Receiver and system for wireless charging of electric bicycles

Abstract

This application discloses a receiver and system for wireless charging of electric bicycles. The receiver includes a receiving coil, a compensation capacitor C1, a rectifier bridge, a first rectifier diode, a second rectifier diode, a battery, and a load. One end of the receiving coil is connected to one end of the compensation capacitor C1, and the other end is connected to the positive terminal of the first rectifier diode and the first terminal of the rectifier bridge. The other end of the compensation capacitor C1 is connected to the positive terminal of the second rectifier diode and the second terminal of the rectifier bridge. The third terminal of the rectifier bridge is connected to the positive terminal of the battery, and the fourth terminal is connected to the negative terminal of the battery. The negative terminals of the first and second rectifier diodes are connected to the third terminal of the rectifier bridge, and the load is connected between them. This application's wireless charging hardware for electric bicycles is compatible with charging various battery voltages, prevents excessive temperature during charging, and significantly improves efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automotive charging technology, specifically to a receiver and system for wireless charging of electric bicycles. Background Technology

[0002] Electric bicycles are bicycles that use batteries as an auxiliary power source. They are convenient and inexpensive, making them a common mode of transportation for daily commutes. However, due to their small size, electric bicycles can only carry relatively small batteries, resulting in a short driving range. Therefore, they need to be charged frequently. Currently, most electric bicycles are charged using wired charging. Since charging and parking areas are often outdoors or in open parking sheds, they are easily affected by rain. Furthermore, the haphazard placement of multiple charging cables can easily create safety hazards.

[0003] In recent years, with the development of wireless charging technology, wireless charging systems have been widely used in aerospace, underwater vehicles, and electric vehicle charging, among other fields. Wireless charging systems eliminate the need for wired connections between the primary and secondary sides, improving charging safety. However, existing wireless charging methods for electric bicycles tend to cause significant temperature rises and electrical damage. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a receiver and system for wireless charging of electric bicycles.

[0005] The first embodiment of this utility model provides a receiver for wireless charging of an electric bicycle, including a receiving coil, a compensation capacitor C1, a rectifier bridge, a first rectifier diode, a second rectifier diode, a battery, and a load. One end of the receiving coil is connected to one end of the compensation capacitor C1, and the other end is connected to the positive terminal of the first rectifier diode and the first end of the rectifier bridge. The other end of the compensation capacitor C1 is connected to the positive terminal of the second rectifier diode and the second end of the rectifier bridge. The third end of the rectifier bridge is connected to the positive terminal of the battery, and the fourth end is connected to the negative terminal of the battery. The negative terminals of the first and second rectifier diodes are connected to the third end of the rectifier bridge, and the load is connected between them.

[0006] Optionally, it also includes a filter capacitor C2, one end of which is connected to the fourth terminal of the rectifier bridge, and the other end is connected to the third terminal of the rectifier bridge.

[0007] Optionally, it also includes an inductor L1, one end of which is connected to one end of the filter capacitor C2 and the fourth terminal of the rectifier bridge, and the other end of the inductor L1 is connected to the positive terminal of the battery.

[0008] Optionally, it also includes a filter capacitor C3, one end of which is connected to the positive terminal of the battery and the other end of which is connected to the negative terminal of the battery.

[0009] Optionally, it also includes a filter capacitor C4, one end of which is connected to the third terminal of the rectifier bridge, and the other end is connected to the negative terminal of the first rectifier diode and the negative terminal of the second rectifier diode.

[0010] Optionally, it also includes a fuse, one end of which is connected to the negative terminal of the first rectifier diode and the negative terminal of the second rectifier diode, and the other end is connected to the other end of the filter capacitor C4.

[0011] Optionally, the system also includes a DC-DC converter, wherein the first terminal of the DC-DC converter is connected to the negative terminal of the first rectifier diode and the negative terminal of the second rectifier diode, and the second and third terminals are respectively connected to the load.

[0012] Optionally, the load includes a wireless communication module and an MCU, which are respectively connected to the second and third terminals of the DC-DC converter.

[0013] The second embodiment of this utility model provides a system for wireless charging of electric bicycles, which further includes the receiving end for wireless charging of electric bicycles as described in any of the above-mentioned embodiments.

[0014] In the technical solution provided by this utility model embodiment, the charging circuit for the battery and the control circuit for the MCU are each powered separately after coil coupling. The charging circuit is rectified by rectifier bridge D1 and then directly to the battery through inductor L1. The power supply for the control circuit is separately rectified by the first rectifier diode D2 and the second rectifier diode D3 in a half-bridge, and then stepped down to 3V by a DC-DC converter to power the MCU and wireless communication module. The hardware of this application for wireless charging of electric bicycles is compatible with charging many battery voltages. Moreover, because the DC-DC converter reduces the voltage, the temperature will not be too high during the charging process, and the efficiency is greatly improved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a wireless charging receiver for an electric bicycle according to the present invention. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] It should be noted that the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0018] Please refer to Figure 1 As shown, this utility model provides a receiver for wireless charging of an electric bicycle, including a receiving coil, a compensation capacitor C1, a rectifier bridge D1, a first rectifier diode D2, a second rectifier diode D3, a battery, and a load. One end of the receiving coil is connected to one end of the compensation capacitor C1, and the other end is connected to the positive terminal of the first rectifier diode D2 and the first terminal of the rectifier bridge D1. The other end of the compensation capacitor C1 is connected to the positive terminal of the second rectifier diode D3 and the second terminal of the rectifier bridge D1. The third terminal of the rectifier bridge D1 is connected to the positive terminal of the battery, and the fourth terminal is connected to the negative terminal of the battery. The load is connected between the negative terminals of the first rectifier diode D2 and the second rectifier diode D3 and the third terminal of the rectifier bridge D1.

[0019] In one embodiment of this utility model, it further includes a filter capacitor C2, an inductor L1, and a filter capacitor C3. One end of the filter capacitor C2 is connected to the fourth terminal of the rectifier bridge D1, and the other end is connected to the third terminal of the rectifier bridge D1. One end of the inductor L1 is connected to one end of the filter capacitor C2 and the fourth terminal of the rectifier bridge D1, and the other end of the inductor L1 is connected to the positive terminal of the battery and one end of the filter capacitor C3. One end of the filter capacitor C3 is also connected to the positive terminal of the battery, and the other end is connected to the negative terminal of the battery.

[0020] In one embodiment of the present invention, a filter capacitor C4 is further included. One end of the filter capacitor C4 is connected to the third terminal of the rectifier bridge D1, and the other end is connected to the negative terminal of the first rectifier diode D2 and the negative terminal of the second rectifier diode D3.

[0021] In one embodiment of this utility model, a fuse P1 is also included. One end of the fuse P1 is connected to the negative terminal of the first rectifier diode D2 and the negative terminal of the second rectifier diode D3, and the other end is connected to the other end of the filter capacitor C4.

[0022] In one embodiment of the present invention, a DC-DC converter is further included. The first terminal of the DC-DC converter is connected to the negative terminal of the first rectifier diode D2 and the negative terminal of the second rectifier diode D3, and the second and third terminals are respectively connected to the load.

[0023] In one embodiment of this utility model, the load includes a wireless communication module and an MCU. The wireless communication module can be, for example, 2.4G / wireless. The wireless communication module and the MCU are respectively connected to the second and third terminals of the DC-DC converter. Specifically, the first terminal of the DC-DC converter is connected to the fuse P1, the second terminal is connected to the third terminal of the rectifier bridge D1, the wireless communication module, the first terminal of the MCU, and the negative terminal of the battery, and the third terminal of the DC-DC converter is connected to the second terminal of the wireless communication module and the MCU.

[0024] In this application, the charging circuit for the battery and the control circuit for the MCU are powered separately after being coupled from the coil. The charging circuit is rectified by the rectifier bridge and then directly connected to the battery through the inductor L1. The power supply for the control circuit is separately rectified by the first rectifier diode D2 and the second rectifier diode D3 in a half-bridge, and then stepped down to 3V by the DC-DC converter to power the MCU and the wireless communication module.

[0025] This utility model also provides a wireless charging system for electric bicycles. The system includes a transmitter and a receiver. The receiver includes a receiving coil, a compensation capacitor C1, a rectifier bridge D1, a first rectifier diode D2, a second rectifier diode D3, a battery, and a load. One end of the receiving coil is connected to one end of the compensation capacitor C1, and the other end is connected to the positive terminal of the first rectifier diode D2 and the first terminal of the rectifier bridge D1. The other end of the compensation capacitor C1 is connected to the positive terminal of the second rectifier diode D3 and the second terminal of the rectifier bridge D1. The third terminal of the rectifier bridge D1 is connected to the positive terminal of the battery, and the fourth terminal is connected to the negative terminal of the battery. The load is connected between the negative terminals of the first rectifier diode D2 and the second rectifier diode D3 and the third terminal of the rectifier bridge.

[0026] The system also includes the receiving end shown in any of the above embodiments. In this application, the charging circuit for the battery and the control circuit for the MCU are each powered separately after being coupled from the coil. The charging circuit is rectified by the rectifier bridge D1 and then directly connected to the battery through the inductor L1. The power supply for the control circuit is separately rectified by the first rectifier diode D2 and the second rectifier diode D3 in a half-bridge, and then stepped down to 3V by the DC-DC converter to power the MCU and the wireless communication module.

[0027] This utility model's charging receiver is equipped with a DC-DC converter to reduce the voltage. For different battery voltages, the transmitting end adjusts the constant current and constant voltage for charging. This circuit allows for a single hardware solution suitable for wireless charging of electric bicycles, adapting to a wide range of battery voltages. Furthermore, because the DC-DC converter reduces the voltage, the temperature during charging will not become excessively high, and the efficiency is greatly improved.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A receiver for wireless charging of an electric bicycle, characterized in that, The device includes a receiving coil, a compensation capacitor C1, a rectifier bridge, a first rectifier diode, a second rectifier diode, a battery, and a load. One end of the receiving coil is connected to one end of the compensation capacitor C1, and the other end is connected to the positive terminal of the first rectifier diode and the first end of the rectifier bridge. The other end of the compensation capacitor C1 is connected to the positive terminal of the second rectifier diode and the second end of the rectifier bridge. The third end of the rectifier bridge is connected to the positive terminal of the battery, and the fourth end is connected to the negative terminal of the battery. The load is connected between the negative terminals of the first and second rectifier diodes and the third end of the rectifier bridge.

2. The receiver for wireless charging of electric bicycles according to claim 1, characterized in that, It also includes a filter capacitor C2, one end of which is connected to the fourth terminal of the rectifier bridge, and the other end is connected to the third terminal of the rectifier bridge.

3. The receiver for wireless charging of electric bicycles according to claim 2, characterized in that, It also includes an inductor L1, one end of which is connected to one end of the filter capacitor C2 and the fourth end of the rectifier bridge, and the other end of the inductor L1 is connected to the positive terminal of the battery.

4. The receiver for wireless charging of electric bicycles according to claim 2, characterized in that, It also includes a filter capacitor C3, one end of which is connected to the positive terminal of the battery and the other end is connected to the negative terminal of the battery.

5. The receiver for wireless charging of electric bicycles according to claim 1, characterized in that, It also includes a filter capacitor C4, one end of which is connected to the third terminal of the rectifier bridge, and the other end is connected to the negative terminals of the first rectifier diode and the second rectifier diode, respectively.

6. The receiver for wireless charging of electric bicycles according to claim 5, characterized in that, It also includes a fuse, one end of which is connected to the negative terminal of the first rectifier diode and the negative terminal of the second rectifier diode, and the other end of which is connected to the other end of the filter capacitor C4.

7. The receiver for wireless charging of electric bicycles according to claim 1, characterized in that, It also includes a DC-DC converter, wherein the first terminal of the DC-DC converter is connected to the negative terminal of the first rectifier diode and the negative terminal of the second rectifier diode, and the second and third terminals are respectively connected to the load.

8. The receiver for wireless charging of electric bicycles according to claim 7, characterized in that, The load includes a wireless communication module and an MCU, which are respectively connected to the second and third terminals of the DC-DC converter.

9. A wireless charging system for electric bicycles, characterized in that, It includes a transmitter and a receiver for wireless charging of electric bicycles as described in any one of claims 1-8.

Images