CN113328533A - Wireless charging bus capacitor discharge circuit - Google Patents
Wireless charging bus capacitor discharge circuit Download PDFInfo
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- CN113328533A CN113328533A CN202010128032.5A CN202010128032A CN113328533A CN 113328533 A CN113328533 A CN 113328533A CN 202010128032 A CN202010128032 A CN 202010128032A CN 113328533 A CN113328533 A CN 113328533A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 62
- 238000012937 correction Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 2
- 230000006698 induction Effects 0.000 abstract description 2
- 238000011217 control strategy Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Classifications
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- 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
-
- 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
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Rectifiers (AREA)
Abstract
The embodiment of the invention provides a wireless charging bus capacitor discharge circuit, which comprises: the power supply comprises an electric energy transmitting end circuit and an electric energy receiving end circuit which is connected with the electric energy transmitting end circuit in an induction mode; the electric energy receiving end circuit includes: one end of the resistor is connected with one end of the rechargeable battery, and the other end of the resistor is respectively connected with the first rectifying diode and the second rectifying diode; the first rectifier diode and the first switch are provided with a common end, and the second rectifier diode and the second switch are provided with a common end; and the secondary side compensation inductance-capacitance circuit is respectively connected with the common end of the first rectifying diode and the first switch and the common end of the second rectifying diode and the second switch. The circuit of the invention discharges rapidly, does not bring burden to the heat dissipation design of the system due to heat power consumption, and can effectively reduce the loss of the rectifier.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a wireless charging bus capacitor discharging circuit.
Background
In the prior art, as shown in fig. 1, a vehicle-side power supply system mainly includes a wireless charging system 100 including a vehicle-side receiving coil 101 and a vehicle-side power controller 102, a vehicle-mounted charger 200, a vehicle-side direct Current-direct Current (DC-DC) converter 300, a high-voltage battery 400, and a low-voltage battery 500. As shown in fig. 1, the wireless charging system 100 and the vehicle-mounted charger 200 are respectively connected to the high-voltage battery 400 and the vehicle-side DC-DC converter 300, the vehicle-side DC-DC converter 300 is connected to the low-voltage battery 500, the vehicle-mounted charger 200 is connected to the charging port 600, and the vehicle-side DC-DC converter 300 is connected to the low-voltage battery 500; when the wireless charging system is actively/passively turned off, the PFC bus capacitor still stores high voltage and is discharged everywhere. The function overlapping circuit is not reasonably utilized, the arrangement difficulty of the vehicle end is high, the number of connectors is large, the cost is high, the size is large, and the wireless charging system 100 and the vehicle-mounted charger 200 need additional power wiring harnesses, communication wiring harnesses and high-voltage wiring harnesses, so that the wiring difficulty is caused, and the risk of inter-line interference is increased.
Disclosure of Invention
The invention provides a wireless charging bus capacitor discharge circuit and an automobile. The discharge is rapid, the heat dissipation design of the system is not burdened by heat power consumption, and the loss of the rectifier can be effectively reduced.
To solve the above technical problem, an embodiment of the present invention provides the following solutions:
a wireless charging bus capacitance discharge circuit, comprising: the power supply comprises an electric energy transmitting end circuit and an electric energy receiving end circuit which is connected with the electric energy transmitting end circuit in an induction mode;
the electric energy receiving end circuit includes: one end of the resistor is connected with one end of the rechargeable battery, and the other end of the resistor is respectively connected with the first rectifying diode and the second rectifying diode;
the first rectifier diode and the first switch are provided with a common end, and the second rectifier diode and the second switch are provided with a common end;
and the secondary side compensation inductance-capacitance circuit is respectively connected with the common end of the first rectifying diode and the first switch and the common end of the second rectifying diode and the second switch.
Optionally, the secondary side compensation inductor-capacitor circuit includes: the circuit comprises a first inductor, a second inductor, a first capacitor and a second capacitor;
one end of the first inductor is connected with the common end of the first switch, and the other end of the first inductor is respectively connected with the first capacitor and the second capacitor;
one end of the second inductor is connected with the second capacitor, and the other end of the second inductor is connected with the first capacitor and the common end of the second switch respectively.
Optionally, the power transmitting end circuit includes: an AC to DC AC/DC converter; a Power Factor Correction (PFC) circuit connected to the AC/DC converter; a bus capacitor connected in parallel with the PFC circuit;
the third switch and the fourth switch are respectively connected with one end of the bus capacitor;
the third switch and the fifth switch are provided with a common end, and the fourth switch and the sixth switch are provided with a common end;
and a primary side compensation inductance-capacitance circuit connected to a common terminal of the third switch and the fifth switch, and a common terminal of the fourth switch and the sixth switch (Q4), respectively.
Optionally, the primary-side compensation lc circuit includes: a third inductor, a fourth inductor, a third capacitor and a fourth capacitor;
one end of the third inductor is connected with the common end of the third switch and the fifth switch, and the other end of the third inductor is respectively connected with the third capacitor and the fourth capacitor;
one end of the fourth inductor is connected with the common end of the fourth switch and the sixth switch, and the other end of the fourth inductor is connected with the fourth capacitor.
Optionally, the first switch, the second switch, the third switch, the fourth switch, the fifth switch and the sixth switch are all metal oxide semiconductor field effect transistors MOSFETs.
The scheme of the invention at least comprises the following beneficial effects:
in the scheme of the invention, the diode of the secondary side rectifying circuit is replaced by the MOS switching tube. The strategy of bus capacitor active discharge is added, and the control strategy of the rectifier circuit, the filter capacitor and the inductance value are adjusted at the same time. The problem that the PFC capacitor still stores high voltage after the system is closed is effectively solved, and therefore the possibility of repeated startup in a short time is provided. Meanwhile, many safety problems are eliminated, for example, the personal safety of debugging engineers is guaranteed to a great extent.
Drawings
FIG. 1 is a schematic diagram of a prior art vehicle-side power system;
FIG. 2 is a schematic diagram of a wireless charging bus capacitor discharge circuit according to an embodiment of the invention;
description of reference numerals:
q1 to Q4 are four primary side power MOSFETs;
D1-D4 are secondary side rectifier diodes;
l _1 and L _2 are the self-inductance of the transmit and receive coils, respectively;
l _ f1, C _ f1, and C _1 are primary side compensation inductances and capacitances;
l _ f2, C _ f2 and C _2 are secondary side compensation inductance and capacitance;
UAB is a primary side bridge arm voltage;
uab is secondary side bridge arm voltage;
ubat is the voltage across the battery.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 2, an embodiment of the present invention provides a wireless charging bus capacitor discharging circuit, including: an electric energy transmitting end circuit 11, and an electric energy receiving end circuit 12 inductively connected to the electric energy transmitting end circuit 11; the power receiving terminal circuit 12 includes:
a resistor R _ L having one end connected to one end of the rechargeable battery Ubat and the other end connected to the first rectifier diode D3 and the second rectifier diode D4, respectively;
a first switch Q5 and a second switch Q6 respectively connected to the other end of the rechargeable battery Ubat, the first rectifying diode D3 having a common terminal with the first switch Q5, the second rectifying diode D4 having a common terminal with the second switch Q6;
and the secondary side compensation inductance-capacitance circuit 13 is respectively connected with a common terminal of the first rectifying diode D3 and the first switch Q5 and a common terminal of the second rectifying diode D4 and the second switch Q6.
In an alternative embodiment of the present invention, the secondary side compensation lc circuit 13 includes:
a first inductor L _ f2, a second inductor L _2, a first capacitor C _ f2 and a second capacitor C _ 2;
one end of the first inductor L _ f2 is connected to the common terminal of the first switch Q5, and the other end is connected to the first capacitor C _ f2 and the second capacitor C _2, respectively;
one end of the second inductor L _2 is connected to the second capacitor C _2, and the other end is connected to the common terminal of the first capacitor C _ f2 and the second switch Q6, respectively.
In an alternative embodiment of the present invention, the power transmitting-end circuit 11 includes: an AC to DC AC/DC converter; a Power Factor Correction (PFC) circuit connected to the AC/DC converter; a bus capacitor Cbus connected in parallel with the PFC circuit; a third switch Q1 and a fourth switch Q3 respectively connected with one end of the bus capacitor Cbus;
a fifth switch Q2 and a sixth switch Q4 respectively connected to the other end of the bus capacitor Cbus, the third switch Q1 having a common terminal with the fifth switch Q2, the fourth switch Q3 having a common terminal with the sixth switch Q4;
and the primary side compensation inductance-capacitance circuit 10 is respectively connected with the common terminal of the third switch Q1 and the fifth switch Q2 and the common terminal of the fourth switch Q3 and the sixth switch Q4.
In an alternative embodiment of the present invention, the primary-side compensation lc circuit 10 includes: a third inductor L _ f1, a fourth inductor L _1, a third capacitor C _ f1 and a fourth capacitor C _ 1;
one end of the third inductor L _ f1 is connected to the common end of the third switch Q1 and the fifth switch Q2, and the other end is connected to a third capacitor C _ f1 and the fourth capacitor C _1 respectively;
one end of the fourth inductor L _1 is connected to a common end of the fourth switch Q3 and the sixth switch Q4, and the other end is connected to a fourth capacitor C _1, respectively.
Optionally, the first switch Q5, the second switch Q6, the third switch Q1, the fourth switch Q3, the fifth switch Q2 and the sixth switch Q4 are all MOSFET.
In the above embodiment of the present invention, after the system is shut down, the electric quantity stored in the parallel capacitor Cbus at the output end of the PFC has no place to be discharged, as shown in fig. 2, the rectifier circuit at the secondary side is a semi-controlled rectifier circuit.
A rectifier bridge control strategy: when the voltage Ubat at two ends of the battery is smaller than the rated voltage U, Q5 and Q6 are conducted in turn, namely Q5 and D4 in the positive half period of Uab are conducted to charge the Ubat; the Uab negative half-cycle Q6 and D3 are conducted to charge the Ubat, when the Ubat reaches a rated value, the charging is finished, and the output voltage can be regulated by regulating the delay angle alpha.
The discharge strategy of a parallel capacitor Cbu at the PFC output end is as follows: after receiving the shutdown command, the AC/DC and the PWM of the PFC are closed. The energy stored in Cbus is now converted to losses in the resonant tank by alternately switching on Q1, Q4 and Q2, Q3, while simultaneously turning on Q5 and Q6. And when the voltage of the Cbus is lower than the safe voltage, opening Q5 and Q6 to complete the whole shutdown process.
The above embodiment of the invention replaces the diode of the secondary side rectifying circuit with the MOS switch tube. The strategy of bus capacitor active discharge is added, and the control strategy of the rectifier circuit, the filter capacitor and the inductance value are adjusted at the same time. The problem that the PFC capacitor still stores high voltage after the system is closed is effectively solved, and therefore the possibility of repeated startup in a short time is provided. Meanwhile, many safety problems are eliminated, for example, the personal safety of debugging engineers is guaranteed to a great extent.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. A wireless charging bus capacitance discharge circuit, comprising: a power transmitting end circuit (11), and a power receiving end circuit (12) inductively connected to the power transmitting end circuit (11);
the power receiving end circuit (12) includes:
a resistor (R _ L) having one end connected to one end of the rechargeable battery (Ubat) and the other end connected to the first rectifying diode (D3) and the second rectifying diode (D4), respectively;
a first switch (Q5) and a second switch (Q6) respectively connected to the other end of the rechargeable battery (Ubat), the first rectifying diode (D3) having a common terminal with the first switch (Q5), the second rectifying diode (D4) having a common terminal with the second switch (Q6);
and a secondary side compensation inductance-capacitance circuit (13) respectively connected with a common terminal of the first rectifying diode (D3) and the first switch (Q5) and a common terminal of the second rectifying diode (D4) and the second switch (Q6).
2. The wireless charging bus capacitor discharge circuit of claim 1, wherein the secondary side compensation inductor capacitor circuit (13) comprises:
a first inductor (L _ f2), a second inductor (L _2), a first capacitor (C _ f2) and a second capacitor (C _ 2);
one end of the first inductor (L _ f2) is connected with the common end of the first switch (Q5), and the other end of the first inductor is respectively connected with a first capacitor (C _ f2) and the second capacitor (C _ 2);
one end of the second inductor (L _2) is connected with the second capacitor (C _2), and the other end of the second inductor is respectively connected with the common end of the first capacitor (C _ f2) and the second switch (Q6).
