or electric discharge over-voltage is simultaneously protected, and leads to this disadvantage of cell damage, and the present invention is by battery charging and discharging
Overvoltage protection collection is integrated, and more has hommization, protects battery of electric vehicle from excessive pressure damages；
(2) by be arranged second detection terminal and execute terminal match, can more quick response electric vehicle electricity
Over-voltage information when tank discharge, and battery of electric vehicle being protected in time, while when comparing traditional battery of electric vehicle electric discharge
Overvoltage protective system formed with less components, and then simple and fast carry out battery overvoltage protection.
Above content is only to structure of the invention example and explanation, affiliated those skilled in the art couple
Described specific embodiment does various modifications or additions or is substituted in a similar manner, without departing from invention
Structure or beyond the scope defined by this claim, is within the scope of protection of the invention.
Claims (7)
1. a kind of battery of electric vehicle overvoltage protective system, which is characterized in that put including battery module, battery charging module, battery
Electric module, reference voltage terminal, the first detection terminal, the second detection terminal and execution terminal, the battery charging module is for controlling
The charging of battery processed, effective object are battery of electric vehicle, and the battery discharge module is used to control the electric discharge of battery, effect
Object is electric vehicle, and the reference voltage terminal is for limiting voltage rating of the battery in charge and discharge, the first detection terminal
Overvoltage protection detection and transmission open command when for battery charging, when the second detection terminal is for battery discharge
Overvoltage protection detection and transmission open command, the terminal that executes are used to receive and execute the disconnection from the first detection terminal
Instruction, simultaneously switches off battery charging module, and the terminal that executes is also used to receive and execute the disconnection from the second detection terminal
Instruction, simultaneously switches off battery discharge module；
The first detection terminal includes voltage acquisition module, voltage comparison module and voltage alarm control module, the voltage
Acquisition module and battery charging module are electrically connected, and the voltage acquisition module is also electrically connected with voltage comparison module, described
Voltage comparison module and reference voltage terminal are electrically connected, and the voltage comparison module also electrically connects with voltage alarm control module
It connects, the voltage acquisition module is used to acquire charging voltage when battery charging, what the voltage comparison module was used to acquire
Charging voltage receive and compare the two with reference voltage, and the voltage alarm control module includes voltage alarm list
Member and voltage control unit, the voltage control unit is for control system ceiling voltage and transmits the information of over-voltage to executing end
End, the voltage alarm unit are used for over voltage alarm when battery charging and discharging；
The second detection terminal includes zener diode, switch control module, and the zener diode and battery module are electrical
Connection, the zener diode are also electrically connected with switch control module, and the switch control module electrically connects with terminal is executed
It connects, the stabistor is for determining whether cell discharge voltage is higher than preset reference voltage terminal voltage, the switch control
Molding block is used to control the circuit switch of zener diode and battery module and the information for being used to transmit battery over-voltage and disconnection refer to
It enables to execution terminal.
2. a kind of battery of electric vehicle overvoltage protective system according to claim 1, which is characterized in that the voltage alarm list
Member is combined aural and visual alarm.
3. a kind of battery of electric vehicle overvoltage protective system according to claim 1, which is characterized in that first detection is eventually
The specific method of end detection battery charging module over-voltage:
The voltage of voltage and reference voltage terminal when S1, voltage acquisition module acquire battery charging, and when battery is charged
The voltage of voltage and reference voltage terminal, which carries out being transmitted to voltage comparison module, to be compared, then comparing result is transmitted to voltage report
Alert control module；
S2, in the voltage-contrast result that voltage alarm control module receives, if voltage and reference voltage terminal when battery charges
Voltage match then without any operation, battery charging module continues to run, if battery charge when voltage be greater than benchmark
The voltage of voltage end, the information of the battery charging over-voltage of voltage control unit transmission at this time is to executing terminal.
