CN111186319A - Vehicle-mounted end equipment protection device and method for wireless charging system of electric vehicle - Google Patents
Vehicle-mounted end equipment protection device and method for wireless charging system of electric vehicle Download PDFInfo
- Publication number
- CN111186319A CN111186319A CN202010107619.8A CN202010107619A CN111186319A CN 111186319 A CN111186319 A CN 111186319A CN 202010107619 A CN202010107619 A CN 202010107619A CN 111186319 A CN111186319 A CN 111186319A
- Authority
- CN
- China
- Prior art keywords
- wireless charging
- charging system
- vehicle
- end equipment
- control circuit
- 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.)
- Pending
Links
Images
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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods 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
- B60L53/12—Inductive energy transfer
-
- 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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- 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
- Y02T10/72—Electric energy management in electromobility
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a vehicle-mounted end equipment protection device and method of an electric vehicle wireless charging system, and belongs to the technical field of electric vehicle wireless charging and charging safety. The invention comprises a controllable rectifying circuit, a protection control circuit and the like. The controllable rectifying circuit adopts a full-bridge rectifying circuit and comprises four power switching tubes; the protection control circuit judges whether the battery load is suddenly cut off the wireless charging system or not through the detected voltage and current values, then controls the gate-level signal of the power switch tube, and can achieve the effect of isolating the filter capacitor from the wireless charging system when the conduction angle of the gate-level signal is 0. The protection method has the characteristic of rapidness, and when the load shedding condition occurs, the protection can be carried out in time, so that the safety of the vehicle-mounted end equipment is ensured; the protection method has the advantages of low investment cost, high reliability and strong practicability.
Description
Technical Field
The invention discloses a method for protecting vehicle-mounted end equipment of a wireless charging system of an electric vehicle, and belongs to the technical field of wireless charging and charging safety of electric vehicles.
Background
Along with the rapid development of electric automobiles, the wireless charging technology of electric automobiles is applied, when the charging process is abnormal, the BMS can forcibly control the battery to cut off the wireless charging system, at the moment, the system is in a load shedding state, the filter capacitor is still connected with the wireless charging system, the filter capacitor can be continuously charged, and after a long time, the filter capacitor can exceed the safety limit value, so that serious consequences such as fire disasters and explosions can be caused. How to ensure the safety of wireless charging of electric vehicles has become a hot problem for research of experts and scholars at home and abroad. At present, a protection method for a vehicle-mounted end of a wireless charging system generally sends a command of turning off a power supply to a ground end from the vehicle end, and the method needs response time and cannot completely ensure the safety of vehicle-mounted end equipment.
Disclosure of Invention
The invention aims to provide a method for protecting vehicle-mounted end equipment of a wireless charging system of an electric vehicle, aiming at the defects of the background technology, so that the safety of the vehicle-mounted end equipment of the wireless charging system of the electric vehicle is ensured.
The invention adopts the following technical scheme for realizing the aim of the invention:
the utility model provides an on-vehicle end equipment protection device of wireless charging system of electric automobile, includes: a controllable rectification circuit and a protection control circuit; the controllable rectifying circuit is connected to an output port of the secondary compensation network of the wireless charging system and rectifies the high-frequency alternating current to direct current; the protection control circuit is used for judging whether the load shedding condition occurs or not by detecting the charging voltage and the charging current, and when the load shedding occurs, the filter capacitor is isolated from the wireless charging system by controlling a gate-level signal of a power switch tube of the rectifying circuit.
Preferably, the protection control circuit further comprises a wireless communication module 1 connected with the wireless communication module 2 of the power supply in a wireless communication manner, and used for informing the power supply to stop supplying power in a wireless communication manner when the load shedding condition occurs.
Preferably, the controllable rectifying circuit adopts a full-bridge controllable rectifying circuit, the full-bridge controllable rectifying circuit is composed of four power switching tubes S1, S2, S3 and S4, and is used for outputting gate-level signals of the power switching tubes through the protection control circuit, and when the conduction angle of the gate-level signals is 0, the filter capacitor is isolated from the wireless charging system.
