CN106560972B - Communication system and wireless car charging device - Google Patents
Communication system and wireless car charging device Download PDFInfo
- Publication number
- CN106560972B CN106560972B CN201610969541.4A CN201610969541A CN106560972B CN 106560972 B CN106560972 B CN 106560972B CN 201610969541 A CN201610969541 A CN 201610969541A CN 106560972 B CN106560972 B CN 106560972B
- Authority
- CN
- China
- Prior art keywords
- primary
- primary side
- circuit
- secondary side
- coil
- 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.)
- Active
Links
- 238000004891 communication Methods 0.000 title claims abstract description 55
- 238000004804 winding Methods 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 230000001934 delay Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- H02J7/025—
-
- 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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a communication system and an automobile wireless charging device, wherein the communication system comprises a primary side converter positioned at a foundation side and a secondary side converter positioned at a vehicle-mounted side, the communication system comprises a primary side coil, a primary side antenna and a primary side controller positioned at the foundation side, and the automobile wireless charging system also comprises a secondary side coil, a secondary side antenna and a secondary side controller positioned at the vehicle-mounted side; primary and secondary windings, voltage or current transmitted; the voltage or current transmitted between the primary coil and the secondary coil comprises zero crossing point information; the primary side controller detects a zero crossing point of voltage or current in the primary side converter, and transmits or receives a digital signal through a primary side antenna when the zero crossing point is detected; and the secondary side controller detects a zero crossing point of the voltage or the current in the secondary side converter, and transmits or receives a digital signal through the secondary side antenna when the zero crossing point is detected. The technical scheme of the invention improves the stability of the communication system.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a communication system and a wireless automobile charging device applying the same.
Background
At present, the automobile charging mainly adopts two modes of wired charging and wireless charging. The wireless charging omits frequent contact between the electric automobile and a charging power supply, reduces manual operation links, simplifies charging steps and reduces charging cost, so that the wireless charging device is widely applied.
The wireless charging system of the automobile comprises a basic building side part and a vehicle-mounted side part, wherein the basic building side part is generally provided with a primary side wireless communication device, the vehicle-mounted side part is generally provided with a secondary side wireless communication device, communication is carried out through a single channel formed by the primary side wireless communication device and the secondary side wireless communication device, and in a high-power charging occasion, the communication is easy to interfere, so that charging faults are caused.
Disclosure of Invention
The main object of the present invention is to provide a communication system, which aims to improve the stability of the communication system.
In order to achieve the above object, the present invention provides a communication system applied to an automobile wireless charging device, the automobile wireless charging device comprises a foundation side and a vehicle-mounted side, the foundation side comprises a primary side converter, the vehicle-mounted side comprises a secondary side converter, the communication system comprises a primary side coil, a primary side antenna and a primary side controller which are positioned on the foundation side, and the communication system further comprises a secondary side coil, a secondary side antenna and a secondary side controller which are positioned on the vehicle-mounted side;
the primary coil and the secondary coil, the transmitted voltage or current; the voltage or current transmitted between the primary coil and the secondary coil comprises zero crossing point information;
the primary side controller detects a zero crossing point of voltage or current in the primary side converter, and transmits or receives a digital signal through the primary side antenna when the zero crossing point is detected; the secondary side controller detects zero crossing points of voltage or current in the secondary side converter, and transmits or receives digital signals through the secondary side antenna when the zero crossing points are detected.
Preferably, the primary side converter is respectively connected with the primary side coil and the primary side controller, and the secondary side converter is respectively connected with the secondary side coil and the secondary side controller; the primary side controller is connected with the primary side antenna, and the secondary side controller is connected with the secondary side antenna
Preferably, the frequency of the zero crossing information of the voltage or current is less than or equal to twice the frequency of the digital signal.
Preferably, the primary side controller comprises a primary side control circuit and a primary side modulation-demodulation circuit, and the secondary side controller comprises a secondary side control circuit and a secondary side modulation-demodulation circuit;
the primary side control circuit is electrically connected with the primary side antenna through the primary side modulation and demodulation circuit; the secondary side control circuit is electrically connected with the secondary side antenna through the secondary side modulation and demodulation circuit.
Preferably, the primary coil and the secondary coil form a first signal channel, and the primary antenna and the secondary antenna form a second signal channel;
when the primary side control circuit or the secondary side control circuit detects zero crossing point information of voltage or current, the primary side control circuit or the secondary side control circuit delays for a preset time and then sends digital signals through a second signal channel.
