CN211684682U - Carrier communication type wireless charging device for electric automobile - Google Patents

Carrier communication type wireless charging device for electric automobile Download PDF

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CN211684682U
CN211684682U CN201921262080.2U CN201921262080U CN211684682U CN 211684682 U CN211684682 U CN 211684682U CN 201921262080 U CN201921262080 U CN 201921262080U CN 211684682 U CN211684682 U CN 211684682U
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inductor
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switching tube
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陈小宇
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Jiangsu Jiuyu Electronic Technology Co ltd
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Jiangsu Jiuyu Electronic Technology Co ltd
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    • 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
    • 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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

Abstract

The utility model relates to a carrier communication type wireless charging device for an electric automobile, which comprises a primary charging loop and a secondary charging loop, wherein the input end of the primary charging loop is communicated with a power grid, and the output end of the secondary charging loop is communicated with a battery; the transmitting end of the primary side charging loop corresponds to the receiving end of the secondary side charging loop; the primary side charging loop is provided with an inverter sub-loop and a first carrier signal communication sub-loop, and the first carrier signal communication sub-loop is positioned on one side of the inverter sub-loop, which is close to a power grid; the secondary charging loop is provided with a rectifying sub-loop and a second carrier signal communication sub-loop, and the second carrier signal communication sub-loop is positioned on one side of the rectifying sub-loop, which is close to the battery. The utility model discloses a carrier communication breaks away from the reliance to WIFI or ZIGBEE, and the security is higher, and only need reequip the carrier signal communication that can realize former secondary to current wireless charging device of electric automobile, need not to make whole charging device again.

Description

Carrier communication type wireless charging device for electric automobile
Technical Field
The utility model relates to a carrier communication formula wireless charging device that electric automobile used belongs to wireless charging technical field.
Background
According to the knowledge of the inventor, the rapid development of the electric automobile puts higher requirements on charging facilities, no matter a direct current pile or an alternating current pile, the power transmission of the electric automobile utilizes a traditional wired cable, the size, price and weight of the cable are unbearable in a high-power occasion, the wireless charging technology (WPT) energy is transmitted through a non-contact long distance, the application occasion of electric energy transmission is greatly expanded, and the electric automobile is an energy transmission mode with a wide development prospect. While wireless charging technology brings convenience, new problems are also introduced: the traditional primary and secondary communication mode is to carry out information interaction through WIFI or ZIGBEE, so that a communication receiving module needs to be added, the cost is increased, and the related information safety problem is also brought.
At present, a typical wireless charging architecture is shown in fig. 1, a system primary side gets power from a Grid side (Grid), performs rectification through PFC (power factor correction), then performs primary DC/AC inversion, then transmits through a transmitting coil and is received by a receiving coil, and then converts high-frequency alternating current into direct current to charge a battery (Bat) through IMN and AC/DC in sequence; the secondary side sends the collected current and voltage data through a WIFI or ZIGBEE signal modulator, the primary side reads the output voltage and current value, the receiving power of the user side is calculated, and meanwhile the user side participates in closed-loop control.
The structure circuit can well solve the problem of real-time communication of the original secondary side, so that the original secondary side can be physically decoupled. However, a broadcasting mechanism is adopted by the WIFI or ZIGBEE module, so that the possibility that information is intercepted and invaded exists, user data may be illegally acquired, and more seriously, if output information is tampered, the automobile may be burnt out by changing output voltage and current, which is a great potential safety hazard for users.
In addition, WIFI or ZIGBEE communication signal itself is comparatively fragile, and wireless charging system EMI (electromagnetic interference) is comparatively abominable, and WIFI or ZIGBEE signal is disturbed very easily, in case receive the back of disturbing, will influence output waveform quality certainly.