Preferably, the protection control circuit is configured to compare the collected charging current with 0, transmit the charging current to the DSP controller, compare the collected charging voltage with a set protection voltage value, transmit the charging voltage to the DSP controller, determine whether to perform protection control according to the obtained signal, and output four paths of signals to the four power switching tubes.
The method for protecting the vehicle-mounted end equipment of the wireless charging system of the electric vehicle by using the vehicle-mounted end equipment protection device of the wireless charging system of the electric vehicle comprises the following steps:
(1) when the electric automobile is normally charged wirelessly, the collected charging current is not 0, the charging voltage is not higher than a set limit value, and the conduction angles of the four power switching tubes S1, S2, S3 and S4 are not 0;
(2) when the load battery is removed from the system, the detected charging current is 0, the charging voltage is continuously increased to the maximum limit value, the conduction angle of a gate-level signal of the power switch tube is controlled to be 0 at the moment, so that the filter capacitor is isolated from the wireless charging system, and meanwhile, the wireless communication module 1 of the protection control circuit informs the power supply source of stopping power supply in a wireless communication mode.
By adopting the technical scheme, the invention has the following beneficial effects: the vehicle-mounted end equipment protection method of the wireless charging system of the electric automobile can ensure safe and reliable wireless charging of the electric automobile; the method can realize the protection of the vehicle-mounted end equipment by only replacing the commonly adopted uncontrolled rectifying circuit with the controllable rectifying circuit and controlling the gate level signal of the power switch tube, and has the advantages of lower input cost, quicker protection action, stronger reliability and stronger practicability.
Drawings
Fig. 1 illustrates a method for protecting a vehicle-mounted device of a wireless charging system of an electric vehicle according to the present invention.
Fig. 2 is a protection control circuit of a vehicle-mounted terminal device of an electric vehicle wireless charging system according to the present invention.
Detailed Description
The method for protecting the vehicle-mounted end equipment of the wireless charging system of the electric vehicle, as shown in fig. 1, includes:
the utility model provides an on-vehicle end equipment protection device of wireless charging system of electric automobile, includes: a controllable rectification circuit and a protection control circuit; the controllable rectifying circuit is connected to an output port of the secondary compensation network of the wireless charging system and rectifies the high-frequency alternating current to direct current; the protection control circuit is used for judging whether the load shedding condition occurs or not by detecting the charging voltage and the charging current, and when the load shedding occurs, the filter capacitor is isolated from the wireless charging system by controlling a gate-level signal of a power switch tube of the rectifying circuit.
In this embodiment, the protection control circuit further includes a wireless communication module 1, connected to the wireless communication module 2 of the power supply in a wireless communication manner, and configured to notify the power supply to stop supplying power in a wireless communication manner when a load shedding situation occurs.
In this embodiment, the controllable rectifying circuit adopts a full-bridge controllable rectifying circuit, which is composed of four power switching tubes S1, S2, S3 and S4, and is used for outputting gate-level signals of the power switching tubes through the protection control circuit, and when the conduction angle of the gate-level signals is 0, the filter capacitor is isolated from the wireless charging system.
In this embodiment, the protection control circuit is configured to compare the collected charging current with 0 and transmit the comparison result to the DSP controller; the collected charging voltage is compared with a set protection voltage value and is transmitted to the DSP controller, the DSP controller judges whether protection control is performed according to the obtained signal, and then the four paths of signals are output to the four power switch tubes.