Preferably, when the primary side control circuit or the secondary side control circuit detects zero crossing information of the voltage or the current, the primary side control circuit or the secondary side control circuit receives the digital signal through the second signal channel after delaying for a preset time.
Preferably, the preset time is less than 1/4 of the period of the transmission voltage or current between the primary coil and the secondary coil. .
Preferably, when the primary side control circuit detects zero crossing information of voltage or current and detects a start bit of a digital signal, the primary side control circuit delays for a preset time and then starts a primary side modulation and demodulation circuit to demodulate the signal;
and when the secondary side control circuit detects zero crossing point information of voltage or current and detects a start bit of a digital signal, the secondary side control circuit delays for a preset time and then starts the secondary side modulation and demodulation circuit to demodulate the signal.
The invention also provides an automobile wireless charging device, which comprises a primary side converter positioned at a foundation side, a secondary side converter positioned at a vehicle-mounted side and the communication system;
the primary side controller is used for controlling the primary side converter to convert electric energy and then transmitting the electric energy to the secondary side converter through the primary side coil and the secondary side coil; and the secondary side controller controls the secondary side converter to convert the electric energy again and then charge the load.
Preferably, the primary side converter comprises a primary side rectifying circuit, a voltage regulating circuit, an inverter circuit and a primary side compensating circuit, and the secondary side converter comprises a secondary side rectifying circuit and a secondary side compensating circuit;
the first input end and the second input end of the primary side rectifying circuit are connected with the mains supply, and the first output end and the second output end of the primary side rectifying circuit are respectively connected with the first input end and the second input end of the voltage regulating circuit; the first output end and the second output end of the voltage regulating circuit are respectively connected with the first input end and the second input end of the inverter circuit; the first output end and the second output end of the inverter circuit are respectively connected with the first input end and the second input end of the primary side compensation circuit, and the first output end and the second output end of the primary side compensation circuit are respectively connected with the first end and the second end of the primary side coil; the acquisition end of the primary side compensation circuit is connected with the primary side controller, and the primary side controller is also electrically connected with the antenna;
the secondary coil is electromagnetically coupled with the primary coil, a first end and a second end of the secondary coil are respectively connected with a first input end and a second input end of the secondary compensation circuit, and a first output end and a second output end of the secondary compensation circuit are respectively connected with a first input end and a second input end of the secondary rectification circuit; the first output end and the second output end of the secondary side rectifying circuit are connected with the battery; the acquisition end of the secondary side compensation circuit is connected with the secondary side controller, and the secondary side controller is also electrically connected with the antenna;
the control end of the primary side controller is respectively connected with the controlled end of the primary side rectifying circuit, the controlled end of the voltage regulating circuit and the controlled end of the inverter circuit; and the control end of the secondary side controller is connected with the controlled end of the secondary side rectifying circuit.
The technical scheme of the invention forms a communication system by arranging the primary coil, the primary antenna, the primary controller, the secondary coil, the secondary antenna and the secondary controller. The primary coil and the secondary coil are coupled, and the communication system transmits zero crossing point information of voltage or current through the primary coil and the secondary coil. In the state that the digital signal is transmitted from the infrastructure side to the vehicle-mounted side, the primary side controller transmits the digital signal through the primary side antenna when detecting the zero crossing point of the voltage or the current, and the secondary side controller starts to receive the digital signal through the secondary side antenna after detecting the zero crossing point of the voltage or the current; similarly, in a state in which the vehicle-mounted side transmits digital signals to the infrastructure side, the secondary side controller transmits digital signals through the secondary side antenna when detecting a voltage or a current zero crossing point, and the primary side controller receives digital signals through the primary side antenna after detecting the current or the voltage zero crossing point. Compared with the traditional single signal channel, the technical scheme of the invention transmits voltage or current through the primary coil and the secondary coil, wherein the transmitted voltage or current contains zero crossing point information, digital signals are transmitted by the primary antenna and the secondary antenna for communication, and the signals are received or transmitted when the zero crossing point occurs, so that the interference to communication under the high-power charging working condition is effectively reduced, and the anti-interference capability of system communication is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a functional block diagram of an embodiment of a communication system according to the present invention;
FIG. 2 is a functional block diagram of a further embodiment of the communication system of the present invention;
FIG. 3 is a schematic diagram of a first embodiment of a communication waveform of the communication system of the present invention;
FIG. 4 is a schematic diagram of a second embodiment of a communication waveform of the communication system of the present invention;
FIG. 5 is a schematic diagram of a third embodiment of a communication waveform of the communication system of the present invention;
FIG. 6 is a schematic diagram of a primary side compensation circuit according to a first embodiment of the present invention;
FIG. 7 is a schematic diagram of a second embodiment of a primary side compensation circuit according to the present invention;
fig. 8 is a schematic diagram of a third embodiment of a primary side compensation circuit according to the present invention.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a communication system which is applied to an automobile wireless charging device, and the automobile wireless charging device comprises a primary side converter 100 and a secondary side converter 200.
