CN112277670A

CN112277670A - Intelligent wireless charging device of electric bicycle

Info

Publication number: CN112277670A
Application number: CN202011257948.7A
Authority: CN
Inventors: 李建贵; 陈晨; 聂辉; 朱郭福; 刘珊; 李强
Original assignee: Wuhan University of Technology WUT
Current assignee: Wuhan University of Technology WUT
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-01-29

Abstract

The utility model discloses an electric bicycle intelligence wireless charging device, this wireless charging device's telescopic bracket (2) set up underground perpendicularly, and linear electric motor (1) control telescopic bracket 2's is flexible, and rotating electrical machines (3) are fixed in telescopic bracket (2) upper end, and shell (6) are connected with the pivot of rotating electrical machines (3), and primary coil (7) set up in shell 6. The wireless charging device position detector (4) is used for measuring the distance from the pedal to the primary coil and the pedal inclination angle. The controller generates control signals for controlling the linear motor (1) and the rotating motor (3) according to signals of the position detector (4), and the linear motor (1) and the rotating motor (3) adjust the telescopic bracket (2) to a proper height according to the control signals and rotate the shell (6) and the primary coil (7) therein to a position parallel to the secondary coil (5). The invention solves the problem of low charging efficiency when the electric bicycle is placed obliquely.

Description

Intelligent wireless charging device of electric bicycle

Technical Field

The invention relates to an intelligent wireless charging device for an electric bicycle.

Background

The wireless charging technology is derived from a wireless electric energy transmission technology, and the charger and the electric equipment are connected without wires because the charger and the electric equipment transmit energy through a magnetic field, so that no conductive contact is exposed. The existing wireless charging technology is mainly applied to the field of low-power charging of mobile phones, tablet computers, notebook computers and the like.

With the advent of the new energy era, electric bicycles are becoming more and more important in daily life. The electric bicycle is powered by the storage battery, has the advantages of no emission pollution, low noise, low maintenance and operation cost and the like, and has incomparable advantages on environmental protection and energy conservation. At present, the existing electric bicycles are charged in a wired mode. The wired charging mode has potential safety hazards such as wire aging, electric leakage and contact spark caused by plugging and unplugging of a socket and the like. Although patent document CN110014890A discloses a wireless charging system for electric bicycles, which avoids the potential safety hazard existing in the traditional wired charging mode and improves the charging safety, the influence of factors such as the placing inclination and the charging distance of the electric bicycles on the charging efficiency is not considered. The charging distance of the wireless charging device in the prior art is fixed, the wireless charging device cannot flexibly adapt to wireless charging of electric bicycles of different models, when a transmitting end and a receiving end have large deviation, the charging efficiency can be obviously reduced, and when high-power electric power is required to be transmitted, investment needs to be increased in the aspects of infrastructure construction and power equipment.

Disclosure of Invention

The invention provides an intelligent wireless charging device for an electric bicycle, which solves the problem that the wireless charging device cannot be flexibly adapted to the wireless charging of electric bicycles of different models due to fixed charging distance.

According to an aspect of the embodiments of the present invention, there is provided an intelligent wireless charging device for an electric bicycle, comprising a linear motor, a telescopic bracket, a rotary motor, a position detector, a housing, a primary coil and a controller, wherein the telescopic bracket is vertically arranged underground, the linear motor is connected with the telescopic bracket to control the telescopic bracket to be telescopic in a vertical direction, the rotary motor is fixed at the upper end of the telescopic bracket, the housing is connected with a rotating shaft of the rotary motor, the primary coil is horizontally arranged in the housing, the position detector is arranged on the upper surface of the housing to measure a distance and an inclination angle of a housing of the electric bicycle, the housing is provided with a secondary coil, the controller generates a control signal for controlling the linear motor and the rotary motor according to a signal of the position detector, and the linear motor and the rotary motor adjust the telescopic bracket to a set height according to the control signal, and rotating the housing and the primary coil therein to a position parallel to the secondary coil on the electric bicycle.

The position of the primary coil of the wireless charging device can be adjusted according to different types of electric bicycles, so that the primary coil and the secondary coil on the electric bicycle are kept parallel, and the problem of influence on charging efficiency caused by inclination of the electric bicycle is solved. In addition, settle wireless charging device in the underground, reduced area, avoid pedestrian, vehicle accident to bump simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.

Fig. 1 is a schematic view of an intelligent wireless charging device for an electric bicycle according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of relative positions of the intelligent wireless charging device for an electric bicycle and the electric bicycle according to an embodiment of the present invention.

Fig. 3 is a schematic view of an electric bicycle according to an embodiment of the present invention.

Detailed Description

The intelligent wireless charging device for the electric bicycle is arranged underground, so that the land can be saved. The wireless charging device can adjust the height and the angle of the primary coil of the transmitting end according to the position of the electric bicycle above the wireless charging device, so that the primary coil is parallel to the secondary coil on the electric bicycle and keeps a proper distance.