Through retrieval, Chinese invention patents with patent numbers of CN201710055435.X and application publication number of CN106787265A disclose a wireless charging device, wherein the transmitting device comprises a transmitting end resonance circuit, a transmitting end signal processing circuit and a transmitting end single chip microcomputer; the transmitting end resonant circuit is also used for transmitting an instruction signal and receiving a response signal; the transmitting end signal processing circuit demodulates the received response signal to obtain an original response signal; the transmitting end single chip microcomputer also modulates the PWM carrier signal output by the transmitting end single chip microcomputer according to the original instruction signal; the receiving device comprises a receiving end resonant circuit, a receiving end signal processing circuit and a receiving end single chip microcomputer; the receiving end resonance circuit is also used for receiving the instruction signal and transmitting the response signal; the receiving end signal processing circuit demodulates the received instruction signal to obtain an original instruction signal; and the receiving end singlechip also modulates the PWM carrier signal output by the receiving end singlechip according to the original response signal. However, this solution requires the whole device to be manufactured again, and cannot be realized by modifying the existing wireless charging device for electric vehicles.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at: to the problems in the prior art, the carrier communication type wireless charging device for the electric automobile is provided, dependence on WIFI or ZIGBEE is eliminated, safety is higher, carrier signal communication of an original secondary side can be achieved only by modifying the existing wireless charging device for the electric automobile, and the whole charging device does not need to be manufactured again.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
a carrier communication type wireless charging device for an electric automobile comprises a primary side charging loop and a secondary side charging loop, wherein the input end of the primary side charging loop is communicated with a power grid, and the output end of the secondary side charging loop is communicated with a battery; the transmitting end of the primary side charging loop corresponds to the receiving end of the secondary side charging loop; the primary side charging loop is provided with an inverter sub-loop and a first carrier signal communication sub-loop, and the first carrier signal communication sub-loop is positioned on one side of the inverter sub-loop, which is close to a power grid; the secondary charging loop is provided with a rectifying sub-loop and a second carrier signal communication sub-loop, and the second carrier signal communication sub-loop is positioned on one side of the rectifying sub-loop, which is close to the battery; the system is characterized in that the first carrier signal communication sub-loop and the second carrier signal communication sub-loop have the same structure and respectively consist of a coupling transformer, an input-output conversion circuit, an optical coupling isolation circuit and a DSP (digital signal processor), wherein a controlled end of the input-output conversion circuit and a controlled end of the optical coupling isolation circuit are respectively connected with a control end of the DSP;
the input-output conversion circuit is provided with a first side and a second side;
the coupling transformer is provided with a primary coil and a secondary coil, and two ends of the secondary coil are respectively connected with the first sides of the corresponding input and output conversion circuits;
the opto-isolator circuit has a first side and a second side;
the second side of the input-output conversion circuit is connected with the first side of the optical coupling isolation circuit, and the second side of the optical coupling isolation circuit is connected with the DSP;
in the first carrier signal communication sub-loop, one end of a primary coil of the coupling transformer is connected with a power grid, and the other end of the primary coil of the coupling transformer is connected with an inversion sub-loop;
in the second carrier signal communication sub-loop, one end of the primary coil of the coupling transformer is connected with the battery, and the other end of the primary coil of the coupling transformer is connected with the rectifier sub-loop;
the input/output conversion circuit adopts an analog-to-digital conversion chip and a digital-to-analog conversion chip; the input end of the analog-to-digital conversion chip is connected with the first side of the input-output conversion circuit, and the output end of the analog-to-digital conversion chip is connected with the second side of the input-output conversion circuit through the amplifier; the input end of the digital-to-analog conversion chip is connected with the second side of the input-output conversion circuit, and the output end of the digital-to-analog conversion chip is connected with the first side of the input-output conversion circuit through an amplifier;
the optical coupling isolation circuit is formed by combining two optical couplers in opposite directions, the input end of one optical coupler is connected with the first side of the optical coupling isolation circuit, and the output end of the optical coupler is connected with the second side of the optical coupling isolation circuit; the input end of the other optical coupler is connected with the second side of the optical coupler isolation circuit, and the output end of the other optical coupler is connected with the first side of the optical coupler isolation circuit. By adopting the structure, the primary side carrier signal containing data is modulated by the first carrier signal communication sub-loop of the primary side charging loop, then enters the secondary side charging loop through the charging path, the primary side carrier signal is analyzed by the second carrier signal communication sub-loop, the secondary side carrier signal is modulated according to the data contained in the primary side carrier signal, then the secondary side carrier signal is sent back along the primary loop, and finally the primary side and the secondary side are received and analyzed by the first carrier signal communication sub-loop, so that the primary side and the secondary side can exchange data information by using the carrier signal, the dependence on WIFI or ZIGBEE is eliminated, and the safety is higher. Simultaneously, this structure only needs reequip current wireless charging device of electric automobile, need not to make whole charging device again, does benefit to and uses widely.
The utility model discloses can also adopt following preferred scheme:
preferably, the primary side charging loop has a first capacitor, a second capacitor and a first inductor, and the first inductor coincides with the transmitting end of the primary side charging loop; the input end of the primary side charging loop comprises a first end and a second end which are respectively connected with a power grid;
one end of the first capacitor is connected with the first end of the primary side charging loop, and the other end of the first capacitor is connected with the second end of the primary side charging loop;
one end of the second capacitor is a first contact, the other end of the second capacitor is connected with one end of the first inductor, and the other end of the first inductor is a second contact;
the inverter sub-loop is provided with a first switch tube, a second switch tube, a third switch tube and a fourth switch tube, and each switch tube is provided with a first pin and a second pin;
the first pin of the first switching tube and the first pin of the second switching tube are respectively connected with the first end of the primary side charging loop;
the second pin of the first switching tube and the first pin of the third switching tube are respectively connected with the first contact;
the second pin of the second switching tube and the first pin of the fourth switching tube are respectively connected with the second contact;
one end of a primary coil of a coupling transformer of the first carrier signal communication sub-loop is connected with a second end of the primary side charging loop; and a second pin of the third switching tube and a second pin of the fourth switching tube are respectively connected with the other end of the primary coil of the coupling transformer.
By adopting the optimal scheme, the structures of the primary side charging loop and the inverter sub-loop thereof can be more simplified.
Preferably, the secondary charging loop has a third capacitor, a second inductor, a third inductor and a first current transformer, and the second inductor is overlapped with a receiving end of the secondary charging loop; the output end of the secondary side charging loop comprises a first end and a second end which are respectively connected with the battery;
one end of the third capacitor is connected with the first end of the secondary charging loop, and the other end of the third capacitor is connected with the second end of the secondary charging loop;
one end of the second inductor is a third contact, and the other end of the second inductor is connected with one end of a third inductor; the first current transformer is provided with a primary side and a secondary side, the other end of the third inductor is connected with one end of the primary side of the first current transformer, and the other end of the primary side of the first current transformer is a fourth connection point; the secondary side of the first current transformer is provided with a measuring instrument, and the signal output end of the measuring instrument is connected with the DSP of the second carrier signal communication sub-loop;
the rectifier sub-circuit is provided with a first diode, a second diode, a fifth switching tube and a sixth switching tube, each diode is provided with a positive electrode and a negative electrode, and each switching tube is provided with a first pin and a second pin;
the cathode of the first diode and the cathode of the second diode are respectively connected with the first end of the secondary side charging loop;
the anode of the first diode and the first pin of the fifth switching tube are respectively connected with a fourth connection point;
the anode of the second diode and the first pin of the sixth switching tube are respectively connected with the third contact;
one end of a primary coil of a coupling transformer of the second carrier signal communication sub-loop is connected with a second end of the secondary side charging loop; and a second pin of the fifth switching tube and a second pin of the sixth switching tube are respectively connected with the other end of the primary coil of the coupling transformer.
By adopting the preferred scheme, the structures of the secondary charging loop and the rectifier sub-loop thereof can be more simplified.
More preferably, the secondary charging loop further has a fourth inductor, a fifth inductor and a second current transformer, and the fourth inductor and the second inductor are coincided with a receiving end of the secondary charging loop;
one end of the fourth inductor is a fifth connection point, and the other end of the fourth inductor is connected with one end of the fifth inductor; the second current transformer is provided with a primary side and a secondary side, the other end of the fifth inductor is connected with one end of the primary side of the second current transformer, and the other end of the primary side of the second current transformer is a sixth connection point; the secondary side of the second current transformer is also provided with a measuring instrument, and the signal output end of the measuring instrument is connected with the DSP of the second carrier signal communication sub-loop;
the rectifier sub-loop is also provided with a third diode, a fourth diode, a seventh switching tube and an eighth switching tube, each diode is provided with a positive electrode and a negative electrode, and each switching tube is provided with a first pin and a second pin;
the negative electrode of the third diode and the negative electrode of the fourth diode are respectively connected with the first end of the secondary side charging loop;
the anode of the third diode and the first pin of the seventh switching tube are respectively connected with the sixth contact;
the anode of the fourth diode and the first pin of the eighth switching tube are respectively connected with a fifth junction;
and a second pin of the seventh switching tube and a second pin of the eighth switching tube are respectively connected with the other end of the primary coil of the coupling transformer.
By adopting the preferred scheme, one path of signal acquisition sample can be added to the secondary side charging loop, and the reliability of signal analysis is improved.
More preferably, each switching tube is a MOS tube, an IGBT tube, a SiC switching tube or a GaN switching tube; when each switching tube is an MOS tube, the first pin is a source electrode, and the second pin is a drain electrode.
With the adoption of the optimal scheme, the type of the switching tube can be selected according to actual requirements.
Preferably, the device has: the DSP of the first carrier signal communication sub-loop sends out a data signal and controls a corresponding optical coupling isolation circuit and an input-output conversion circuit, so that the data signal sequentially passes through a coupling transformer, an inverter sub-loop and a first inductor to send a signal state to a primary side of a secondary side charging loop;
the apparatus further has: on the basis of a primary side signal sending state, the data signal firstly enters a second carrier signal communication sub-loop through a second inductor or a fourth inductor and a rectifier sub-loop in sequence, and then is sent to a secondary side signal receiving state of a DSP of the second carrier signal communication sub-loop through a coupling transformer, a corresponding input/output conversion circuit and an optical coupling isolation circuit in sequence;
the apparatus further has: on the basis of a secondary side signal receiving state, the DSP of the second carrier signal communication sub-loop analyzes the received data signal and generates corresponding feedback data, the DSP also generates charging monitoring data according to current and/or voltage signals sent by the first current transformer and the second current transformer, and the DSP makes the feedback data and the charging monitoring data into feedback signals and controls corresponding optical coupling isolation circuits and input/output conversion circuits, so that the feedback signals sequentially pass through the coupling transformer, the rectifier sub-loop, the second inductor or the fourth inductor to send secondary side feedback signal states to the primary side charging loop;
the apparatus further has: on the basis of the secondary side feedback signal state, the feedback signal enters the first carrier signal communication sub-loop through the first inductor and the inverter sub-loop in sequence, then is sent to the DSP of the first carrier signal communication sub-loop through the coupling transformer, the corresponding input-output conversion circuit and the optical coupling isolation circuit in sequence, and the primary side receiving signal state of the feedback signal is analyzed by the DSP.
With this preferred solution, the respective critical states of the entire device can be made more unambiguous. In addition, in the implementation, the DSP of the first carrier signal communication sub-loop may be connected to an external computer, so as to monitor the communication situation in real time, so as to control the charging process by controlling the charging device.
Preferably, the inverter sub-circuit is a full bridge circuit or a half bridge circuit.
Preferably, the rectifier sub-loop is a rectifier circuit using a common diode, or the rectifier sub-loop is a synchronous rectifier circuit.
Preferably, the primary side charging circuit adopts an LLC circuit structure or a phase-shifted full-bridge circuit structure; and the secondary side charging loop adopts a BOOST circuit structure or a BUCKBOOST circuit structure.
With the above preferred embodiments, specific choices can be made in actual implementation.
The utility model discloses a carrier communication has broken away from WIFI or ZIGBEE's dependence, and the security is higher, and only needs to reequip the carrier signal communication that can realize former secondary to current wireless charging device of electric automobile, need not to make whole charging device again.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a typical architecture diagram of wireless charging as mentioned in the background.
Fig. 2 is a schematic diagram of a circuit structure according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an input/output conversion circuit according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of the optical coupling isolation circuit in the embodiment of the present invention.
Detailed Description
Examples
As shown in fig. 2, the carrier communication type wireless charging device for an electric vehicle of the present embodiment includes a primary charging loop and a secondary charging loop, wherein an input end of the primary charging loop is communicated with a power grid, and an output end of the secondary charging loop is communicated with a battery; the transmitting end of the primary side charging loop corresponds to the receiving end of the secondary side charging loop; the primary side charging loop is provided with an inverter sub-loop and a first carrier signal communication sub-loop, and the first carrier signal communication sub-loop is positioned on one side of the inverter sub-loop, which is close to a power grid; the secondary charging loop is provided with a rectifying sub-loop and a second carrier signal communication sub-loop, and the second carrier signal communication sub-loop is positioned on one side of the rectifying sub-loop, which is close to the battery.
Specifically, the first carrier signal communication sub-loop and the second carrier signal communication sub-loop have the same structure and are respectively composed of a coupling transformer T1 or T2, an input-output conversion circuit, an optical coupling isolation circuit and a DSP, and a controlled end of the input-output conversion circuit and a controlled end of the optical coupling isolation circuit are respectively connected with a control end of the DSP; the input-output conversion circuit is provided with a first side and a second side; the coupling transformer T1 or T2 is provided with a primary coil and a secondary coil, and two ends of the secondary coil are respectively connected with the first sides of the corresponding input and output conversion circuits; the optical coupling isolation circuit is provided with a first side and a second side; the second side of the input-output conversion circuit is connected with the first side of the optical coupling isolation circuit, and the second side of the optical coupling isolation circuit is connected with the DSP; in the first carrier signal communication sub-loop, one end of a primary coil of a coupling transformer T1 is connected with a power grid, and the other end of the primary coil is connected with an inverter sub-loop; in the second carrier signal communication sub-loop, one end of the primary coil of the coupling transformer T2 is connected to the battery, and the other end thereof is connected to the rectifying sub-loop.
As shown in fig. 3, the input/output conversion circuit employs an analog-to-digital conversion chip and a digital-to-analog conversion chip; the input end of the analog-to-digital conversion chip is connected with the first side of the input-output conversion circuit, and the output end of the analog-to-digital conversion chip is connected with the second side of the input-output conversion circuit through the amplifier; the input end of the digital-to-analog conversion chip is connected with the second side of the input-output conversion circuit, and the output end of the digital-to-analog conversion chip is connected with the first side of the input-output conversion circuit through the amplifier. The analog-to-digital conversion chip can adopt ADC0808 and the like, the digital-to-analog conversion chip can adopt AD5320 and the like, and the amplifier can adopt a commercially available circuit or a conventional circuit. When the device is used, the DSP control chip can complete the corresponding input and output conversion function.
The optical coupling isolation circuit is formed by combining two optical couplers in opposite directions, as shown in fig. 4, the two optical couplers have the same structure and respectively have an input end and an output end, the input end of the optical coupler is provided with an anode 1 and a cathode 2, and the output end of the optical coupler is provided with an emitter 3 and a collector 4. The optocoupler may employ TLP185 or the like. The input end of the optical coupler is connected with the first side of the optical coupler isolation circuit, and the output end of the optical coupler is connected with the second side of the optical coupler isolation circuit; the other optocoupler is completely opposite, namely the input end of the other optocoupler is connected with the second side of the optocoupler isolation circuit, and the output end of the other optocoupler is connected with the first side of the optocoupler isolation circuit. When the optical coupler is used specifically, the DSP can be used for controlling and receiving an output signal of one optical coupler or outputting a signal to another optical coupler, so that the optical coupler isolation function is completed.
The primary side charging loop is provided with a first capacitor C1, a second capacitor Cp and a first inductor L1, and the first inductor L1 is superposed with the transmitting end of the primary side charging loop; the input end of the primary side charging loop comprises a first end A and a second end B which are respectively connected with a power grid; one end of the first capacitor C1 is connected with the first end A of the primary side charging loop, and the other end of the first capacitor C1 is connected with the second end B of the primary side charging loop; one end of the second capacitor Cp is a first contact i, the other end of the second capacitor Cp is connected with one end of the first inductor L1, and the other end of the first inductor L1 is a second contact ii; the inverter sub-loop is provided with a first switch tube S1, a second switch tube S2, a third switch tube S3 and a fourth switch tube S4, and each switch tube is provided with a first pin and a second pin; a first pin of the first switching tube S1 and a first pin of the second switching tube S2 are respectively connected with a first end A of the primary side charging loop; the second pin of the first switch tube S1 and the first pin of the third switch tube S3 are connected to the first contact i, respectively; the second pin of the second switch tube S2 and the first pin of the fourth switch tube S4 are respectively connected to the second contact ii; one end of a primary coil of a coupling transformer T1 of the first carrier signal communication sub-loop is connected with a second end B of the primary side charging loop; the second pin of the third switch tube S3 and the second pin of the fourth switch tube S4 are respectively connected to the other end of the primary winding of the coupling transformer T1.
The secondary side charging loop is provided with a third capacitor C2 and a second inductor LDDA third inductor LS1And a first current transformer CT1Second inductance LDDThe receiving end of the secondary side charging loop is superposed; the output end of the secondary side charging loop comprises a first end X and a second end Y which are respectively connected with the battery; third stepOne end of the capacitor C2 is connected with the first end X of the secondary charging circuit, and the other end of the third capacitor C2 is connected with the second end Y of the secondary charging circuit; second inductance LDDOne end of (iii) a third contact point (iii), a second inductor (L)DDAnd the other end of the third inductor LS1Is connected with one end of the connecting rod; first current transformer CT1Having a primary side and a secondary side, a third inductor LS1And the other end of the first current transformer CT1One end of the primary side is connected with a first current transformer CT1The other end of the primary side is a fourth contact iv; first current transformer CT1The secondary side has a meter (not shown) whose signal output is connected to the DSP of the second carrier signal communication sub-loop (for simplicity, indicated by an arrow in the figure); the rectifier sub-loop is provided with a first diode S9, a second diode S10, a fifth switch tube S11 and a sixth switch tube S12, each diode is provided with a positive pole and a negative pole, and each switch tube is provided with a first pin and a second pin; the cathode of the first diode S9 and the cathode of the second diode S10 are respectively connected with the first end X of the secondary side charging loop; the positive electrode of the first diode S9 and the first pin of the fifth switching tube S11 are connected to the fourth contact iv, respectively; the anode of the second diode S10 and the first pin of the sixth switching tube S12 are connected to the third contact iii, respectively; one end of the primary coil of the coupling transformer T2 of the second carrier signal communication sub-loop is connected with the second end Y of the secondary side charging loop; a second pin of the fifth switching tube S11 and a second pin of the sixth switching tube S12 are respectively connected to the other end of the primary winding of the coupling transformer T2.
The secondary charging loop is also provided with a fourth inductor LQA fifth inductor LS2And a second current transformer CT2Fourth inductance LQAnd a second inductance LDDThe two are coincided with a receiving end of a secondary side charging loop together; fourth inductor LQOne end of (b) is a fifth contact v, a fourth inductor LQAnd the other end of the first inductor and the fifth inductor LS2Is connected with one end of the connecting rod; second current transformer CT2Having primary and secondary sides, a fifth inductor LS2And the other end of the first current transformer CT and the second current transformer CT2One end of the primary side is connected with a second current transformer CT2The other end of the primary side is a sixth junction vi; second current transformer CT2The secondary side also has a meter (not shown) whose signal output is connected to the DSP of the second carrier signal communication sub-loop (for simplicity, indicated by an arrow in the figure); the rectifier sub-loop further comprises a third diode S13, a fourth diode S14, a seventh switch tube S15 and an eighth switch tube S16, each diode has a positive pole and a negative pole, and each switch tube has a first pin and a second pin; the cathode of the third diode S13 and the cathode of the fourth diode S14 are respectively connected to the first end X of the secondary charging circuit; the anode of the third diode S13 and the first pin of the seventh switching tube S15 are connected to the sixth junction vi, respectively; the anode of the fourth diode S14 and the first pin of the eighth switching tube S16 are connected to the fifth junction v, respectively; the second pin of the seventh switch tube S15 and the second pin of the eighth switch tube S16 are connected to the other end of the primary winding of the coupling transformer T2, respectively.
The present embodiment may also perform some replacement adjustments according to actual situations, for example:
each switching tube is an MOS tube, an IGBT tube, a SiC switching tube or a GaN switching tube; when each switching tube is an MOS tube, the first pin is a source electrode, and the second pin is a drain electrode.
The inverter sub-loop is a full-bridge circuit or a half-bridge circuit.
The rectifier sub-loop is a rectifier circuit adopting a common diode, or the rectifier sub-loop is a synchronous rectifier circuit.
The primary side charging loop adopts an LLC circuit structure or a phase-shifted full-bridge circuit structure; and the secondary side charging loop adopts a BOOST circuit structure or a BUCKBOOST circuit structure.
The device of the embodiment has four states, which are specifically as follows:
(1) the DSP of the first carrier signal communication sub-loop sends out a data signal and controls a corresponding optical coupling isolation circuit and an input-output conversion circuit, so that the data signal sequentially passes through a coupling transformer T1, an inverter sub-loop and a first inductor L1 to send a signal state to a primary side of a secondary side charging loop;
(2) on the basis of (1), the data signals are firstly and sequentiallyVia a second inductor LDDOr a fourth inductance LQThe rectifier sub-loop enters a second carrier signal communication sub-loop and then sequentially passes through a coupling transformer T2, a corresponding input/output conversion circuit and an optical coupling isolation circuit to be sent to a secondary side of a DSP of the second carrier signal communication sub-loop to receive a signal state;
(3) on the basis of (2), the DSP of the second carrier signal communication sub-loop analyzes the received data signal and generates corresponding feedback data, and the DSP also generates corresponding feedback data according to the first current transformer CT1And a second current transformer CT2The DSP makes the feedback data and the charging monitoring data into feedback signals and controls corresponding optical coupling isolation circuits and input/output conversion circuits, so that the feedback signals sequentially pass through a coupling transformer T2, a rectifier circuit and a second inductor LDDOr a fourth inductance LQThe secondary side feedback signal state is sent to the primary side charging loop;
(4) on the basis of (3), the feedback signal enters the first carrier signal communication sub-loop through the first inductor L1 and the inverter sub-loop in sequence, then is sent to the DSP of the first carrier signal communication sub-loop through the coupling transformer T1, the corresponding input-output conversion circuit and the optical coupling isolation circuit in sequence, and the primary side receiving signal state of the feedback signal is analyzed by the DSP.
When in use, the information interaction of the original side and the secondary side can be realized one by one according to the steps (1) to (4). On the basis, the DSP of the first carrier signal communication sub-loop can be connected with an external computer, so that the communication condition can be monitored in real time, and the charging process can be controlled by controlling the charging device.
In addition, when the system is implemented, signals sent by each DSP are high-frequency carrier signals, and the power frequency range of the signals is at least 10 times of the switching frequency of the switching tube, so that higher harmonic interference can be avoided, the system is more suitable for working in a strong interference electromagnetic environment, and the reliability is improved. For example, the switching frequency of the switching tube is 85KHz, and the power band of the high-frequency carrier signal should be at least 850 KHz.
The electric components of the present embodiment are each constituted by conventional electronic components. If the embodiment relates to the software control program in the implementation process, the related software control programs are mature prior art products, and meanwhile, the embodiment only relates to the use of the existing software control program and does not have the improvement on the software control program.
In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.

Claims (9)

1. A carrier communication type wireless charging device for an electric automobile comprises a primary side charging loop and a secondary side charging loop, wherein the input end of the primary side charging loop is communicated with a power grid, and the output end of the secondary side charging loop is communicated with a battery; the transmitting end of the primary side charging loop corresponds to the receiving end of the secondary side charging loop; the primary side charging loop is provided with an inverter sub-loop and a first carrier signal communication sub-loop, and the first carrier signal communication sub-loop is positioned on one side of the inverter sub-loop, which is close to a power grid; the secondary charging loop is provided with a rectifying sub-loop and a second carrier signal communication sub-loop, and the second carrier signal communication sub-loop is positioned on one side of the rectifying sub-loop, which is close to the battery; it is characterized in that the utility model is characterized in that,
the first carrier signal communication sub-loop and the second carrier signal communication sub-loop have the same structure and respectively consist of a coupling transformer, an input-output conversion circuit, an optical coupling isolation circuit and a DSP (digital signal processor), and a controlled end of the input-output conversion circuit and a controlled end of the optical coupling isolation circuit are respectively connected with a control end of the DSP;
the input-output conversion circuit is provided with a first side and a second side;
the coupling transformer is provided with a primary coil and a secondary coil, and two ends of the secondary coil are respectively connected with the first sides of the corresponding input and output conversion circuits;
the opto-isolator circuit has a first side and a second side;
the second side of the input-output conversion circuit is connected with the first side of the optical coupling isolation circuit, and the second side of the optical coupling isolation circuit is connected with the DSP;
in the first carrier signal communication sub-loop, one end of a primary coil of the coupling transformer is connected with a power grid, and the other end of the primary coil of the coupling transformer is connected with an inversion sub-loop;
in the second carrier signal communication sub-loop, one end of the primary coil of the coupling transformer is connected with the battery, and the other end of the primary coil of the coupling transformer is connected with the rectifier sub-loop;
the input/output conversion circuit adopts an analog-to-digital conversion chip and a digital-to-analog conversion chip; the input end of the analog-to-digital conversion chip is connected with the first side of the input-output conversion circuit, and the output end of the analog-to-digital conversion chip is connected with the second side of the input-output conversion circuit through the amplifier; the input end of the digital-to-analog conversion chip is connected with the second side of the input-output conversion circuit, and the output end of the digital-to-analog conversion chip is connected with the first side of the input-output conversion circuit through an amplifier;
the optical coupling isolation circuit is formed by combining two optical couplers in opposite directions, the input end of one optical coupler is connected with the first side of the optical coupling isolation circuit, and the output end of the optical coupler is connected with the second side of the optical coupling isolation circuit; the input end of the other optical coupler is connected with the second side of the optical coupler isolation circuit, and the output end of the other optical coupler is connected with the first side of the optical coupler isolation circuit.
2. The carrier communication type wireless charging device for the electric automobile according to claim 1, wherein the primary side charging loop has a first capacitor, a second capacitor and a first inductor, and the first inductor is overlapped with a transmitting end of the primary side charging loop; the input end of the primary side charging loop comprises a first end and a second end which are respectively connected with a power grid;
one end of the first capacitor is connected with the first end of the primary side charging loop, and the other end of the first capacitor is connected with the second end of the primary side charging loop;
one end of the second capacitor is a first contact, the other end of the second capacitor is connected with one end of the first inductor, and the other end of the first inductor is a second contact;
the inverter sub-loop is provided with a first switch tube, a second switch tube, a third switch tube and a fourth switch tube, and each switch tube is provided with a first pin and a second pin;
the first pin of the first switching tube and the first pin of the second switching tube are respectively connected with the first end of the primary side charging loop;
the second pin of the first switching tube and the first pin of the third switching tube are respectively connected with the first contact;
the second pin of the second switching tube and the first pin of the fourth switching tube are respectively connected with the second contact;
one end of a primary coil of a coupling transformer of the first carrier signal communication sub-loop is connected with a second end of the primary side charging loop; and a second pin of the third switching tube and a second pin of the fourth switching tube are respectively connected with the other end of the primary coil of the coupling transformer.
3. The carrier communication type wireless charging device for the electric vehicle as claimed in claim 2, wherein the secondary charging loop comprises a third capacitor, a second inductor, a third inductor and a first current transformer, and the second inductor is coincident with a receiving end of the secondary charging loop; the output end of the secondary side charging loop comprises a first end and a second end which are respectively connected with the battery;
one end of the third capacitor is connected with the first end of the secondary charging loop, and the other end of the third capacitor is connected with the second end of the secondary charging loop;
one end of the second inductor is a third contact, and the other end of the second inductor is connected with one end of a third inductor; the first current transformer is provided with a primary side and a secondary side, the other end of the third inductor is connected with one end of the primary side of the first current transformer, and the other end of the primary side of the first current transformer is a fourth connection point; the secondary side of the first current transformer is provided with a measuring instrument, and the signal output end of the measuring instrument is connected with the DSP of the second carrier signal communication sub-loop;
the rectifier sub-circuit is provided with a first diode, a second diode, a fifth switching tube and a sixth switching tube, each diode is provided with a positive electrode and a negative electrode, and each switching tube is provided with a first pin and a second pin;
the cathode of the first diode and the cathode of the second diode are respectively connected with the first end of the secondary side charging loop;
the anode of the first diode and the first pin of the fifth switching tube are respectively connected with a fourth connection point;
the anode of the second diode and the first pin of the sixth switching tube are respectively connected with the third contact;
one end of a primary coil of a coupling transformer of the second carrier signal communication sub-loop is connected with a second end of the secondary side charging loop; and a second pin of the fifth switching tube and a second pin of the sixth switching tube are respectively connected with the other end of the primary coil of the coupling transformer.
4. The carrier communication type wireless charging device for the electric automobile as claimed in claim 3, wherein the secondary charging loop further comprises a fourth inductor, a fifth inductor and a second current transformer, and the fourth inductor and the second inductor are jointly overlapped with a receiving end of the secondary charging loop;
one end of the fourth inductor is a fifth connection point, and the other end of the fourth inductor is connected with one end of the fifth inductor; the second current transformer is provided with a primary side and a secondary side, the other end of the fifth inductor is connected with one end of the primary side of the second current transformer, and the other end of the primary side of the second current transformer is a sixth connection point; the secondary side of the second current transformer is also provided with a measuring instrument, and the signal output end of the measuring instrument is connected with the DSP of the second carrier signal communication sub-loop;
the rectifier sub-loop is also provided with a third diode, a fourth diode, a seventh switching tube and an eighth switching tube, each diode is provided with a positive electrode and a negative electrode, and each switching tube is provided with a first pin and a second pin;
the negative electrode of the third diode and the negative electrode of the fourth diode are respectively connected with the first end of the secondary side charging loop;
the anode of the third diode and the first pin of the seventh switching tube are respectively connected with the sixth contact;
the anode of the fourth diode and the first pin of the eighth switching tube are respectively connected with a fifth junction;
and a second pin of the seventh switching tube and a second pin of the eighth switching tube are respectively connected with the other end of the primary coil of the coupling transformer.
5. The carrier communication type wireless charging device for the electric automobile according to any one of claims 2 to 4, wherein each switching tube is a MOS tube, an IGBT tube, a SiC switching tube or a GaN switching tube; when each switching tube is an MOS tube, the first pin is a source electrode, and the second pin is a drain electrode.
6. The carrier communication type wireless charging apparatus for an electric vehicle according to claim 4, wherein the apparatus comprises: the DSP of the first carrier signal communication sub-loop sends out a data signal and controls a corresponding optical coupling isolation circuit and an input-output conversion circuit, so that the data signal sequentially passes through a coupling transformer, an inverter sub-loop and a first inductor to send a signal state to a primary side of a secondary side charging loop;
the apparatus further has: on the basis of a primary side signal sending state, the data signal firstly enters a second carrier signal communication sub-loop through a second inductor or a fourth inductor and a rectifier sub-loop in sequence, and then is sent to a secondary side signal receiving state of a DSP of the second carrier signal communication sub-loop through a coupling transformer, a corresponding input/output conversion circuit and an optical coupling isolation circuit in sequence;
the apparatus further has: on the basis of a secondary side signal receiving state, the DSP of the second carrier signal communication sub-loop analyzes the received data signal and generates corresponding feedback data, the DSP also generates charging monitoring data according to current and/or voltage signals sent by the first current transformer and the second current transformer, and the DSP makes the feedback data and the charging monitoring data into feedback signals and controls corresponding optical coupling isolation circuits and input/output conversion circuits, so that the feedback signals sequentially pass through the coupling transformer, the rectifier sub-loop, the second inductor or the fourth inductor to send secondary side feedback signal states to the primary side charging loop;
the apparatus further has: on the basis of the secondary side feedback signal state, the feedback signal enters the first carrier signal communication sub-loop through the first inductor and the inverter sub-loop in sequence, then is sent to the DSP of the first carrier signal communication sub-loop through the coupling transformer, the corresponding input-output conversion circuit and the optical coupling isolation circuit in sequence, and the primary side receiving signal state of the feedback signal is analyzed by the DSP.
7. The carrier communication type wireless charging device for the electric vehicle as claimed in claim 1, wherein the inverter sub-circuit is a full bridge circuit or a half bridge circuit.
8. The carrier communication type wireless charging device for the electric vehicle according to claim 1, wherein the rectifier sub-circuit is a rectifier circuit using a common diode, or the rectifier sub-circuit is a synchronous rectifier circuit.
9. The carrier communication type wireless charging device for the electric automobile according to claim 1, wherein the primary charging loop adopts an LLC circuit structure or a phase-shifted full-bridge circuit structure; and the secondary side charging loop adopts a BOOST circuit structure or a BUCKBOOST circuit structure.
CN201921262080.2U 2019-08-06 2019-08-06 Carrier communication type wireless charging device for electric automobile Active CN211684682U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921262080.2U CN211684682U (en) 2019-08-06 2019-08-06 Carrier communication type wireless charging device for electric automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921262080.2U CN211684682U (en) 2019-08-06 2019-08-06 Carrier communication type wireless charging device for electric automobile

Publications (1)

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CN211684682U true CN211684682U (en) 2020-10-16

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Country Status (1)

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