CN110518706A - A kind of wireless charging device and its protection circuit - Google Patents

A kind of wireless charging device and its protection circuit Download PDF

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Publication number
CN110518706A
CN110518706A CN201910733303.7A CN201910733303A CN110518706A CN 110518706 A CN110518706 A CN 110518706A CN 201910733303 A CN201910733303 A CN 201910733303A CN 110518706 A CN110518706 A CN 110518706A
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CN
China
Prior art keywords
module
voltage
receiving
connect
output
Prior art date
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Pending
Application number
CN201910733303.7A
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Chinese (zh)
Inventor
李波
徐想清
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Zhi Chain Physical Technology Co Ltd
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Shenzhen Zhi Chain Physical Technology Co Ltd
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Priority to CN201910733303.7A priority Critical patent/CN110518706A/en
Publication of CN110518706A publication Critical patent/CN110518706A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12Inductive energy transfer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60Monitoring or controlling charging stations
    • B60L53/62Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031Circuit 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
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/12Electric charging stations
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/14Plug-in electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The present invention relates to electronic technology fields; provide a kind of wireless charging device and its protection circuit; wireless charging device includes wireless power transmitting terminal and wireless power receiving end; wireless power transmitting terminal includes the first control module and power supply module; wireless power receiving end includes the second control module and receiving module; the voltage output end of receiving module and load connect; first control module and the second control module wireless communication connect, and protection circuit includes voltage detection module, voltage comparison module and short block;The input terminal of voltage detection module with the voltage output end of receiving module for connecting, the output end of voltage detection module and the first input end of voltage comparison module connect, second input terminal of voltage comparison module inputs comparison voltage threshold value, and the output end of the voltage comparison module is connect with short block.So that wireless power receiving module is constantly in short-circuit condition by short block when there is over-voltage exception, realizes the decoupling of wireless power receiving module and load.

Description

A kind of wireless charging device and its protection circuit
Technical field
The invention belongs to electronic technology field more particularly to a kind of wireless charging device and its protection circuits.
Background technique
The charger to charge for electric car and electric bicycle batteries operates mainly in constant current section.In non-contact charge Under mode, energy transmitting end (primary side system) and energy acceptance end (secondary edge system) needs to pass through nothing while transmitting energy Line communicates to interact data, and then forms the closed-loop control of entire wireless charging system.The energy of wireless charging system connects Receiving end is generally integrated on electrical equipment or battery, and the restrictive conditions such as volume, heat dissipation, cost determine setting for energy acceptance end Meter high power density, low cost and high reliability as far as possible.At present in most of wireless charging products, energy acceptance end is only Secondary coil is contained, three major parts of compensation network and high-frequency rectification, under the conditions of constant current output, load cannot open a way, Otherwise output voltage will rapidly rise, so that the work of energy receiving end is in short-circuit condition.Since data transmission delay and system are rung The reasons such as speed are answered, energy transmitting end can not be relied solely on and adjust output power to realize that total system is protected.
To guarantee charging safety, idling consumption, the secondary controller of wireless charging system and the control electricity of relay are reduced It is generally derived from high-pressure side, rather than provides vulnerabilities scan power supply by electrical equipment.It carves at the beginning, output relay disconnects, former Edge system injects micro-energy, and secondary edges generating line voltage activates secondary controller after increasing, former pair side realizes that communication is shaken hands, interaction number According to.Output relay is opened after shaking hands successfully, into charging flow, primary side increases input power, realizes function by wireless telecommunications The closed-loop control of rate output.After secondary side output voltage or electric current are higher than protection threshold value, by short-circuiting device by high voltage bus and ground Short circuit is realized and decouples battery and non-contact charger.However DC bus-bar voltage is down to 0V after short circuit decoupling, can not be secondary side Controller and short-circuiting device power supply, therefore excessively high output voltage can still damage load (battery pack) and charging equipment.
In conclusion step voltage is increased and then is damaged after wireless charging device will cause under the open circuit situations such as load at present The problem of battery group and charging equipment.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of wireless charging device and its protection circuits, it is intended to solve current Wireless charging mode increases and then damages battery group and charging equipment there are will cause rear step voltage in the case of load open circuit Problem.