Referring to fig. 1 and 2, in the embodiment of the present invention, the communication system includes a primary coil Lp, a primary antenna 400 and a primary controller 300 on the infrastructure side, and the wireless charging system for an automobile further includes a secondary coil Ls, a secondary antenna 600 and a secondary controller 500 on the vehicle side.
The primary coil Lp and the secondary coil Ls, the transmitted voltage or current; the voltage or current transmitted between the primary coil Lp and the secondary coil Ls comprises zero crossing point information of the voltage or current; the primary side controller 300 detects a zero crossing point of the voltage or current in the primary side converter 100, and transmits or receives a digital signal through the primary side antenna 400 when the zero crossing point is detected; the secondary side controller 500 detects zero crossing points of the voltage or current in the secondary side converter 200, and transmits or receives a digital signal through the secondary side antenna 600 when the zero crossing points are detected.
The communication system comprises a first signal path (not shown) arranged between the primary winding Lp and the secondary winding Ls and a second signal path (not shown); the second signal path is disposed between the primary antenna 400 and the secondary antenna 600.
The primary coil Lp and the secondary coil Ls are respectively a primary winding and a secondary winding of a loosely coupled transformer of the wireless charging device of the automobile, and are mutually coupled to transmit primary electric energy to the secondary to charge a battery of the electric automobile. In the technical scheme of the invention, zero crossing point information of voltage or current transmitted by the primary coil Lp and the secondary coil Ls is also utilized.
The primary coil Lp, the primary antenna 400, the primary controller 300, the secondary coil Ls, the secondary antenna 600 and the secondary controller 500 are arranged to form a communication system. The communication system transmits zero crossing information of voltage or current through the primary coil Lp and the secondary coil Ls. In a state where the digital signal is transmitted to the vehicle-mounted side from the infrastructure side, the primary side controller 300 transmits the digital signal through the primary side antenna 400 when the zero crossing point of the voltage or the current is detected, and the secondary side controller 500 starts to receive the digital signal through the secondary side antenna 600 after the zero crossing point of the voltage or the current is detected; similarly, in a state where the vehicle-mounted side transmits a digital signal to the infrastructure side, the secondary side controller 500 transmits a digital signal through the secondary side antenna 600 when a voltage or a current zero crossing point is detected, and the primary side controller 300 receives a digital signal through the primary side antenna 400 after a current or a voltage zero crossing point is detected. Compared with the traditional single signal channel, the technical scheme of the invention transmits voltage or current through the primary coil Lp and the secondary coil Ls, wherein the transmitted voltage or current contains zero crossing point information, digital signals are transmitted by the primary antenna and the secondary antenna for communication, the signals are jointly transmitted, and the signals are received or transmitted when the zero crossing point occurs, so that the interference to communication under the high-power charging working condition is effectively reduced, and the anti-interference capability of system communication is improved.
Specifically, the primary inverter 100 is connected to the primary coil and the primary controller, respectively, and the secondary inverter is connected to the secondary coil and the secondary controller, respectively; the primary side controller is connected with the primary side antenna, and the secondary side controller is connected with the secondary side antenna.
The first signal path of the communication system transmits a strong electrical signal including zero crossing information of the voltage or current of the primary side converter 100; the communication system second signal path transmits weak electric signals including digital signals output from the primary side controller 300 or from the secondary side controller 500.
It should be noted that, the signal path formed between the primary winding Lp and the secondary winding Ls is used for transmitting a strong electric signal, including zero crossing information of the voltage or the current in the primary converter 100, and real-time analog signals such as a voltage value, a current value, a frequency, and the like of the primary converter 100. And the primary antenna 400 and the secondary antenna 600 are used to transmit digital signals containing modulation information.