As shown in fig. 1 to 3, the wireless charging device includes a linear motor 1, a telescopic bracket 2, a rotary motor 3, a position detector 4, a housing 6, a primary coil 7, and a controller. The telescopic bracket 2 is vertically arranged underground, and the linear motor 1 is connected with the telescopic bracket 2 to control the telescopic movement of the telescopic bracket. The rotating motor 3 is fixed at the upper end of the telescopic support 2, the shell 6 is connected with a rotating shaft of the rotating motor 3, the primary coil 7 is horizontally arranged in the shell 6, and the shell 6 and the primary coil 7 in the shell are driven to rotate by the rotating motor 3.

The secondary coil 5 in the electric bicycle 4 is horizontally disposed in the housing 9. The position detector 4 is provided on the upper surface of the housing 6 for measuring the distance and the inclination angle of the housing 9 of the electric bicycle, on which the secondary coil 5 is mounted, with respect to the housing 6. The position detector 4 can adopt an ultrasonic displacement sensor, mainly adopts a direct reflection detection mode, and the detected object reflects the acoustic wave signal emitted by the sensor and is received by the sensor probe, so that displacement measurement and position positioning are realized. The ultrasonic displacement sensors are uniformly distributed on the shell 6, emit sound waves to the pedal, receive the sound waves reflected by the machine shell 9, and calculate the vertical distance between the machine shell 9 and the shell 6 by measuring the time difference between the emitted sound waves and the reflected sound waves. If the distances measured by all the ultrasonic displacement sensors are equal, the case 9 is parallel to the shell 6, namely the primary coil 7 at the transmitting end is parallel to the secondary coil 5 at the receiving end; if the distances measured by all the ultrasonic displacement sensors are not equal, the primary coil 7 at the transmitting end is not parallel to the secondary coil 5 at the receiving end, and the relative oblique angle between the primary coil 7 and the secondary coil can be calculated through an angle algorithm.

The signal of the position detector 4 is transmitted to the controller in a wired or wireless mode, the controller generates a control signal for controlling the linear motor 1 and the rotary motor 3 according to the signal of the position detector 4, the linear motor 1 and the rotary motor 3 adjust the telescopic bracket 2 to a proper height according to the control signal, and the shell 6 and the primary coil 7 in the shell rotate to a position parallel to the secondary coil 5.

Both the primary coil 7 and the secondary coil 5 will be wrapped with an insulating material, reducing the interference of environmental factors such as rain. The electric energy of the power grid supplies power to the primary coil 7 through the frequency converter, the secondary coil 5 in the electric bicycle obtains induction electric energy, and the battery is charged after the induction electric energy passes through the rectifier. The whole charging process is controlled by the controller, and after the controller receives a charging request of a user, the wireless charging system is controlled to supply power.

The wireless charging device has a wireless communication function and can transmit data such as voltage, current and temperature in a charging state to monitoring equipment on the electric bicycle in real time. Electric bicycle's monitoring facilities can acquire electric bicycle's battery voltage, charging current, information such as temperature when charging in real time to reach high in the clouds server on with electric bicycle's the state of charge parameter, the high in the clouds server compares electric bicycle's battery state parameter with predetermineeing normal range value, feeds back mobile terminal (like cell-phone, panel computer) with battery state of charge real-time simultaneously, and the car owner can see information such as electric bicycle charging current, voltage, the charge volume on mobile terminal APP.

Claims

1. An intelligent wireless charging device for an electric bicycle, characterized in that it comprises a linear motor (1), a telescopic bracket (2), a rotary motor (3), a position detector (4), a casing (6), a primary coil (7) ) and a controller, the telescopic bracket (2) is vertically arranged on the ground, the linear motor (1) is connected to the telescopic bracket (2) to control its vertical expansion and contraction, and the rotary motor (3) is fixed on the upper end of the telescopic bracket (2) , the casing (6) is connected with the rotating shaft of the rotating motor (3), the primary coil (7) is horizontally arranged in the casing (6), and the position detector (4) is arranged on the upper surface of the casing (6) to measure the number of times the electric bicycle is installed The distance and the inclination angle of the casing (9) of the stage coil (5) relative to the casing (6), the controller generates the control of the linear motor (1) and the rotary motor (3) according to the signal of the position detector (4) signal, the linear motor (1) and the rotary motor (3) adjust the telescopic bracket (2) to the set height according to the control signal, and rotate the casing (6) and the primary coil (7) in it to the same level as the electric bicycle. position of the secondary coil (5) in parallel.

2 . The intelligent wireless charging device for electric bicycles according to claim 1 , wherein the primary coil ( 7 ) is wrapped with insulating material. 3 .

3. The intelligent wireless charging device for electric bicycles according to claim 1, wherein the position detector (4) is an ultrasonic displacement sensor.