First aspect of the embodiment of the present invention provides a kind of protection circuit, is applied to wireless charging device, the wireless charging Electric equipment includes wireless power transmitting terminal and wireless power receiving end, the wireless power transmitting terminal include the first control module and Power supply module, the wireless power receiving end include the second control module and receiving module, the voltage output of the receiving module For connecting with load, first control module and second control module wireless communication are connected at end;
The protection circuit includes voltage detection module, voltage comparison module and short block;
The input terminal of the voltage detection module with the voltage output end of the receiving module for connecting, the voltage inspection The output end for surveying module is connect with the first input end of the voltage comparison module, the second input terminal input of voltage comparison module The output end of comparison voltage threshold value, the voltage comparison module is connect with short block;
The voltage detection module is exported for detecting receiving module to the output voltage of load;
The voltage comparison module is for the output voltage to be compared with comparison voltage threshold value, when the output electricity When pressure is beyond the comparison voltage threshold value, output control level to the short block;
The short block is used for the constant conduction when receiving the control level, makes the receiving module short circuit.
Second aspect of the embodiment of the present invention provides a kind of wireless charging device, and the wireless charging device includes wireless function Rate transmitting terminal, protection with the wireless power receiving end of wireless power transmitting terminal wireless connection and as described in relation to the first aspect Circuit, the protection circuit are connect with the wireless power receiving end.
Wireless charging device provided in an embodiment of the present invention and its protection circuit, by leading to when over-voltage exception occurs in load Crossing short block makes wireless power receiving module be constantly in short-circuit condition, realizes the solution of wireless power receiving module and load Coupling is unable to maintain that short-circuiting device is powered after avoiding the second control module power loss, after short-circuit decoupled state continues for some time, wirelessly Power sending module can stop powering, and be effectively protected load and wireless charging device, solve current wireless charging device negative It will cause the problem of rear step voltage increases and then damages battery group and charging equipment under the open circuit situations such as load.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these Attached drawing obtains other attached drawings.
Fig. 1 is the structural schematic diagram for the protection circuit that the embodiment of the present invention one provides;
Fig. 2 is the exemplary circuit schematic diagram for the protection circuit that the embodiment of the present invention one provides;
The structural schematic diagram of the position Fig. 3 wireless charging device provided by Embodiment 2 of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right 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.
It should be noted that term " includes " and their any changes in description and claims of this specification Shape, it is intended that cover and non-exclusive include.Such as system, product or the equipment comprising a series of units are not limited to arrange Unit out, but optionally further comprising the step of not listing or unit, or optionally further comprising for these products or set Standby intrinsic other units.In addition, term " first ", " second " and " third " etc. be for distinguishing different objects, not for Particular order is described.
The embodiment of the present invention is in order to solve current wireless charging device step voltage after load etc. will cause under open circuit situations It increases and then damages battery group and the problem of charging equipment, provide a kind of wireless charging device and its protection circuit, pass through Protection circuit makes wireless power receiving module be constantly in short-circuit condition when over-voltage exception occurs in load by short block, real The decoupling of existing wireless power receiving module and load is unable to maintain that short-circuiting device is powered after avoiding the second control module power loss, short After road decoupled state continues for some time, wireless power sending module can stop powering, and be effectively protected load and wireless charging Device.
In order to illustrate above-mentioned wireless charging device and its protection circuit, carried out specifically below in conjunction with specific embodiment It is bright:
Embodiment one:
The structure that Fig. 1 shows the protection circuit of the offer of the embodiment of the present invention one illustrates only and this for ease of description The relevant part of inventive embodiments, details are as follows:
Referring to Fig. 1, a kind of protection circuit 100 provided in an embodiment of the present invention, be applied to wireless charging device, for The wireless power receiving end of wireless charging device connects.Above-mentioned wireless charging device includes wireless power transmitting terminal 200 and wireless Power receiving end 300, wireless power transmitting terminal 200 include the first control module 210 and power supply module 220, and wireless power receives End 300 includes the second control module 310 and receiving module 320, and the output end of receiving module 320 is used for and load (battery packet) Connection, the first control module 210 and the second control 220 modules wireless communication connect.
Protecting circuit 100 includes voltage detection module 110, voltage comparison module 120 and short block 130.
The input terminal of voltage detection module 110 with the voltage output end of receiving module 320 for connecting, voltage detection module 110 output end is connect with the first input end of voltage comparison module 120, the second input terminal input of voltage comparison module 120 The output end of comparison voltage threshold value, voltage comparison module 120 is connect with short block 130.
Voltage detection module 110 is used to detect the output voltage of the output of receiving module 320 to load.
Voltage comparison module 120 is for the output voltage to be compared with comparison voltage threshold value, when output voltage is super Out when comparison voltage threshold value, output control level to short block 130.
Short block 130 is used for the constant conduction when receiving control level, keeps receiving module 320 short-circuit.
In a particular application, above-mentioned first control module 210 and the second control module 310 can pass through Infrared Wireless Communication Mode realizes communication connection, can also be realized and be communicated to connect by bluetooth, without restriction herein.
In a particular application, electric energy is transmitted to above-mentioned reception mould by resonant mode electromagnetic induction by above-mentioned power supply module 220 Block 320, the voltage output end output voltage by receiving module 320 charge to battery packet to (battery packet) is loaded.
In a particular application, when there is over-voltage exception, the voltage of the first input end of voltage comparison module 120 can be higher than Comparison voltage threshold value, voltage comparison module 120 will export control level to short block 130 at this time.Above-mentioned over-voltage is wrapped extremely Include mistake caused by wireless power receiving end opens a way (load open circuit) in abnormal cases, causes load to become smaller due to poor contact The raised exception of output voltage of the voltage output end of receiving module caused by reduce off-flavor is normal and other reasons, is not limited herein System.It should be noted that since wireless power receiving end works in constant current state, in its load open circuit or poor contact, meeting The output voltage VDD of the voltage output end of receiving module is caused to increase, i.e. the first input end of input voltage comparison module 120 Voltage can increase.
In a particular application, the second control module 310 of wireless power receiving end 300 is by the voltage of receiving module 320 The working power that the output voltage VDD of output end is obtained after power-switching circuit carries out power supply conversion, working power 5V/ The DC power supply of 3.3V.
As an embodiment of the present embodiment, above-mentioned protection circuit further includes power module, above-mentioned power module Input terminal for connecting with the voltage output end of receiving module, control with voltage comparator and second respectively by the output end of power module The connection of molding block.
In a particular application, the voltage received by electric power source pair of module obtains 5V working power after carrying out DC/DC decompression, And 5V working power is input to the second control module, operating voltage is provided for the second control module.And it generates preset Comparison voltage threshold value, and the comparison voltage threshold value is input to the second input terminal of voltage comparison unit, as reference voltage into Row voltage compares.
As an embodiment of the present embodiment, above-mentioned power module includes pressure unit and voltage conversion unit;Drop Press the input terminal of unit for the input terminal of power module, the output end of pressure unit and the input terminal of voltage conversion unit connect, First output end of voltage conversion unit is connect with second control module, the output end of voltage conversion unit and the voltage Comparison module connection.
As shown in Fig. 2, as an embodiment of the present invention, Fig. 2 shows the exemplary circuits of the protection circuit 100 of the present embodiment Schematic diagram.
Referring to Fig. 2, in a particular application, above-mentioned voltage comparison module includes that voltage compares as a kind of implementation Device U1.The first end of voltage comparator U1 is the first input end of voltage comparison module, and the second end of voltage comparator U1 is electricity The second input terminal of comparison module is pressed, the third end of voltage comparator U1 is the output end of voltage comparison module.
In a particular application, above-mentioned short block includes thyristor Q1, and the first end of above-mentioned thyristor Q1 is compared with voltage Module connection, the second end of thyristor Q1 and the voltage output end of receiving module connect, the third end ground connection of thyristor Q1.
Above-mentioned current foldback circuit is described further below in conjunction with working principle and Fig. 2:
When the abnormal conditions such as poor contact, open circuit occurs during the charging process in battery group, since wireless power receives Hold work under constant current mode, be followed by load (battery group) open circuit (or poor contact) will cause receiving module voltage it is defeated The output voltage VDD of outlet is increased, and the output voltage that voltage detection module 110 detects increases, and the output electricity that will test Pressure is input to voltage comparator U1 and is compared with comparison voltage threshold value, when output voltage is higher than comparison voltage threshold value, voltage Above-mentioned thyristor Q1 is connected in comparator U1 output high level, after thyristor Q1 conducting, so that wireless power receiving end Short circuit, the voltage of DC bus is reduced to 0 at this time, so that the second control module 310 powers off.However wireless power transmitting terminal The voltage of input is not reduced, due to the constant-current characteristics of system, other than turn on thyristors moment causes biggish dash current, The current value for flowing through thyristor remains steady state, according to thyristor characteristics, as long as having follow current to flow through nothing after conducting On state is maintained by how trigger voltage changes thyristor, therefore thyristor remains on state.Due to bus electricity Pressure is 0 (i.e. output voltage is 0), therefore 310 power loss of the second module does not work, and interrupts the channel radio with the first control module 210 News connection, when the first control module 210 of wireless power transmitting terminal detects the communicating interrupt of itself and the second control module 310 When, it will judge communication abnormality occur and then stop powering.By simply protecting circuit to realize the overvoltage protection of pure hardware, and The protection circuit has high reliability, and the protection circuit of the low wireless charging device provided in this embodiment of cost of implementation is occurring So that wireless power receiving module is constantly in short-circuit condition by short block when over-voltage exception, realizes wireless power receiving module With the decoupling of load.It is unable to maintain that short-circuiting device is powered after avoiding the second control module power loss, continues one section in short-circuit decoupled state After time, wireless power sending module can stop powering, and be effectively protected load and wireless charging device.
Protection circuit provided in this embodiment, by making wireless power by short block when over-voltage exception occurs in load Receiving module is constantly in short-circuit condition, realizes the decoupling of wireless power receiving module and load, and the second control module is avoided to lose It is unable to maintain that short-circuiting device is powered after electricity, after short-circuit decoupled state continues for some time, wireless power sending module can stop supplying Electricity is effectively protected load and wireless charging device, and solve current wireless charging device will cause under the open circuit situations such as load The problem of step voltage increases and then damages battery group and charging equipment afterwards.
Embodiment two:
Wireless charging device 10 provided by Embodiment 2 of the present invention.Above-mentioned wireless charging device 10 is sent including wireless power Guarantor described in end 200, the wireless power receiving end 300 being wirelessly connected with the wireless power transmitting terminal 200 and embodiment one Protection circuit 100.
In a particular application, wireless power transmitting terminal 200 includes the first control module 210 and power supply module 220, and power connects Receiving module 300 includes the second control module 310 and receiving module 320, and the voltage output end of receiving module 320 is used to connect with load It connects, the first control module 210 and the second control module 310 communicate to connect;Protection circuit 100 is connect with receiving module 320.
In a particular application, above-mentioned first control module 210 and the second control module 310 can pass through Infrared Wireless Communication Mode realizes communication connection, can also be realized and be communicated to connect by bluetooth, without restriction herein.
In a particular application, electric energy is transmitted to above-mentioned reception mould by resonant mode electromagnetic induction by above-mentioned power supply module 220 Block 320, the voltage output end output voltage by receiving module 320 charge to battery packet to (battery packet) is loaded.
In a particular application, above-mentioned receiving module 320 includes receiving unit 321 and rectification output unit 322.
Receiving unit 321 and power supply module 220 are wirelessly connected, and receiving unit 321 is connect with rectification output unit 322, whole The output end for flowing output unit 322 is the voltage output end of receiving module 320.
In a particular application, above-mentioned receiving unit 321 includes receiving coil.Power supply module is received by above-mentioned receiving coil The wireless power of output.
In a particular application, above-mentioned rectification output unit 322 includes rectifier.Above-mentioned receiving coil is connect by rectifier The wireless power received generates output voltage after carrying out rectifying and wave-filtering and exports to load.
It should be noted that wireless charging device provided in an embodiment of the present invention, as real with method shown in Fig. 1 of the present invention It applies example and is based on same design, bring technical effect is identical as embodiment of the method shown in Fig. 1 of the present invention, and particular content can be found in Narration in embodiment of the method shown in Fig. 1 of the present invention, details are not described herein again.
Therefore, wireless charging device provided in this embodiment equally can pass through short circuit when over-voltage exception occurs in load Module makes wireless power receiving module be constantly in short-circuit condition, realizes the decoupling of wireless power receiving module and load, avoids It is unable to maintain that short-circuiting device is powered after second control module power loss, after short-circuit decoupled state continues for some time, wireless power hair It send module that can stop powering, is effectively protected load and wireless charging device, solve current wireless charging device and opened in load etc. It will cause the problem of rear step voltage increases and then damages battery group and charging equipment in the case of road.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.

Claims (10)

1. a kind of protection circuit, which is characterized in that be applied to wireless charging device, the wireless charging device includes wireless power Transmitting terminal and wireless power receiving end, the wireless power transmitting terminal includes the first control module and power supply module, described wireless Power receiving end includes the second control module and receiving module, and the voltage output end of the receiving module is used to connect with load, First control module and second control module wireless communication connect;
The protection circuit includes voltage detection module, voltage comparison module and short block;
The input terminal of the voltage detection module with the voltage output end of the receiving module for connecting, the voltage detecting mould The output end of block is connect with the first input end of the voltage comparison module, and the second input terminal input of voltage comparison module is compared The output end of voltage threshold, the voltage comparison module is connect with short block;
The voltage detection module is exported for detecting receiving module to the output voltage of load;
The voltage comparison module is for the output voltage to be compared with comparison voltage threshold value, when the output voltage is super Out when the comparison voltage threshold value, output control level to the short block;
The short block is used for the constant conduction when receiving the control level, makes the receiving module short circuit.
2. protection circuit according to claim 1, which is characterized in that the protection circuit further includes power module;
The input terminal of the power module with the voltage output end of the receiving module for connecting, the output of the power module End is connect with voltage comparison module, and the output end of the power module is also used to connect with second control module.
3. protection circuit according to claim 2, which is characterized in that the power module includes that pressure unit and voltage turn Change unit;
The input terminal of the pressure unit is the input terminal of the power module, the output end of the pressure unit and the voltage The input terminal of converting unit connects, and the first output end of the voltage conversion unit is connect with second control module, described The output end of voltage conversion unit is connect with the voltage comparison module.
4. protection circuit according to claim 1, which is characterized in that the voltage comparison module includes voltage comparator;
The first end of the voltage comparator be the voltage comparison module first input end, the second of the voltage comparator End is the second input terminal of the voltage comparison module, and the third end of the voltage comparator is the defeated of the voltage comparison module Outlet.
5. protection circuit according to claim 1, which is characterized in that the short block includes thyristor;
The first end of the thyristor is connect with the voltage comparison module, the second end of the thyristor and the receiving module Voltage output end connection, the thyristor third end ground connection.
6. a kind of wireless charging device, which is characterized in that the wireless charging device includes wireless power transmitting terminal and the nothing The wireless power receiving end and the protection circuit as described in claim 1 to 5 any one that linear heat generation rate transmitting terminal is wirelessly connected, The protection circuit is connect with the wireless power receiving end.
7. wireless charging device according to claim 6, which is characterized in that the wireless power transmitting terminal includes the first control Module and power supply module, the power receiving module include the second control module and receiving module, the voltage of the receiving module Output end is used to connect with load, and first control module and second control module communicate to connect;The protection circuit It is connect with the receiving module.
8. wireless charging device according to claim 7, which is characterized in that the receiving module includes receiving unit and whole Flow output unit;
The receiving unit and power supply module are wirelessly connected, and the receiving unit is connect with the rectification output unit, described whole The output end for flowing output unit is the voltage output end of the receiving module.
9. wireless charging device according to claim 8, which is characterized in that the receiving unit includes receiving coil.
