CN-115179780-B - Wireless charging system of electric two-wheeled vehicle based on single resonance system

Abstract

The invention relates to a wireless charging system of an electric two-wheeled vehicle based on a single resonance system, which is used for wirelessly charging the electric two-wheeled vehicle (3), and comprises a charging box (1), a magnetic charging structure (2) and the electric two-wheeled vehicle (3), wherein the charging box (1) is used for conveying electric energy to a receiving end circuit of the electric two-wheeled vehicle (3) through the magnetic charging structure (2). Compared with the prior art, the invention has the advantages of small volume, low cost, high alignment precision, stable charging and the like.

Inventors

• JIANG JUN
• LI YUNHUI
• ZHU KEJIA
• LU JIE

Assignees

• 上海卡珀林智能科技有限公司

Dates

Publication Date

20260505

Application Date

20220811

Claims (2)

1. 1. The wireless charging system of the electric two-wheeled vehicle based on the single resonance system is used for wirelessly charging the electric two-wheeled vehicle (3), and is characterized by comprising a charging box (1), a magnetic charging structure (2) and the electric two-wheeled vehicle (3), wherein the charging box (1) is used for conveying electric energy to a receiving end circuit of the electric two-wheeled vehicle (3) through the magnetic charging structure (2); The magnetic charging structure (2) comprises a transmitting end structure (21) and a receiving end structure (22), wherein the transmitting end structure (21) is connected with the charging box (1), and the receiving end structure (22) is arranged on the electric two-wheel vehicle (3) and is connected with a receiving end circuit; The transmitting end structure (21) and the receiving end structure (22) comprise coils for magnetic field coupling and magnets for aligning and adsorbing the coils; One of the coils of the transmitting end structure (21) and the coils of the receiving end structure (22) is a resonance coil, the other coil is a non-resonance coil, and the eigenfrequency of the resonance coil is the single working frequency only of the system; The input alternating current is changed into a high-frequency alternating current signal through a transmitting end circuit and enters a transmitting end resonant coil, then the resonant coil and a receiving end non-resonant coil are subjected to magnetic field coupling, and the coupling strength is k12, or the input alternating current is changed into a high-frequency alternating current signal through the transmitting end circuit and enters the transmitting end non-resonant coil, then the non-resonant coil and the receiving end resonant coil are subjected to magnetic field coupling, and the coupling strength is k12; the transmitting end structure (21) and the receiving end structure (22) are provided with the same disc type shell, and the receiving end structure (22) is positioned below a handlebar of the electric two-wheeled vehicle (3); The transmitting end structure (21) and the receiving end structure (22) both comprise a plurality of block magnets positioned at the periphery of the coils and are used for precisely aligning the transmitting end coil (212) and the receiving end coil (222) during wireless charging, and meanwhile, the transmitting end module and the receiving end module are firmly adsorbed together.
2. 2. The electric two-wheeled vehicle wireless charging system based on the single resonance system according to claim 1, wherein the charging box (1) is connected with the transmitting end structure (21) through a coil wire and a protection wire (4).

Description

Wireless charging system of electric two-wheeled vehicle based on single resonance system Technical Field The invention relates to the field of wireless charging of alternating-current and electric two-wheel vehicles, in particular to an electric two-wheel vehicle wireless charging system based on a single resonance system. Background The electric two-wheeled vehicle is a preferred transportation means for daily travel of people, has small volume and light weight, does not occupy parking spaces and excessive public spaces, is convenient to travel, and can meet travel requirements only by daily charging. In addition, the electric two-wheeled vehicle meets the green environmental protection concept, is beneficial to saving energy and protecting natural environment, and becomes one of the first choice of people for daily travel. However, the charging adapter of the electric two-wheeled vehicle is generally large in size and inconvenient to carry, risks exist for uncertain outdoor environments such as humidity, overheat and corrosion, the electric two-wheeled vehicle is placed indoors to be charged, and the electric two-wheeled vehicle is extremely easy to fire and explode, so that huge potential safety hazards are introduced. Wireless charging technology is now tending to develop and mature, and the charging mode of the electric two-wheel vehicle is gradually affected. Because the convenience and the environmental suitability of wireless charging, the problem is better solved, and the wireless charging of the electric two-wheeled vehicle is also tried on trial and popularized in partial areas, and is continuously improved. However, in the current stage, the electric two-wheeled vehicle is mostly charged by using a charging pile or a wireless charging transmitting end coil paved on the ground, so that the occupied space is large and the cost is high. The charging distance and the horizontal degree of freedom of the wireless charging at present need to be improved, the required alignment precision is higher when the wireless charging is carried out on the electric two-wheeled vehicle in the mode, and the electric two-wheeled vehicle is not located at the designated position or is unstable in parking, so that the wireless charging is unstable, and the wireless charging efficiency is influenced. If the application number is CN 201921431450.0, the application date is 2019.08.30 discloses an electric two-wheeled vehicle wireless charging transmitting device and charging system patent, and the transmitter located in the charging pile is matched with the charging receiver located at the front end of the bicycle basket to carry out wireless charging, so that accurate alignment is needed during charging, and the occupied space of the charging pile is large. In addition, if the electric two-wheeled vehicle is wirelessly charged by using the dual resonance system, severe cleavage of the operating frequency occurs due to the strong near-field coupling. The method has the defects that the charging pile or the transmitting end coil is large in occupied space, the charging pile or the transmitting end coil is high in cost, the charging pile or the transmitting end coil is difficult to align when being charged, the strong coupling frequency splitting problem exists under a double-resonance system, and the double-resonance system is more prone to being interfered by foreign matters than a single-resonance system. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a wireless charging system of an electric two-wheeled vehicle based on a single resonance system. The aim of the invention can be achieved by the following technical scheme: According to a first aspect of the invention, a wireless charging system of an electric two-wheeled vehicle based on a single resonance system is provided, and is used for wirelessly charging the electric two-wheeled vehicle, the charging system comprises a charging box, a magnetic charging structure and the electric two-wheeled vehicle, and the charging box is used for transmitting electric energy to a receiving end circuit of the electric two-wheeled vehicle through the magnetic charging structure. As the preferable technical scheme, the magnetic type charging structure comprises a transmitting end structure and a receiving end structure, wherein the transmitting end structure is connected with the charging box, and the receiving end structure is arranged on the electric two-wheel vehicle and is connected with a receiving end circuit. As a preferable technical scheme, the transmitting end structure and the receiving end structure comprise coils for magnetic field coupling and magnets for aligning and adsorbing the coils. As a preferable technical scheme, one of the coil of the transmitting end structure and the coil of the receiving end structure is a resonance coil, the other coil is a non-resonance coil, and the eigenfrequency of the resonance coil i