4. a kind of battery of electric vehicle overvoltage protective system according to claim 1, which is characterized in that the execution terminal is held
The specific method of row battery charging module over-voltage: executing terminal and receive the information from voltage control unit charging over-voltage, and
It is compared with the logical signal of itself, immediately disconnects circuit between battery charging module and battery after meeting over-voltage information.
5. a kind of battery of electric vehicle overvoltage protective system according to claim 1, which is characterized in that the switch control mould
Block is NPN triode.
6. a kind of battery of electric vehicle overvoltage protective system according to claim 1, which is characterized in that second detection is eventually
The specific method of end detection battery discharge module over-voltage: under normal condition, it is defeated that the voltage rating of zener diode is slightly above battery
The safe voltage of outlet, when cell discharge voltage is higher than preset reference voltage terminal voltage, zener diode is breakdown, at this time
Battery discharge module over-voltage.
7. a kind of battery of electric vehicle overvoltage protective system according to claim 1, which is characterized in that the execution terminal is held
The specific method of row battery discharge module over-voltage: after stabistor is breakdown, the direct closure switch of switch control module, and
The information of battery discharge over-voltage is transmitted simultaneously to terminal is executed, and executes terminal immediately by circuit between battery discharge module and battery
It disconnects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910696243.6A CN110474300A (en) | 2019-07-30 | 2019-07-30 | A kind of battery of electric vehicle overvoltage protective system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910696243.6A CN110474300A (en) | 2019-07-30 | 2019-07-30 | A kind of battery of electric vehicle overvoltage protective system |
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| Publication Number | Publication Date |
|---|---|
| CN110474300A true CN110474300A (en) | 2019-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910696243.6A Pending CN110474300A (en) | 2019-07-30 | 2019-07-30 | A kind of battery of electric vehicle overvoltage protective system |
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| Country | Link |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020097543A1 (en) * | 2001-01-25 | 2002-07-25 | Dialog Semiconductor Gmbh | Charge/discharge protection circuit for a rechargeable battery |
| CN101252286A (en) * | 2007-02-21 | 2008-08-27 | 精工电子有限公司 | Charge-discharge control circuit and charging type power apparatus |
| CN101702514A (en) * | 2009-11-26 | 2010-05-05 | 北京中星微电子有限公司 | Battery protection control device |
| CN103187712A (en) * | 2011-12-27 | 2013-07-03 | 海洋王照明科技股份有限公司 | Battery charge and discharge protection circuit |
| CN206293933U (en) * | 2016-12-29 | 2017-06-30 | 深圳市精捷能电子有限公司 | Battery discharge overvoltage crowbar |
-
2019
- 2019-07-30 CN CN201910696243.6A patent/CN110474300A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020097543A1 (en) * | 2001-01-25 | 2002-07-25 | Dialog Semiconductor Gmbh | Charge/discharge protection circuit for a rechargeable battery |
| CN101252286A (en) * | 2007-02-21 | 2008-08-27 | 精工电子有限公司 | Charge-discharge control circuit and charging type power apparatus |
| CN101702514A (en) * | 2009-11-26 | 2010-05-05 | 北京中星微电子有限公司 | Battery protection control device |
| CN103187712A (en) * | 2011-12-27 | 2013-07-03 | 海洋王照明科技股份有限公司 | Battery charge and discharge protection circuit |
| CN206293933U (en) * | 2016-12-29 | 2017-06-30 | 深圳市精捷能电子有限公司 | Battery discharge overvoltage crowbar |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20211025 Address after: 230000 room 1252, building a, phase II, innovation industrial park, No. 2800, innovation Avenue, high tech Zone, Hefei, Anhui Province Applicant after: Anhui Hengsheng Internet of things Technology Co.,Ltd. Address before: 230001 room 111, building 1, Science Park entrepreneurship center, No. 79, science Avenue, high tech Zone, Hefei, Anhui Province Applicant before: Anhui Yuxin Energy Technology Co.,Ltd. |
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Application publication date: 20191119 |