The method for protecting the vehicle-mounted end equipment of the wireless charging system of the electric vehicle by using the vehicle-mounted end equipment protection device of the wireless charging system of the electric vehicle comprises the following steps:
(1) when the electric automobile is normally charged wirelessly, the collected charging current is not 0, the charging voltage is not higher than a set limit value, and the conduction angles of the four power switching tubes S1, S2, S3 and S4 are not 0;
(2) the voltage formula on the filter capacitor of the vehicle-mounted end equipment of the wireless charging system of the electric vehicle is as follows:
in the formula: m is the mutual inductance between the transmitter coil and the receiver coil, omega is the angular frequency of system operation, RbatThe equivalent resistance of the battery is theta, and the conduction angle of the rectifying circuit is theta;
when the vehicle-mounted battery is removed from the system, the detected charging current is 0, the equivalent impedance of the battery is infinite, if the protection control is not increased, the voltage on the filter capacitor can be known to continuously rise through a voltage formula until the voltage rises to the maximum limit value, and the vehicle-end equipment is burnt. If the conduction angle of the gate-level signal is controlled to be 0, the voltage on the filter capacitor becomes 0, and the effect of isolating the filter capacitor from the wireless charging system is achieved. Meanwhile, the wireless communication module 1 of the protection control circuit informs the power supply source of stopping power supply in a wireless communication mode.
Claims (4)
1. The utility model provides an on-vehicle end equipment protection device of wireless charging system of electric automobile, characterized by includes: a controllable rectification circuit and a protection control circuit; the controllable rectifying circuit is connected to an output port of the secondary compensation network of the wireless charging system and rectifies the high-frequency alternating current to direct current; the protection control circuit is used for judging whether the load shedding condition occurs or not by detecting the charging voltage and the charging current, and when the load shedding occurs, the filter capacitor is isolated from the wireless charging system by controlling a gate-level signal of a power switch tube of the rectifying circuit.
2. The vehicle-mounted end equipment protection device of the wireless charging system of the electric vehicle as claimed in claim 1, wherein the protection control circuit further comprises a wireless communication module 1 connected with a wireless communication module 2 of the power supply in a wireless communication manner, and used for informing the power supply to stop supplying power in a wireless communication manner when a load-shedding condition occurs.
3. The vehicle-mounted terminal equipment protection device of the wireless charging system of the electric vehicle as claimed in claim 1, wherein the controllable rectification circuit is a full-bridge controllable rectification circuit, the full-bridge controllable rectification circuit is composed of four power switching tubes S1, S2, S3 and S4, and is used for outputting gate-level signals of the power switching tubes through the protection control circuit, and when the conduction angle of the gate-level signals is 0, the filter capacitor is isolated from the wireless charging system.
4. A method for protecting the vehicle-mounted end equipment of the wireless charging system of the electric automobile by using the vehicle-mounted end equipment protection device of the wireless charging system of the electric automobile is characterized by comprising the following steps:
(1) when the electric automobile is normally charged wirelessly, the collected charging current is not 0, the charging voltage is not higher than a set limit value, and the conduction angles of the four power switching tubes S1, S2, S3 and S4 are not 0;
(2) when the load battery is removed from the system, the detected charging current is 0, the charging voltage is continuously increased to the maximum limit value, the conduction angle of a gate-level signal of the power switch tube is controlled to be 0 at the moment, so that the filter capacitor is isolated from the wireless charging system, and meanwhile, the wireless communication module 1 of the protection control circuit informs the power supply source of stopping power supply in a wireless communication mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010107619.8A CN111186319A (en) | 2020-02-21 | 2020-02-21 | Vehicle-mounted end equipment protection device and method for wireless charging system of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010107619.8A CN111186319A (en) | 2020-02-21 | 2020-02-21 | Vehicle-mounted end equipment protection device and method for wireless charging system of electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111186319A true CN111186319A (en) | 2020-05-22 |