10. wireless charging device according to claim 8, which is characterized in that the rectification output unit includes rectifier.
CN201910733303.7A 2019-08-09 2019-08-09 A kind of wireless charging device and its protection circuit Pending CN110518706A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112564298A (en) * 2020-11-10 2021-03-26 上海万暨电子科技有限公司 Circuit protection system and method and LCC type wireless charging system
CN113472047A (en) * 2021-07-21 2021-10-01 Tcl通讯(宁波)有限公司 Charging interface over-temperature protection circuit and terminal equipment
CN114362381A (en) * 2021-12-13 2022-04-15 上海南芯半导体科技股份有限公司 Overvoltage protection device for wireless charging system and control method thereof

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201985596U (en) * 2011-04-28 2011-09-21 奇瑞汽车股份有限公司 Wireless charging system for electric automobile
CN105305660A (en) * 2015-11-12 2016-02-03 中国科学院电工研究所 Noncontact charging open circuit protection device
US20160254659A1 (en) * 2015-02-26 2016-09-01 Ut-Battelle, Llc Overvoltage protection system for wireless power transfer systems
CN106451700A (en) * 2016-10-26 2017-02-22 中惠创智无线供电技术有限公司 Circuit protection device and wireless charging system
CN106571665A (en) * 2016-04-06 2017-04-19 中兴新能源汽车有限责任公司 Wireless charging reception device, electric automobile and wireless charging system
CN107093883A (en) * 2017-06-27 2017-08-25 青岛鲁渝能源科技有限公司 Protection circuit, radio energy transmission system and excessively stream/short-circuit protection method
CN107591859A (en) * 2017-09-22 2018-01-16 中惠创智无线供电技术有限公司 A kind of wireless charging receives controller guard method and device
US20180241249A1 (en) * 2017-02-22 2018-08-23 Qualcomm Incorporated Over voltage protection detection
CN210693566U (en) * 2019-08-09 2020-06-05 深圳智链物联科技有限公司 Wireless charging equipment and protection circuit thereof

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201985596U (en) * 2011-04-28 2011-09-21 奇瑞汽车股份有限公司 Wireless charging system for electric automobile
US20160254659A1 (en) * 2015-02-26 2016-09-01 Ut-Battelle, Llc Overvoltage protection system for wireless power transfer systems
CN105305660A (en) * 2015-11-12 2016-02-03 中国科学院电工研究所 Noncontact charging open circuit protection device
CN106571665A (en) * 2016-04-06 2017-04-19 中兴新能源汽车有限责任公司 Wireless charging reception device, electric automobile and wireless charging system
CN106451700A (en) * 2016-10-26 2017-02-22 中惠创智无线供电技术有限公司 Circuit protection device and wireless charging system
US20180241249A1 (en) * 2017-02-22 2018-08-23 Qualcomm Incorporated Over voltage protection detection
CN107093883A (en) * 2017-06-27 2017-08-25 青岛鲁渝能源科技有限公司 Protection circuit, radio energy transmission system and excessively stream/short-circuit protection method
CN107591859A (en) * 2017-09-22 2018-01-16 中惠创智无线供电技术有限公司 A kind of wireless charging receives controller guard method and device
CN210693566U (en) * 2019-08-09 2020-06-05 深圳智链物联科技有限公司 Wireless charging equipment and protection circuit thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112564298A (en) * 2020-11-10 2021-03-26 上海万暨电子科技有限公司 Circuit protection system and method and LCC type wireless charging system
CN113472047A (en) * 2021-07-21 2021-10-01 Tcl通讯(宁波)有限公司 Charging interface over-temperature protection circuit and terminal equipment
CN113472047B (en) * 2021-07-21 2023-12-12 Tcl通讯(宁波)有限公司 Over-temperature protection circuit for charging interface and terminal equipment
CN114362381A (en) * 2021-12-13 2022-04-15 上海南芯半导体科技股份有限公司 Overvoltage protection device for wireless charging system and control method thereof
CN114362381B (en) * 2021-12-13 2024-04-12 上海南芯半导体科技股份有限公司 Overvoltage protection device for wireless charging system and control method thereof

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