Further, when the primary side controller 300 or the secondary side controller 500 detects zero crossing information of the voltage or the current, the transmitting digital signal is transmitted through the second signal channel.
In the embodiment of the present invention, the zero crossing signal is used as a synchronization signal, that is, when the primary side controller 300 or the secondary side controller 500 detects the zero crossing point of the voltage or the current, the primary side controller 300 transmits a digital signal through the primary side antenna 400, and at the same time, the secondary side controller 500 starts to receive the signal through the secondary side antenna 600; or secondary side transmitting signals and primary side receiving signals. By starting signal transmission at the zero crossing point of the alternating current, the interference of the power circuit in the primary side converter 100 or the secondary side converter 200 on communication is greatly reduced, and the stability of communication is improved.
Further, the frequency of the strong electrical signal is less than or equal to twice the frequency of the weak electrical signal.
It should be noted that, the strong electric signal frequency fs and the actual modulation signal frequency fb satisfy fb less than or equal to 2×fs, when fb=2×fs, the corresponding duration time of each bit of the digital signal is half cycle, and each zero crossing point is a synchronous signal; when fb=fs, each bit of the digital signal corresponds to the entire cycle of duration, and every zero crossing is a synchronous signal. It is recommended to use fs=n×fb (n is greater than 1 and n is a positive integer), and the duration of each bit is fixed after the relationship between fs and fb is determined.
Further, the primary side controller 300 includes a primary side control circuit 310 and a primary side modem circuit 320, and the secondary side controller 500 includes a secondary side control circuit 510 and a secondary side modem circuit 520; the primary side control circuit 310 is electrically connected to the primary side antenna 400 via the primary side modem circuit 320; the secondary side control circuit 510 is electrically connected to the secondary side antenna 600 via the secondary side modem circuit 520.
In this embodiment, one end of the transmitting signal is referred to as a transmitting end, and one end of the receiving signal is a receiving end.
Referring to fig. 3, the primary modem circuit 320 or the secondary modem circuit 520 is configured to modulate a signal, for example, information to be transmitted by the primary modem circuit 320 is modulated and then wirelessly transmitted to the secondary antenna 600 through the primary antenna 400, and the secondary modem circuit 520 demodulates the received signal to complete communication.
From top to bottom in fig. 3 to 5, the zero crossing information waveform of the voltage or the current at the transmitting end, the digital signal waveform at the transmitting end, the zero crossing information waveform of the voltage or the current received by the receiving end and the digital signal waveform are sequentially shown. t1, t2, t3, t4, t5, t6 are zero crossing times of the zero signal waveform.
Referring to fig. 4, further, when the primary side control circuit 310 or the secondary side control circuit 510 detects zero crossing information of the voltage or the current, the primary side control circuit 310 or the secondary side control circuit 510 delays for a preset time and then receives the digital signal through the second signal channel. That is, after the transmitting end starts to transmit the digital signal, when the primary side control circuit 310 or the secondary side control circuit 510 of the receiving end detects the zero crossing information of the voltage or the current, the transmitting end receives the periodic digital signal after delaying for a preset time. In this embodiment, the preset time is less than 1/4 of the period of the voltage or current transmitted between the primary coil and the secondary coil.
Referring to fig. 5, further, when the primary side control circuit 310 or the secondary side control circuit 510 detects zero crossing information of the voltage or the current, the primary side control circuit 310 or the secondary side control circuit 510 delays for a preset time and then sends a digital signal through the second signal channel.
The delay preset time can ensure that the receiving end can start the demodulation circuit to demodulate signals at the zero crossing point when the transmitting end transmits data at a high speed, so that the interference from a wireless charging system is minimum.
With continued reference to fig. 5, further, when the primary side control circuit 310 detects zero crossing information of the voltage or the current and detects a start bit of the digital signal, the primary side control circuit 310 delays for a preset time and then starts the primary side modem circuit 320 to demodulate the signal; when the secondary side control circuit 510 detects zero crossing information of the voltage or the current and detects the start bit of the digital signal, the secondary side control circuit 510 delays for a preset time and then starts the secondary side modem circuit 520 to demodulate the signal.
The digital signal containing the modulation information is cyclically transmitted in a periodic manner, and is not finished until the receiving end finishes receiving. The digital signal in each period includes a start bit, and when the receiving end detects the zero crossing information of the voltage or the current and detects the start bit of the digital signal, the corresponding primary side or secondary side modem circuit 520 is turned on to start receiving the signal. Thus, the interference of the line charging system to communication can be further reduced, and the performance requirement of a subsequent processing circuit is reduced, so that the cost is reduced.
The process of modulating and demodulating the signal in the second signal channel will be described in the example, and in this embodiment, it is assumed that the infrastructure side is a signal transmitting end, and the vehicle side is a signal receiving end. The infrastructure side outputs 10101 five-bit binary information, which converts 1 into a signal with Frequency f1 and 0 into a signal with Frequency f2 by means of FSK (Frequency-shift keying) modulation.
The vehicle-mounted side captures the current zero crossing point information transmitted through the first signal channel, and then the secondary side modem circuit 520 works after a preset time delay, so that the secondary side modem circuit 520 can start to work near the zero crossing point, and the interference of the main power circuit is greatly reduced. If the secondary side modem 520 does not demodulate the 0 or 1 information, it indicates that the infrastructure side does not send information, and the detection is continued; if the secondary side modem 520 demodulates 0 or 1 information, it indicates that the information transmitted from the infrastructure side is received. The zero crossing point is added with the previous delay time as the starting time of the bit information, and the information is demodulated in the appointed bit time range, if the demodulated information is consistent, for example, all 1 or all 0, the demodulated information is clear. If the demodulated information contains 0 and 1 due to interference, the method can actually judge according to the principle that the duration time of the two is longer, so that the demodulated information is possibly wrong, but the method can judge through the application layer verification of the transmitting end and the receiving end, and if the verification is wrong, the data can be repeatedly transmitted.
The construction side captures the zero crossing point of the output current of the inverter circuit, and at the same time as capturing the zero crossing point, the primary side controller 300 converts the information 1 into a signal with the frequency f1 through the modulation circuit and transmits the signal,
according to the designated bit length, the base side detects the next zero crossing information after the designated bit length, and the primary side controller 300 converts 0 into a signal with frequency f2 through the modem circuit and sends the signal out, and the vehicle side judges the starting time of the next bit information according to the starting time of the last bit, the bit length and the next zero crossing. The vehicle-mounted side repeats the above steps to demodulate 0.
This is repeated so that the transmission of the five-bit binary information to be output 10101 is completed.
The invention also provides an automobile wireless charging device, which comprises a primary side converter 100 positioned on a foundation side, a secondary side converter 200 positioned on a vehicle side and the communication system;
the primary side controller 300 controls the primary side converter 100 to convert the electric energy and transmit the converted electric energy to the secondary side converter 200 through the primary side coil Lp and the secondary side coil Ls; the secondary side controller 500 controls the secondary side converter 200 to convert the electric energy again and then charge the load.
Specifically, the primary side converter 100 includes a primary side rectifying circuit 110, a voltage regulating circuit 120, an inverter circuit 130, and a primary side compensating circuit 140, and the secondary side converter 200 includes a secondary side rectifying circuit 220 and a secondary side compensating circuit 210;
the first input end and the second input end of the primary side rectifying circuit 110 are connected to the mains supply, and the first output end and the second output end of the primary side rectifying circuit 110 are respectively connected to the first input end and the second input end of the voltage regulating circuit 120; the first output end and the second output end of the voltage regulating circuit 120 are respectively connected with the first input end and the second input end of the inverter circuit 130; the first output end and the second output end of the inverter circuit 130 are respectively connected with the first input end and the second input end of the primary side compensation circuit 140, and the first output end and the second output end of the primary side compensation circuit 140 are respectively connected with the first end and the second end of the primary side coil Lp; the acquisition end of the primary side compensation circuit 140 is connected with the primary side controller 300, and the primary side controller 300 is also electrically connected with an antenna;
the secondary coil Ls is electromagnetically coupled to the primary coil Lp, a first end and a second end of the secondary coil Ls are respectively connected to a first input end and a second input end of the secondary compensation circuit 210, and a first output end and a second output end of the secondary compensation circuit 210 are respectively connected to a first input end and a second input end of the secondary rectification circuit 220; the first output end and the second output end of the secondary side rectifying circuit 220 are both connected with a battery; the collection end of the secondary side compensation circuit 210 is connected with the secondary side controller 500, and the secondary side controller 500 is also electrically connected with an antenna;
the control end of the primary side controller 300 is connected with the controlled end of the primary side rectifying circuit 110, the controlled end of the voltage regulating circuit 120 and the controlled end of the inverter circuit 130 respectively; the control terminal of the secondary side controller 500 is connected to the controlled terminal of the secondary side rectifying circuit 220.
It should be noted that, the wireless charging system of the automobile is a non-contact inductive power transmission system, and leakage inductance in the system affects active power transmitted by the system. In this embodiment, the active power of the system is increased by the compensation circuit.
Referring to fig. 6 to 8, the compensation circuit includes three embodiments as follows:
in a first embodiment, the compensation circuit includes a first capacitor, wherein a first end of the first capacitor is connected to the first output end of the inverter circuit 130, and a second end of the first capacitor is connected to the first end of the primary winding Lp.
In a second embodiment, the compensation circuit includes a first capacitor connected in parallel between the first end and the second end of the primary winding Lp.
In a third embodiment, the compensation circuit includes a first capacitor, a second capacitor, and a first inductor; the first end of the first inductor is connected to the output end of the first end of the inverter circuit 130, the second end of the first inductor is connected to the first end of the primary coil Lp through the first capacitor, and the second capacitor is connected to the two ends of the primary coil Lp in parallel.
It should be noted that, the current structure of the secondary side compensation circuit is the same as the circuit structure of the primary side compensation circuit, and the specific circuit structure is referred to the primary side compensation circuit.
Further, the wireless charging system for an automobile further includes a battery manager 700, wherein a first input end and a second input end of the battery manager 700 are respectively connected with a first output end and a second output end of the secondary side rectifying circuit 220, and both the first output end and the second output end of the battery manager 700 are connected with the power battery.
The battery manager 700, i.e., BMS (Battery Management System ) detects and manages the amount of electricity, voltage, and current of the battery. The battery manager 700 increases the level of automation of the overall automotive wireless charging system.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (8)
1. The communication system is applied to an automobile wireless charging device, and comprises a foundation side and a vehicle-mounted side, wherein the foundation side comprises a primary side converter, and the vehicle-mounted side comprises a secondary side converter; the primary coil and the secondary coil are respectively a primary winding and a secondary winding of a loosely-coupled transformer of the automobile wireless charging device; wherein,,
the voltage or current transmitted between the primary coil and the secondary coil comprises zero crossing point information;
the primary side controller detects a zero crossing point of voltage or current in the primary side converter, and transmits or receives a digital signal through the primary side antenna when the zero crossing point is detected; the secondary side controller detects a zero crossing point of voltage or current in the secondary side converter, and transmits or receives a digital signal through the secondary side antenna when the zero crossing point is detected;
the primary side controller comprises a primary side control circuit and a primary side modulation-demodulation circuit, and the secondary side controller comprises a secondary side control circuit and a secondary side modulation-demodulation circuit; the primary side control circuit is electrically connected with the primary side antenna through the primary side modulation and demodulation circuit; the secondary side control circuit is electrically connected with the secondary side antenna through the secondary side modulation and demodulation circuit;
the primary coil and the secondary coil are formed with a first signal channel, and the primary antenna and the secondary antenna are formed with a second signal channel;
when the primary side control circuit or the secondary side control circuit detects zero crossing point information of voltage or current, the primary side control circuit or the secondary side control circuit delays for a preset time and then sends digital signals through a second signal channel.
2. The communication system of claim 1, wherein the primary inverter is connected to the primary coil and the primary controller, respectively, and the secondary inverter is connected to the secondary coil and the secondary controller, respectively; the primary side controller is connected with the primary side antenna, and the secondary side controller is connected with the secondary side antenna.
3. A communication system according to any one of claims 1, wherein the frequency of the zero crossing information of the voltage or current is less than or equal to twice the frequency of the digital signal.
4. The communication system of claim 1, wherein the primary side control circuit or the secondary side control circuit receives the digital signal through the second signal channel after a predetermined time delay when the primary side control circuit or the secondary side control circuit detects zero crossing information of the voltage or the current.
5. A communication system as claimed in claim 1 or 4, wherein the predetermined time is less than 1/4 of the period of transmission voltage or current between the primary and secondary coils.
6. The communication system of claim 5, wherein when the primary side control circuit detects zero crossing information of voltage or current and detects a start bit of a digital signal, the primary side control circuit delays for a preset time and then starts a primary side modem circuit to demodulate the signal;
and when the secondary side control circuit detects zero crossing point information of voltage or current and detects a start bit of a digital signal, the secondary side control circuit delays for a preset time and then starts the secondary side modulation and demodulation circuit to demodulate the signal.
7. A wireless charging device for an automobile, comprising a primary side converter on a capital side, a secondary side converter on a vehicular side, and a communication system according to any one of claims 1 to 6;
the primary side controller is used for controlling the primary side converter to convert electric energy and then transmitting the electric energy to the secondary side converter through the primary side coil and the secondary side coil; and the secondary side controller controls the secondary side converter to convert the electric energy again and then charge the load.
8. The wireless charging device of claim 7, wherein the primary side converter comprises a primary side rectifying circuit, a voltage regulating circuit, an inverter circuit, and a primary side compensation circuit, and the secondary side converter comprises a secondary side rectifying circuit and a secondary side compensation circuit;
the first input end and the second input end of the primary side rectifying circuit are connected with the mains supply, and the first output end and the second output end of the primary side rectifying circuit are respectively connected with the first input end and the second input end of the voltage regulating circuit; the first output end and the second output end of the voltage regulating circuit are respectively connected with the first input end and the second input end of the inverter circuit; the first output end and the second output end of the inverter circuit are respectively connected with the first input end and the second input end of the primary side compensation circuit, and the first output end and the second output end of the primary side compensation circuit are respectively connected with the first end and the second end of the primary side coil; the acquisition end of the primary side compensation circuit is connected with the primary side controller, and the primary side controller is also electrically connected with the antenna;
the secondary coil is electromagnetically coupled with the primary coil, a first end and a second end of the secondary coil are respectively connected with a first input end and a second input end of the secondary compensation circuit, and a first output end and a second output end of the secondary compensation circuit are respectively connected with a first input end and a second input end of the secondary rectification circuit; the first output end and the second output end of the secondary side rectifying circuit are connected with the battery; the acquisition end of the secondary side compensation circuit is connected with the secondary side controller, and the secondary side controller is also electrically connected with the antenna;
the control end of the primary side controller is respectively connected with the controlled end of the primary side rectifying circuit, the controlled end of the voltage regulating circuit and the controlled end of the inverter circuit; and the control end of the secondary side controller is connected with the controlled end of the secondary side rectifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610969541.4A CN106560972B (en) | 2016-10-28 | 2016-10-28 | Communication system and wireless car charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610969541.4A CN106560972B (en) | 2016-10-28 | 2016-10-28 | Communication system and wireless car charging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106560972A CN106560972A (en) | 2017-04-12 |
| CN106560972B true CN106560972B (en) | 2023-07-28 |
Family
ID=58485774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610969541.4A Active CN106560972B (en) | 2016-10-28 | 2016-10-28 | Communication system and wireless car charging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106560972B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106981931B (en) * | 2017-05-17 | 2020-01-14 | 中国科学院电工研究所 | Non-contact induction power supply device of primary coil of three-phase structure |
| CN108237943B (en) * | 2018-01-17 | 2019-05-17 | 深圳威迈斯新能源股份有限公司 | A kind of dual output port charging circuit and its control method |
| CN108539873B (en) * | 2018-06-14 | 2023-12-19 | 吉成无线（深圳）有限公司 | Gas and liquid transmission butt joint control device with wireless power supply mode |
| CN114946115A (en) | 2020-01-07 | 2022-08-26 | Oppo广东移动通信有限公司 | Charger and control method |
| CN111146951B (en) * | 2020-01-20 | 2021-08-17 | 特变电工西安电气科技有限公司 | Power electronic transformer capable of being started in two directions and control method thereof |
| CN112637818B (en) * | 2020-12-09 | 2023-06-20 | 中兴新能源科技有限公司 | Wireless charging communication connection method, device and communication system |
| CN113022336B (en) * | 2021-05-11 | 2024-03-12 | 江苏方天电力技术有限公司 | Wireless charging processing method, system, circuit, electric automobile and charging pile |
| CN114132189B (en) * | 2021-10-15 | 2023-04-11 | 深圳职业技术学院 | High-power multi-port wireless charging pile for electric automobile |