Family
ID=70705042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010107619.8A Pending CN111186319A (en) | 2020-02-21 | 2020-02-21 | Vehicle-mounted end equipment protection device and method for wireless charging system of electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111186319A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112952969A (en) * | 2021-02-06 | 2021-06-11 | 深圳维普创新科技有限公司 | Method and related device for controlling switch tube of wireless charging module |
| WO2023165060A1 (en) * | 2022-03-04 | 2023-09-07 | 佛山市顺德区美的电子科技有限公司 | Circuit protection method and apparatus, and related device and medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170187230A1 (en) * | 2014-05-30 | 2017-06-29 | Infineon Technologies Austria Ag | Rectification and Regulation Circuit for a Wireless Power Receiver |
| CN108544935A (en) * | 2018-03-20 | 2018-09-18 | 清华大学 | A kind of bidirectional electric automobile wireless charging system transmission power control method |
| CN109591646A (en) * | 2018-12-19 | 2019-04-09 | 国网江苏省电力有限公司 | Vehicle-mounted end parallel connection protection circuit suitable for LCL/LCC topology wireless charging system |
| CN110562061A (en) * | 2019-09-02 | 2019-12-13 | 中兴新能源汽车有限责任公司 | wireless charging vehicle terminal voltage control circuit, method and device and charging equipment |
-
2020
- 2020-02-21 CN CN202010107619.8A patent/CN111186319A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170187230A1 (en) * | 2014-05-30 | 2017-06-29 | Infineon Technologies Austria Ag | Rectification and Regulation Circuit for a Wireless Power Receiver |
| CN108544935A (en) * | 2018-03-20 | 2018-09-18 | 清华大学 | A kind of bidirectional electric automobile wireless charging system transmission power control method |
| CN109591646A (en) * | 2018-12-19 | 2019-04-09 | 国网江苏省电力有限公司 | Vehicle-mounted end parallel connection protection circuit suitable for LCL/LCC topology wireless charging system |
| CN110562061A (en) * | 2019-09-02 | 2019-12-13 | 中兴新能源汽车有限责任公司 | wireless charging vehicle terminal voltage control circuit, method and device and charging equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112952969A (en) * | 2021-02-06 | 2021-06-11 | 深圳维普创新科技有限公司 | Method and related device for controlling switch tube of wireless charging module |
| WO2023165060A1 (en) * | 2022-03-04 | 2023-09-07 | 佛山市顺德区美的电子科技有限公司 | Circuit protection method and apparatus, and related device and medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109591646B (en) | Vehicle-mounted end parallel protection circuit suitable for LCL/LCC topology wireless charging system | |
| CN103879291B (en) | A kind of safety device of vehicle | |
| CN111186319A (en) | Vehicle-mounted end equipment protection device and method for wireless charging system of electric vehicle | |
| WO2016058214A1 (en) | Monitoring and protection apparatus and method for electric field coupling wireless charging system | |
| CN105305660B (en) | A kind of non-contact charge open-circuit protecting device | |
| US10110062B2 (en) | Wireless power transmission device | |
| CN106828181B (en) | Charging control device of electric automobile | |
| CN111284366A (en) | Power battery charging heating circuit, control method thereof and electric automobile | |
| CN103825253B (en) | Battery of electric vehicle safety control and control method | |
| CN109383315B (en) | Mutual inductance estimation method for multi-transmitting-end/single-receiving-end wireless charging system | |
| CN108705952A (en) | A kind of electric vehicle wire and wireless mixed charged system | |
| CN105128679A (en) | Connecting structure and control method of high-voltage electrical apparatus interlocking circuit of pure electric vehicle | |
| CN108695985A (en) | Wireless charging system and its coil offset detection method and device | |
| CN104494539B (en) | A kind of new forms of energy overall height pressurized maintenance switch enclosure | |
| CN108134438A (en) | A kind of wireless charging system for electric automobile | |
| CN104842814A (en) | Double-line redundancy safety high-voltage equipment of light bus and control system and method thereof | |
| CN103746412B (en) | A kind of discharge and recharge interlock circuit of electric automobile | |
| CN104908600A (en) | Safety control system of electric vehicle battery pack | |
| CN105958606A (en) | Electric automobile wireless charging control system | |
| CN203504262U (en) | Complete equipment for automatic wireless charging of electric automobile | |
| CN113270915B (en) | Be suitable for domestic alternating-current charging device of IT electric wire netting | |
| CN205753573U (en) | A kind of electric automobile wireless charging control system | |
| CN103568846A (en) | High-voltage protection system and method for electric vehicle | |
| CN110803042B (en) | Charging bow control circuit and method | |
| CN102904210A (en) | Leakage protection method, leakage protection device and water heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |