CN109515220B - Wireless charging device and wireless charging method applied to double loads of electric automobile - Google Patents
Wireless charging device and wireless charging method applied to double loads of electric automobile Download PDFInfo
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- CN109515220B CN109515220B CN201811538190.7A CN201811538190A CN109515220B CN 109515220 B CN109515220 B CN 109515220B CN 201811538190 A CN201811538190 A CN 201811538190A CN 109515220 B CN109515220 B CN 109515220B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000013329 compounding Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 10
- 230000009977 dual effect Effects 0.000 description 6
- 238000004088 simulation Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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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
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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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T10/72—Electric energy management in electromobility
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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
- 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
- Y02T90/12—Electric charging stations
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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Abstract
The invention belongs to the technical field of wireless charging, and particularly relates to a wireless charging device and a wireless charging method applied to double loads of an electric automobile. Compared with the prior art, the invention has the beneficial effects that: 1) The wireless charging device of the electric automobile can realize wireless power transmission of double loads, and the construction cost of the charging pile is saved; 2) The control method of the wireless charging device of the electric automobile can realize wireless power transmission of double loads, and the charging loads can be charged simultaneously, so that charging time is saved; 3) The control method of the wireless charging device of the electric automobile realizes the power distribution control of each load by a frequency separation method at an alternating current power supply end, and has simple and convenient operation and good centralized control performance.
Description
Technical Field
The invention belongs to the technical field of wireless charging, and particularly relates to a wireless charging device and a wireless charging method applied to double loads of an electric automobile.
Background
The electric automobile is charged in a contact type charging mode and a non-contact type charging mode. At present, the electric automobile charging pile is charged in a contact mode. Compared with contact charging, non-contact charging has the advantages of reducing the cost of the cable, reducing the heat loss of the internal resistance of the circuit, avoiding the mechanical abrasion of the interface and the like. In addition, the wireless charging can realize intelligent automatic control, and the operation is simpler and more convenient. Therefore, the wireless charging of the electric automobile has important significance for the development and popularization of the electric automobile.
At present, the wireless charging device of the electric automobile is mostly used for one-to-one charging, and the charging time of the electric automobile is required to be a certain time, so that the requirement of the charging pile of the electric automobile is greatly increased. For a storage battery-super capacitor hybrid energy storage system, the charging requirements of the storage battery-super capacitor hybrid energy storage system and the storage battery-super capacitor hybrid energy storage system are different, if a common one-to-one charging method is adopted, wireless charging of the storage battery and the super capacitor is required to be completed in sequence, and the operation is inconvenient.
Accordingly, in order to solve the above-mentioned problems, it is necessary to provide a new wireless charging device and wireless charging method.
Disclosure of Invention
A first object of the present invention is to provide a wireless charging device applied to dual loads of an electric vehicle, which aims at overcoming the drawbacks of the prior art.
For this purpose, the above object of the present invention is achieved by the following technical solutions:
The wireless charging device applied to the double loads of the electric automobile is characterized by comprising an alternating current power supply, a loose coupling transformer and a rectifying and filtering unit; the loose coupling transformer comprises a transmitting end, a first receiving end and a second receiving end; the transmitting end is connected to an alternating current power supply, the first receiving end and the second receiving end are respectively connected to a first rectifying and filtering unit and a second rectifying and filtering unit, and the output ends of the first rectifying and filtering unit and the second rectifying and filtering unit are respectively connected to a first electric automobile rechargeable battery load and a second electric automobile rechargeable battery load.
The invention can also adopt or combine the following technical proposal when adopting the technical proposal:
Preferably, the ac power supply outputs a voltage source composed of two sinusoidal components, and the operating frequencies of the two sinusoidal components are different from each other.
Preferably, the natural frequencies of the first receiving end and the second receiving end of the loose coupling transformer are respectively the same as the working frequencies of the two sine wave components of the alternating current power supply, and the natural frequency of the transmitting end of the loose coupling transformer is between the working frequencies of the two sine wave components of the alternating current power supply.
The second object of the present invention is to provide a wireless charging method applied to dual loads of an electric vehicle, aiming at the defects existing in the background art.
For this purpose, the above object of the present invention is achieved by the following technical solutions:
The wireless charging method applied to the dual loads of the electric automobile is based on the wireless charging device applied to the dual loads of the electric automobile, and comprises the following steps: and comprises: the alternating current power supply outputs a voltage source formed by compounding two sine wave components, the working frequencies of the two sine wave components are different from each other, and the working frequencies are respectively marked as f 1 and f 2; the natural frequencies of the first receiving end and the second receiving end of the loose coupling transformer are respectively the same as the working frequencies of the two sine wave components of the alternating current power supply, and the natural frequency of the transmitting end of the loose coupling transformer is between the working frequencies of the two sine wave components of the alternating current power supply; according to the frequency selection characteristic of wireless charging, the transmission efficiency of the f 1 component of the alternating-current power supply to the first receiving end is far higher than that of the second receiving end, the transmission efficiency of the f 2 component of the alternating-current power supply to the second receiving end is far higher than that of the first receiving end, wireless charging of two electric vehicle charging loads can be achieved through unified configuration and regulation of the amplitude of each frequency component of the alternating-current power supply on the alternating-current power supply side, and control of power distribution of the two charging loads is achieved on the alternating-current power supply side.
The principle of the wireless charging device for realizing double-load charging control is as follows:
Defining the ac power supply as U s sin (2pi ft), when two receiving ends are located at two sides of the power supply, the coupling between the two receiving ends can be approximately ignored. The energy transfer efficiency ratio of the two loads is:
Wherein η L1 and η L2 respectively represent energy transmission efficiency of two charging loads, P L1 and P L2 respectively represent power of two charging loads, M 1 represents mutual inductance of a transmitting end and a first receiving end, M 2 represents mutual inductance of the transmitting end and a second receiving end, r 1 and r 2 respectively represent internal resistances of the first receiving end and the second receiving end, r 1+Req1 represents equivalent resistance of a first receiving end loop, r 2+Req2 represents equivalent resistance of a second receiving end loop, f 1 and f 2 respectively represent natural frequencies of the first receiving end loop and the second receiving end loop, AndThe circuit quality factors of the first receiving end loop and the second receiving end loop are respectively represented, and L 1 and L 2 represent the self-inductance of the first receiving end and the second receiving end respectively.
The transmission characteristics of the dual-load resonant wireless power transmission system are related to mutual inductance parameters, circuit quality factors and frequency offset conditions. In particular, at an operating frequency of f 1, the load 1 obtains a large amount of transmission power, and at an operating frequency of f 2, most of the power is transmitted to the load 2 side.
According to the superposition principle of the circuit, the power received by the load side can be regarded as the sum of the load powers transmitted by different components at the multi-frequency voltage source side. For a composite voltage source U s1sin(2πf1t)+Us2sin(2πf2 t), the power delivered by the power supply component U s1sin(2πf1 t) is received primarily by load 1, while the power delivered by U s2sin(2πf2 t) is received primarily by load 2. By adjusting the amplitude values of the two frequency power supply components, the load power distribution can be uniformly regulated and controlled at the power supply side.
Compared with the prior art, the invention has the beneficial effects that:
1) The wireless charging device of the electric automobile can realize wireless power transmission of double loads, and the construction cost of the charging pile is saved;
2) The control method of the wireless charging device of the electric automobile can realize wireless power transmission of double loads, and the charging loads can be charged simultaneously, so that charging time is saved;
3) The control method of the wireless charging device of the electric automobile realizes the power distribution control of each load by a frequency separation method at an alternating current power supply end, and has simple and convenient operation and good centralized control performance.
Drawings
Fig. 1 is a schematic diagram of a wireless charging device applied to dual loads of an electric vehicle.
Fig. 2a-2b are diagrams of simulation results of the wireless charging method provided by the present invention.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific embodiments.
Fig. 1 is a schematic diagram of a wireless charging device applied to dual loads of an electric vehicle. As shown in fig. 1, the wireless charging device includes an ac power source, a loosely coupled transformer, and a rectifying and filtering unit.
The alternating current power supply 1 is connected with the transmitting end 21 of the loose coupling transformer 2, the receiving end 1 receives the alternating current electromagnetic field energy which is transmitted by the transmitting end 21 in a wireless mode, and a direct current signal is obtained through the rectifying and filtering unit 3 and acts on the load electric automobile battery 1. The receiving end 2 receives the alternating current electromagnetic field energy transmitted by the transmitting end 21 in a wireless way, and a direct current signal is obtained through the rectifying and filtering unit 5 and acts on the load electric automobile battery 2.
The ac power source is composed of sinusoidal voltage sources of different frequencies (denoted f1 and f2 respectively). The natural frequencies of the receiving end 1 and the receiving end 2 are respectively the same as the frequencies of the alternating current power supply components, and the natural frequency of the transmitting end is between the frequencies of the two alternating current power supply components. According to the frequency selection characteristic of wireless charging, the transmission efficiency of the energy from the f1 component of the alternating current power supply to the receiving end 1 is far higher than that of the receiving end 2, the transmission efficiency of the energy from the f2 component of the alternating current power supply to the receiving end 2 is far higher than that of the receiving end 1, the amplitude of each frequency component of the alternating current power supply is uniformly configured and regulated on the power supply side, the wireless charging of charging loads of two electric vehicles can be realized, and the power distribution control of the two charging loads is realized on the power supply side.
The invention also provides a control method of the wireless charging device of the electric automobile, and the alternating current power supply is formed by compounding sinusoidal voltage sources with different frequencies (marked as f1 and f 2). The natural frequencies of the receiving end 1 and the receiving end 2 are respectively the same as the frequencies of the alternating current power supply components, and the natural frequency of the transmitting end is between the frequencies of the two alternating current power supply components. For a composite voltage source U s1sin(2πf1t)+Us2sin(2πf2 t), the power delivered by the power component U s1sin(2πf1 t is primarily received by the load 1 (i.e., the electric vehicle battery 1), while the power delivered by U s2sin(2πf2 t is primarily received by the load 2 (i.e., the electric vehicle battery 2). By adjusting the amplitude values of the two frequency power supply components, the load power distribution can be uniformly regulated and controlled at the power supply side.
The embodiment of the invention carries out simulation verification on the control method of the wireless charging device of the electric automobile. The simulation device constructed in this embodiment is as follows:
The alternating current power supply is Us, the component frequencies of the two sinusoidal voltage sources are f1=3 kHz and f2=5 kHz respectively, the natural frequency of the transmitting end is 4kHz, the natural frequency of the receiving end 1 is 3kHz, and the natural frequency of the receiving end 2 is 5kHz. The rectifying and filtering unit adopts uncontrolled rectification and LC filtering, and the load adopts two pure resistance loads of 5 omega to equivalent the power characteristics of the energy storage battery at a short charging interval.
In this embodiment, the control method of the wireless charging device of the electric automobile specifically includes: and adjusting the amplitude combination of the sine wave components of the alternating current power supply, and measuring the charging voltage and charging current changes of the two loads.
The simulation results obtained are shown in fig. 2a-2b, and fig. 2a-2b are graphs of simulation results of the wireless charging method provided by the invention, wherein different combinations of power components can cause differences in load side power distribution. The ac power supply is shown as U s＝24sin(2πf1t)+24sin(2πf2 t in fig. 2 a); the ac power supply is shown as U s＝24sin(2πf1t)+12sin(2πf2 t in fig. 2 b); in fig. 2a, the receiving frequencies of the two loads differ very little, while reducing the magnitude of the f2 supply component will result in a larger proportion of the transmission power of the load 1, i.e. as shown in fig. 2 b.
The above detailed description is intended to illustrate the present invention by way of example only and not to limit the invention to the particular embodiments disclosed, but to limit the invention to the precise embodiments disclosed, and any modifications, equivalents, improvements, etc. that fall within the spirit and scope of the invention as defined by the appended claims.
Claims (1)
1. The wireless charging method applied to the double loads of the electric automobile is characterized by comprising the following steps of: the alternating current power supply outputs a voltage source formed by compounding two sine wave components, the working frequencies of the two sine wave components are different from each other, and the working frequencies are respectively marked as f 1 and f 2; the natural frequencies of the first receiving end and the second receiving end of the loose coupling transformer are respectively the same as the working frequencies of the two sine wave components of the alternating current power supply, and the natural frequency of the transmitting end of the loose coupling transformer is between the working frequencies of the two sine wave components of the alternating current power supply; according to the frequency selection characteristic of wireless charging, the transmission efficiency of the f 1 component of the alternating-current power supply to the first receiving end is far higher than that of the second receiving end, the transmission efficiency of the f 2 component of the alternating-current power supply to the second receiving end is far higher than that of the first receiving end, wireless charging of two electric vehicle charging loads can be achieved through unified configuration and regulation of the amplitude of each frequency component of the alternating-current power supply on the alternating-current power supply side, and control of power distribution of the two charging loads is achieved on the alternating-current power supply side;
the load power distribution is uniformly regulated and controlled at the power supply side by adjusting the amplitude values of the two frequency power supply components.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811538190.7A CN109515220B (en) | 2018-12-16 | 2018-12-16 | Wireless charging device and wireless charging method applied to double loads of electric automobile |
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| CN201811538190.7A CN109515220B (en) | 2018-12-16 | 2018-12-16 | Wireless charging device and wireless charging method applied to double loads of electric automobile |
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| CN109515220A CN109515220A (en) | 2019-03-26 |
| CN109515220B true CN109515220B (en) | 2024-09-27 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532251A (en) * | 2013-10-22 | 2014-01-22 | 南车株洲电力机车有限公司 | Electromagnetic induction charging system of energy-storage electromobile |
| CN108667154A (en) * | 2018-05-21 | 2018-10-16 | 南昌大学 | A multi-frequency multi-load wireless charging platform with load isolation characteristics |
| CN209634299U (en) * | 2018-12-16 | 2019-11-15 | 中国电建集团华东勘测设计研究院有限公司 | A kind of wireless charging device applied to the double loads of electric car |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7212414B2 (en) * | 1999-06-21 | 2007-05-01 | Access Business Group International, Llc | Adaptive inductive power supply |
| WO2016064725A1 (en) * | 2014-10-20 | 2016-04-28 | Momentum Dynamics Corporation | Method and apparatus for intrinsic power factor correction |
| CN204794286U (en) * | 2015-06-02 | 2015-11-18 | 介面光电股份有限公司 | Wireless charging device and system |
| KR102242819B1 (en) * | 2015-11-19 | 2021-04-22 | 애플 인크. | Inductive power transmitter |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532251A (en) * | 2013-10-22 | 2014-01-22 | 南车株洲电力机车有限公司 | Electromagnetic induction charging system of energy-storage electromobile |
| CN108667154A (en) * | 2018-05-21 | 2018-10-16 | 南昌大学 | A multi-frequency multi-load wireless charging platform with load isolation characteristics |
| CN209634299U (en) * | 2018-12-16 | 2019-11-15 | 中国电建集团华东勘测设计研究院有限公司 | A kind of wireless charging device applied to the double loads of electric car |
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