3. The wireless charging bus capacitance discharge circuit according to claim 1, wherein the power transmitting end circuit (11) comprises:
an AC to DC AC/DC converter;
a Power Factor Correction (PFC) circuit connected to the AC/DC converter;
a bus capacitance (Cbus) in parallel with the PFC circuit;
a third switch (Q1) and a fourth switch (Q3) respectively connected to one end of the bus capacitor (Cbus);
a fifth switch (Q2) and a sixth switch (Q4) respectively connected to the other end of the bus capacitor (Cbus), the third switch (Q1) having a common terminal with the fifth switch (Q2), the fourth switch (Q3) having a common terminal with the sixth switch (Q4);
and a primary side compensation inductance-capacitance circuit (10) respectively connected with a common terminal of the third switch (Q1) and the fifth switch (Q2) and a common terminal of the fourth switch (Q3) and the sixth switch (Q4).
4. The wireless charging bus capacitor discharge circuit of claim 3, wherein the primary side compensation inductor capacitor circuit (10) comprises:
a third inductor (L _ f1), a fourth inductor (L _1), a third capacitor (C _ f1), and a fourth capacitor (C _ 1);
one end of the third inductor (L _ f1) is connected with the common end of the third switch (Q1) and the fifth switch (Q2), and the other end is respectively connected with a third capacitor (C _ f1) and the fourth capacitor (C _ 1);
one end of the fourth inductor (L _1) is connected with the common end of the fourth switch (Q3) and the sixth switch (Q4), and the other end of the fourth inductor is respectively connected with a fourth capacitor (C _ 1).
5. The wireless charging bus capacitor discharge circuit of claim 3, wherein the first switch (Q5), the second switch (Q6), the third switch (Q1), the fourth switch (Q3), the fifth switch (Q2), and the sixth switch (Q4) are all MOSFET's.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010128032.5A CN113328533A (en) | 2020-02-28 | 2020-02-28 | Wireless charging bus capacitor discharge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010128032.5A CN113328533A (en) | 2020-02-28 | 2020-02-28 | Wireless charging bus capacitor discharge circuit |
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| Publication Number | Publication Date |
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| CN113328533A true CN113328533A (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010128032.5A Pending CN113328533A (en) | 2020-02-28 | 2020-02-28 | Wireless charging bus capacitor discharge circuit |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203660621U (en) * | 2013-12-12 | 2014-06-18 | 北汽福田汽车股份有限公司 | Main circuit topological structure applied to wireless charger of electric vehicle |
| US20180323633A1 (en) * | 2017-05-04 | 2018-11-08 | Beijing Sigma Microelectronics Co., Ltd | Reception device for wireless charging and terminal device |
| CN108923503A (en) * | 2018-09-07 | 2018-11-30 | 中国计量大学 | A kind of high efficiency wireless charging device based on half-controlled rectifier circuit |
| CN110103736A (en) * | 2018-01-19 | 2019-08-09 | 乐金电子研发中心(上海)有限公司 | A kind of wireless power transmission system based on electric car |
| CN110277921A (en) * | 2019-05-07 | 2019-09-24 | 江苏大学 | A kind of dynamic radio charging system efficiency optimization method |
-
2020
- 2020-02-28 CN CN202010128032.5A patent/CN113328533A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203660621U (en) * | 2013-12-12 | 2014-06-18 | 北汽福田汽车股份有限公司 | Main circuit topological structure applied to wireless charger of electric vehicle |
| US20180323633A1 (en) * | 2017-05-04 | 2018-11-08 | Beijing Sigma Microelectronics Co., Ltd | Reception device for wireless charging and terminal device |
| CN110103736A (en) * | 2018-01-19 | 2019-08-09 | 乐金电子研发中心(上海)有限公司 | A kind of wireless power transmission system based on electric car |
| CN108923503A (en) * | 2018-09-07 | 2018-11-30 | 中国计量大学 | A kind of high efficiency wireless charging device based on half-controlled rectifier circuit |
| CN110277921A (en) * | 2019-05-07 | 2019-09-24 | 江苏大学 | A kind of dynamic radio charging system efficiency optimization method |
Non-Patent Citations (1)
| Title |
|---|
| 徐志聪等: "基于接收端可控整流的无线电能传输功率调节***", 《机电一体化》 * |
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Application publication date: 20210831 |
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