CN-114421645-B - Double-sided multiplexing wireless charging coupling mechanism and double-load wireless power transmission system

CN114421645BCN 114421645 BCN114421645 BCN 114421645BCN-114421645-B

Abstract

The invention relates to the technical field of wireless power transmission, and particularly discloses a double-sided multiplexing wireless charging coupling mechanism and a double-load wireless power transmission system, wherein the coupling mechanism comprises a transmitting end device, a first energy receiving coil (13) and a second energy receiving coil (14); the transmitting end device is of a coil double-sided multiplexing structure and comprises a first energy transmitting coil (11) arranged on the front side and a second energy transmitting coil (12) arranged on the back side, the first energy transmitting coil (11) and the first energy receiving coil (13) are both single-pole coils, the second energy transmitting coil (12) and the second energy receiving coil (14) are both bipolar coils, double-sided multiplexing of the energy transmitting coils is achieved, the two energy receiving coils are mutually decoupled and cannot interfere with each other, the double-sided multiplexing energy transmitting coil structure can be popularized to a multi-load application scene, and wireless charging can be achieved for more loads on the premise that the size of the transmitting coil is not increased.

Inventors

TANG CHUNSEN
WANG ZHIHUI
LI XIAOFEI
JIANG CHENG
WANG SONGCEN
XU LI
WU XIAOKANG
LIU JIANMIN
LIU JUNXU

Assignees

重庆大学
中国电力科学研究院有限公司
国网山东省电力公司烟台供电公司

Dates

Publication Date: 20260505
Application Date: 20220124

Claims (9)

1. The wireless charging coupling mechanism for double-sided multiplexing is characterized by comprising a transmitting end device, a first receiving end device and a second receiving end device; The transmitting end device is of a coil double-sided multiplexing structure and comprises a first energy transmitting coil (11) arranged on the front side and a second energy transmitting coil (12) arranged on the back side; The first receiving end device comprises a first energy receiving coil (13) opposite to and coupled with the first energy transmitting coil (11), and the second receiving end device comprises a second energy receiving coil (14) opposite to and coupled with the second energy transmitting coil (12); The first energy transmitting coil (11) and the first energy receiving coil (13) are monopole coils, the second energy transmitting coil (12) and the second energy receiving coil (14) are bipolar coils, and the first energy receiving coil (13) and the second energy receiving coil (14) are mutually decoupled; the first energy transmitting coil (11) and the second energy transmitting coil (12) are respectively wound by two wires, so that the first energy transmitting coil (11) and the second energy transmitting coil (12) are not connected, the first receiving end device or the second receiving end device is arranged on the inspection robot, and the control flow of the transmitting end device comprises the following steps: S1, detecting whether a patrol robot stops at a first charging position opposite to a first energy transmitting coil (11) or a second charging position opposite to a second energy transmitting coil (12), if so, entering the next step, and if not, continuing to detect; S2, executing steps S3-S4 if only the first charging position is parked with the inspection robot, executing steps S5-S6 if only the second charging position is parked with the inspection robot, and executing steps S7-S8 if the first charging position and the second charging position are parked with the inspection robot at the same time; S3, detecting that a secondary side energy receiving coil on the inspection robot is a single-pole coil or a bipolar coil through primary and secondary side communication, if the secondary side energy receiving coil is the single-pole coil, starting a first energy transmitting coil (11) to perform wireless charging, and if the secondary side energy receiving coil is the bipolar coil, entering the next step; s4, prompting the inspection robot to switch to a second charging position opposite to the second energy transmitting coil (12), and starting the second energy transmitting coil (12); S5, detecting that a secondary side energy receiving coil on the inspection robot is a single-pole coil or a bipolar coil through primary and secondary side communication, if the secondary side energy receiving coil is the bipolar coil, starting a second energy transmitting coil (12) to perform wireless charging, and if the secondary side energy receiving coil is the single-pole coil, entering the next step; S6, prompting the inspection robot to switch to a first charging position opposite to the first energy transmitting coil (12), and starting the first energy transmitting coil (11); s7, detecting whether secondary side energy receiving coils of the inspection robot at the first charging position and the second charging position are a single-pole coil and a double-pole coil or not through primary and secondary side communication, if so, starting a first energy transmitting coil (11) and a second energy transmitting coil (12) to perform wireless charging at the same time, and if not, entering the next step; S8, if the first charging position and the second charging position are both monopolar coils, only the first energy transmitting coil (11) is started, and the inspection robot in the second charging position is prompted to find the charging position of the next transmitting end device, and if the first charging position and the second charging position are both bipolar coils, only the second energy transmitting coil (12) is started, and the inspection robot in the first charging position is prompted to find the charging position of the next transmitting end device.
2. The double-sided multiplexing wireless charging coupling mechanism of claim 1, wherein the first energy transmitting coil (11) and the second energy transmitting coil (12) are vertically arranged and have equal length and equal height, the second energy transmitting coil (12) is formed by connecting two energy transmitting sub-coils distributed up and down in series, and the exciting current directions of the two energy transmitting sub-coils are opposite.
3. The double-sided multiplexing wireless charging coupling mechanism according to claim 2, wherein the first energy receiving coil (13) and the second energy receiving coil (14) are vertically arranged, the second energy receiving coil (14) is formed by connecting two energy receiving sub-coils distributed up and down in series, and the induction current directions of the two energy receiving sub-coils are opposite.
4. The double-sided multiplexing wireless charging coupling mechanism according to claim 3, wherein the length and the height of the first energy transmitting coil (11) are respectively equal to or greater than the length and the height of the first energy receiving coil (13), and the length and the height of the second energy transmitting coil (12) are respectively equal to or greater than the length and the height of the second energy receiving coil (14).
5. The double-sided multiplexing wireless charging coupling mechanism according to claim 1, wherein the first energy receiving coil (13), the second energy receiving coil (14), the first energy transmitting coil (11) and the second energy transmitting coil (12) are wound with at least two turns of coils.
6. A dual load wireless power transfer system, comprising: the device comprises a primary side power transmitting circuit, a first secondary side power receiving circuit and a second secondary side power receiving circuit; The primary side electric energy transmitting circuit comprises a power supply, a full-bridge inverter, a primary side resonance compensation network and a primary side transmitting coil which are sequentially connected, wherein the primary side transmitting coil adopts the transmitting end device as claimed in any one of claims 1 to 5; the first secondary side electric energy receiving circuit comprises a first secondary side receiving coil, a first secondary side resonance compensation network, a first rectifying and filtering circuit and a first load which are sequentially connected, wherein the first secondary side receiving coil adopts the first receiving end device as claimed in any one of claims 1 to 5; The second secondary power receiving circuit includes a second secondary receiving coil, a second secondary resonance compensation network, a second rectifying and filtering circuit, and a second load, which are sequentially connected, wherein the second secondary receiving coil adopts the second receiving terminal device according to any one of claims 1 to 5.
7. The dual-load wireless power transfer system of claim 6, wherein the primary resonance compensation network employs a first LCC compensation network.
8. The dual-load wireless power transfer system of claim 7, wherein the first secondary side resonance compensation network employs a second LCC compensation network.
9. The dual-load wireless power transfer system of claim 7, wherein the second secondary resonant compensation network employs a third LCC compensation network.

Description

Double-sided multiplexing wireless charging coupling mechanism and double-load wireless power transmission system Technical Field The invention relates to the technical field of wireless power transmission, in particular to a double-sided multiplexing wireless charging coupling mechanism and a double-load wireless power transmission system. Background The wireless power transmission (Wireless Power Transfer, WPT) technology provides a thought for solving the problem of power supply of safe, reliable, flexible and convenient electric equipment. At present, the single-input single-output WPT technology is relatively mature and is widely applied to the fields of electric automobile charging, unmanned equipment charging, implanted medical equipment and the like. The multi-load WPT system is a system with only one primary side power transmitting part and multiple secondary side power receiving parts, can realize non-contact power supply of one power supply to multiple electric equipment, has wider and wider application for the utilization rate of a transmitting coil to be higher than that of a single-input single-output WPT system. The current multi-load WPT system mostly uses a group of larger transmitting coils and a plurality of groups of smaller receiving coil structures, or utilizes a multi-stage relay coil to supply power to a plurality of loads, so that multi-output is realized while the energy transmission distance is increased, but the two modes have limited utilization rate of the energy transmitting coils and have weak offset resistance. Disclosure of Invention The invention provides a double-sided multiplexing wireless charging coupling mechanism and a double-load wireless power transmission system, which solve the technical problems that the utilization rate of an energy transmitting coil in the existing multi-load WPT system is limited and the offset resistance is not strong. In order to solve the technical problems, the invention firstly provides a wireless charging coupling mechanism with double-sided multiplexing, which comprises a transmitting end device, a first receiving end device and a second receiving end device; The transmitting end device is of a coil double-sided multiplexing structure and comprises a first energy transmitting coil arranged on the front side and a second energy transmitting coil arranged on the back side; The first receiving end device comprises a first energy receiving coil opposite to and coupled with the first energy transmitting coil, and the second receiving end device comprises a second energy receiving coil opposite to and coupled with the second energy transmitting coil; the first energy transmitting coil and the first energy receiving coil are monopole coils, the second energy transmitting coil and the second energy receiving coil are bipolar coils, and the first energy receiving coil and the second energy receiving coil are decoupled from each other. Preferably, the first energy transmitting coil and the second energy transmitting coil are vertically arranged and have equal length and equal height, and the second energy transmitting coil is formed by connecting two energy transmitting sub-coils distributed up and down in series, and the exciting current directions of the two energy transmitting sub-coils are opposite. The first energy receiving coil and the second energy receiving coil are vertically arranged, the second energy receiving coil is formed by connecting two energy receiving sub-coils distributed up and down in series, and the induction current directions of the two energy receiving sub-coils are opposite. Preferably, the length and the height of the first energy transmitting coil are respectively greater than or equal to the length and the height of the first energy receiving coil, and the length and the height of the second energy transmitting coil are respectively greater than or equal to the length and the height of the second energy receiving coil. Preferably, the first energy transmitting coil and the second energy transmitting coil are wound by the same wire, so that the first energy transmitting coil and the first energy transmitting coil are in a series connection relationship, or the first energy transmitting coil and the second energy transmitting coil are respectively wound by two wires, so that the first energy transmitting coil and the first energy transmitting coil are not connected. Preferably, the first energy receiving coil, the second energy receiving coil, the first energy transmitting coil and the second energy transmitting coil are all wound with at least two turns of coils. Based on the above coupling mechanism, the present invention further provides a dual-load wireless power transmission system, comprising: the device comprises a primary side power transmitting circuit, a first secondary side power receiving circuit and a second secondary side power receiving circuit; The primary side electric energy transmitting circuit co