| CN115447409B (en) * | 2022-08-10 | 2024-06-21 | 广西电网有限责任公司电力科学研究院 | Wireless charging automobile secondary side voltage feedback system based on additional coupling channel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315698A (en) * | 2011-08-30 | 2012-01-11 | 杭州矽力杰半导体技术有限公司 | Magnetic field coupling-type non-contact electric energy transmission device |
| CN103166329A (en) * | 2013-03-04 | 2013-06-19 | 重庆大学 | Bifurcation frequency transmission control circuit and control method in IPT system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6422963B2 (en) * | 2013-07-17 | 2018-11-14 | コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． | Wireless inductive power supply |
| CN103944243B (en) * | 2014-02-27 | 2016-05-11 | 北京航空航天大学 | A kind of induction type non-contact charging device with accurate alignment function used for electric vehicle |
| JP6446194B2 (en) * | 2014-07-17 | 2018-12-26 | ローム株式会社 | Wireless power receiving apparatus, receiver circuit thereof, and method for controlling wireless power receiving apparatus |
| US20170324283A1 (en) * | 2014-11-13 | 2017-11-09 | Powerbyproxi Limited | Ipt communication system for dynamic pairing |
| CN205646954U (en) * | 2016-03-21 | 2016-10-12 | 中兴新能源汽车有限责任公司 | Wireless charging receiving device , electric automobile and wireless charging system |
| CN206542234U (en) * | 2016-10-28 | 2017-10-03 | 中兴新能源汽车有限责任公司 | Communication system and wireless automobile charging device |
-
2016
- 2016-10-28 CN CN201610969541.4A patent/CN106560972B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315698A (en) * | 2011-08-30 | 2012-01-11 | 杭州矽力杰半导体技术有限公司 | Magnetic field coupling-type non-contact electric energy transmission device |
| CN103166329A (en) * | 2013-03-04 | 2013-06-19 | 重庆大学 | Bifurcation frequency transmission control circuit and control method in IPT system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106560972A (en) | 2017-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106560972B (en) | Communication system and wireless car charging device | |
| CN106560974B (en) | Wireless charging system and wireless charging device for automobile | |
| Huang et al. | Simultaneous wireless power/data transfer for electric vehicle charging | |
| EP2685601B1 (en) | Wireless power transfer method, apparatus and system | |
| KR20230114238A (en) | Wireless power transmitter | |
| CN105007249B (en) | Wireless energy and signal synchronous transmission system and method based on 2FSK | |
| CN111731139B (en) | Wireless charging receiving end, transmitting end, system, control method and electric automobile | |
| US10601249B2 (en) | Wireless power transmitter and receiver | |
| US11038433B2 (en) | Phase alignment circuit and method of receive end, and receive end | |
| US11070088B2 (en) | Wireless power transfer | |
| CN107612159A (en) | A kind of PWM that has concurrently controls the single-shot with frequency modulation control to penetrate to four receiving coil electric automobile static state wireless power supply systems | |
| CN103280868A (en) | Bidirectional charging device | |
| CN110311439A (en) | A kind of wireless charging method based on wireless energy transfer system | |
| JP2023534340A (en) | Charging method and system for unmanned aircraft having identity recognition function by reverse conversion | |
| CN113022336A (en) | Wireless charging processing method, system and circuit, electric automobile and charging pile | |
| CN103972996B (en) | The method of energy and information bidirectional wireless transmission | |
| CN206542234U (en) | Communication system and wireless automobile charging device | |
| CN211320996U (en) | Wireless charging transmitting terminal device and related system | |
| US20210162875A1 (en) | A power transfer system for electric vehicles and a control method thereof | |
| CN204633803U (en) | 2FSK-based wireless energy and signal synchronous transmission circuit | |
| CN206611244U (en) | Wireless charging system and automobile wireless charging device | |
| CN203674772U (en) | Multi-load non-contact charging device and system for electric vehicle | |
| CN105162224A (en) | Wireless electric bicycle charging pile | |
| CN109818431A (en) | A kind of wireless charging method based on carrier communication | |
| CN116729147A (en) | Electric automobile wireless charging system for ID authentication based on PDM characteristic wave |
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 | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190711 Address after: 441000 Building No. 6, International Innovation Industry Base, 49 Dengcheng Avenue, Xiangyang High-tech Zone, Xiangfan City, Hubei Province Applicant after: ZTEV Corp. Address before: 441000 Building No. 6, International Innovation Industry Base, 49 Dengcheng Avenue, Xiangyang High-tech Zone, Xiangfan City, Hubei Province Applicant before: ZTEV Corp. Applicant before: SHENZHEN CITY ZHONGXING NEW ENERGY AUTOMOBILE TECHNOLOGY CO.,LTD. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |