Battery-free electric power-assisted bicycle system with USB interface

Abstract

The utility model discloses a battery-free electric power-assisted bicycle system with a universal serial bus (USB) interface. Comprising a USB interface input module, a charging protocol control and charging state indication module, a constant current / constant voltage DC power converter module, a charging isolator D, a starting module, a brushless motor BLDC driving controller module, a power-assisted bicycle multifunctional instrument module, a speed / torque sensor module and a brushless motor M, the output end of the USB interface input module is electrically connected with the input end of the charging protocol control and charging state indication module, and the output end of the charging protocol control and charging state indication module is electrically connected with the input end of the constant current / constant voltage DC power converter module; according to the USB interface input module, the USB standard TYPE-C interface is used for externally providing energy for the power-assisted bicycle, the starting module can provide instant starting energy through the Farad capacitor, and the safety problem that an electric power-assisted bicycle is provided with a battery is solved.

Description

Technical Field

[0001] This utility model relates to the field of electric bicycle technology, specifically to an electric bicycle system with a USB interface and no battery. Background Technology

[0002] A power-assisted bicycle is a mode of transportation that combines traditional bicycles with modern electric technology. It uses an electric motor and battery pack to provide auxiliary power, making riding easier and more convenient, especially when facing uphill climbs or long distances, significantly reducing the rider's physical exertion. The basic structure of a power-assisted bicycle includes a motor, typically mounted in the middle of the frame (mid-mounted motor) or in the rear wheel hub (hub motor). The mid-mounted motor is connected to the frame and then to the rear wheel via a chain, allowing the rider to pedal manually. Even without a power source, the rider can still pedal manually, with resistance no different from a normal bicycle.

[0003] An electric-assisted bicycle system, such as one with application number CN201620117557.8 and authorization announcement date of 20160622, includes an electric-assisted bicycle, a locking device, and a station controller. The electric-assisted bicycle includes a motor, a battery, an intelligent controller, and a multi-functional connector. The multi-functional connector includes a first charging contact and a first communication contact. The intelligent controller is connected to both the battery and the motor. The first charging contact and the first communication contact are both connected to the battery. This electric-assisted bicycle system provides low-voltage power charging services to the battery of the electric-assisted bicycle. When the electric-assisted bicycle is locked on the locking device, the controller detects the battery level. If the level is insufficient, it controls the charger to charge the battery. The system features fully automatic intelligent control and uploads the charging data to a backend server for unified management and maintenance.

[0004] Currently, most electric bicycles on the market are based on lithium batteries. The lithium batteries are located inside the bicycle. Due to the high discharge rate, there are a series of safety, cost, and charging management issues related to battery pack grouping, battery management system (BMS), data monitoring and communication. Therefore, there is an urgent need to design an electric bicycle system with a USB interface and no battery to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a battery-free electric-assist bicycle system with a USB interface to address the aforementioned shortcomings of the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A battery-free electric-assist bicycle system with a USB interface includes a USB interface input module, a charging protocol control and charging status indication module, a constant current / constant voltage DC power converter module, a charging unidirectional converter D, a starter module, a brushless motor BLDC drive controller module, an electric-assist bicycle multi-function instrument module, a speed / torque sensor module, and a brushless motor M. The system is characterized in that the output terminal of the USB interface input module is electrically connected to the input terminal of the charging protocol control and charging status indication module; the output terminal of the charging protocol control and charging status indication module is electrically connected to the input terminal of the constant current / constant voltage DC power converter module; the output terminal of the constant current / constant voltage DC power converter module is electrically connected to the input terminal of the charging unidirectional converter D; the output terminal of the charging unidirectional converter D is electrically connected to the input terminal of the starter module; the output terminal of the starter module is electrically connected to the input terminal of the brushless motor BLDC drive controller module; and the output terminal of the brushless motor BLDC drive controller module is electrically connected to the input terminals of the electric-assist bicycle multi-function instrument module, the speed / torque sensor module, and the brushless motor M.

[0008] The starting module is a series supercapacitor group, and charging and discharging are controlled by the same port. The voltage of the starting module must meet the drive voltage and current energy requirements of the brushless motor BLDC drive controller module. The starting module and the constant current / constant voltage DC power converter module are connected in parallel. The starting module and the constant current / constant voltage DC power converter module simultaneously provide energy to the brushless motor BLDC drive controller module.

[0009] Furthermore, the USB interface input module adopts a TYPE-C USB interface, and the USB interface input module has a PD protocol that can provide 65-140W of energy. The USB interface input module is used to receive energy from the USBPD protocol energy unit and to provide energy for the startup module.

[0010] Furthermore, the charging protocol control and charging status indication module includes PD protocol communication function, capacitor current charging control function, and indicator light function.

[0011] Furthermore, the constant current / constant voltage DC power converter module can convert the voltage and power output by the USB interface input module, the charging protocol control and charging status indication module into the charging voltage and current required for the startup module. The constant current / constant voltage DC power converter module controls the charging current of the startup module according to the current control signal of the charging protocol control and charging status indication module.

[0012] Furthermore, the charging unidirectional converter D is a charging diode, and the constant current / constant voltage DC power converter module has unidirectional conductivity.

[0013] Furthermore, the brushless motor BLDC drive controller module is used to receive energy transmitted by the starter module. The brushless motor BLDC drive controller module can receive signals collected by the speed / torque sensor. The brushless motor BLDC drive controller module and the multi-functional instrument module for power-assisted bicycles are used to identify the power assist gear and speed control, and can also display the status of the brushless motor BLDC drive controller to the instrument in real time.

[0014] Furthermore, the multi-functional instrument module of the electric bicycle is used to display the operating status data of the electric bicycle. The multi-functional instrument module of the electric bicycle sends gear information to the brushless motor BLDC drive controller module. The speed / torque sensor module is used to identify the pedaling speed and force of the human body and control the output power of the motor through the BLDC drive controller.

[0015] In the above technical solution, the present invention provides a battery-free electric-assist bicycle system with a USB interface, which has the following advantages:

[0016] (1) The USB interface input module of this utility model uses the USB standard TYPE-C interface to provide power to the electric bicycle, and the starting module can provide instantaneous starting energy through the farad capacitor, thus solving the safety problem of electric bicycles with batteries.

[0017] (2) The electric bicycle of this utility model does not have a battery inside. The energy of the electric bicycle comes from the USBTYPE-C interface, which can be a lithium battery pack with a low rate, a lead-acid battery pack, a hydrogen energy battery pack, a solar cell pack, etc. As long as it conforms to the USBTYPE-CPD charging protocol and has the PD65-140W protocol, it can provide energy for the electric bicycle and meet the power energy requirements of the electric bicycle. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the system structure of an embodiment of an electric-assisted bicycle system with a USB interface and no battery, according to the present invention. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1 As shown in the figure, this utility model provides a battery-free electric-assist bicycle system with a USB interface, including a USB interface input module, a charging protocol control and charging status indication module, a constant current / constant voltage DC power converter module, a charging unidirectional converter D, a starter module, a brushless motor BLDC drive controller module, an electric-assist bicycle multi-function instrument module, a speed / torque sensor module, and a brushless motor M. The system is characterized in that the output terminal of the USB interface input module is electrically connected to the input terminal of the charging protocol control and charging status indication module; the output terminal of the charging protocol control and charging status indication module is electrically connected to the input terminal of the constant current / constant voltage DC power converter module; the output terminal of the constant current / constant voltage DC power converter module is electrically connected to the input terminal of the charging unidirectional converter D; the output terminal of the charging unidirectional converter D is electrically connected to the input terminal of the starter module; the output terminal of the starter module is electrically connected to the input terminal of the brushless motor BLDC drive controller module; and the output terminal of the brushless motor BLDC drive controller module is electrically connected to the input terminals of the electric-assist bicycle multi-function instrument module, the speed / torque sensor module, and the brushless motor M.

[0022] Specifically, this embodiment includes a USB interface input module, a charging protocol control and charging status indication module, a constant current / constant voltage DC power converter module, a charging unidirectional converter D, a start-up module, a brushless motor BLDC drive controller module, a multi-functional instrument module for electric bicycles, a speed / torque sensor module, and a brushless motor M. The output terminal of the USB interface input module is electrically connected to the input terminal of the charging protocol control and charging status indication module; the output terminal of the charging protocol control and charging status indication module is electrically connected to the input terminal of the constant current / constant voltage DC power converter module; the output terminal of the constant current / constant voltage DC power converter module is electrically connected to the input terminal of the charging unidirectional converter D; the output terminal of the charging unidirectional converter D is electrically connected to the input terminal of the start-up module; the output terminal of the start-up module is electrically connected to the input terminal of the brushless motor BLDC drive controller module; and the output terminal of the brushless motor BLDC drive controller module is electrically connected to the input terminals of the multi-functional instrument module for electric bicycles, the speed / torque sensor module, and the brushless motor M.

[0023] The starting module is a series supercapacitor group. Charging and discharging are controlled by the same port. The voltage of the starting module must meet the drive voltage and current energy requirements of the brushless motor BLDC drive controller module. The starting module and the constant current / constant voltage DC power converter module are connected in parallel. The starting module and the constant current / constant voltage DC power converter module simultaneously provide energy to the brushless motor BLDC drive controller module.

[0024] It should be noted that the motor energy = energy of the constant current / constant voltage DC power converter + energy of the starting module capacitor; the energy of the starting module capacitor = starting module capacitor capacity C * voltage change across the capacitor E = 1 / 2CVV.

[0025] This utility model provides a battery-free electric-assist bicycle system with a USB interface. The USB interface input module uses a standard USB Type-C interface to provide power to the electric-assist bicycle externally, and the starter module can provide instantaneous starting energy through a farad capacitor, thus solving the safety problem of electric-assist bicycles with batteries.

[0026] In one embodiment of this utility model, the USB interface input module adopts a TYPE-C USB interface, and the USB interface input module has a PD protocol that can provide 65-140W of energy. The USB interface input module is used to receive energy from the USB PD protocol energy unit and to provide energy for the startup module. The charging protocol control and charging status indication module includes PD protocol communication function, capacitor current charging control function and indicator light function.

[0027] It should be noted that the PD protocol communication function can send communication protocols, allowing the USB interface input module to output the rated voltage and lock the voltage output, providing energy to the constant current / constant voltage DC power converter.

[0028] Based on communication with the USB interface input module, the constant current / constant voltage DC power converter module simultaneously provides output current to the startup module; allowing the USB interface input module and the constant current / constant voltage DC power converter module to charge the startup module capacitor according to protocol requirements;

[0029] When the module starts charging, the current of the charging protocol control and charging status indicator module is used to determine whether the starting module capacitor is fully charged. The status indicator light is red when charging and green when fully charged.

[0030] In another embodiment of this utility model, the constant current / constant voltage DC power converter module can convert the voltage and power output by the USB interface input module, the charging protocol control and charging status indication module into the charging voltage and current required for the startup module. The constant current / constant voltage DC power converter module controls the charging current of the startup module according to the current control signal of the charging protocol control and charging status indication module.

[0031] It should be noted that the constant current / constant voltage DC power converter module can support constant voltage charging with a startup module voltage of 24V, 36V, or 48V.

[0032] In another embodiment of this utility model, the charging unidirectional converter D is a charging diode, and the constant current / constant voltage DC power converter module has unidirectional conductivity; the brushless motor BLDC drive controller module is used to receive energy transmitted by the starting module, and the brushless motor BLDC drive controller module can receive signals collected by the speed / torque sensor. The brushless motor BLDC drive controller module and the multi-functional instrument module for power-assisted bicycles are used to identify the power-assisted gear and speed control, and can also display the status of the brushless motor BLDC drive controller to the instrument in real time; the multi-functional instrument module for power-assisted bicycles is used to display the operating status data of the power-assisted bicycle, and sends gear information to the brushless motor BLDC drive controller module. The speed / torque sensor module is used to identify the pedaling speed and force of the human body, and controls the output power of the motor through the BLDC drive controller.

[0033] Example 1

[0034] A battery-free electric-assist bicycle system with a USB interface includes a USB interface input module, a charging protocol control and charging status indication module, a constant current / constant voltage DC power converter module, a charging unidirectional converter D, a starter module, a brushless motor BLDC drive controller module, an electric-assist bicycle multi-function instrument module, a speed / torque sensor module, and a brushless motor M. The system is characterized in that the output terminal of the USB interface input module is electrically connected to the input terminal of the charging protocol control and charging status indication module; the output terminal of the charging protocol control and charging status indication module is electrically connected to the input terminal of the constant current / constant voltage DC power converter module; the output terminal of the constant current / constant voltage DC power converter module is electrically connected to the input terminal of the charging unidirectional converter D; the output terminal of the charging unidirectional converter D is electrically connected to the input terminal of the starter module; the output terminal of the starter module is electrically connected to the input terminal of the brushless motor BLDC drive controller module; and the output terminal of the brushless motor BLDC drive controller module is electrically connected to the input terminals of the electric-assist bicycle multi-function instrument module, the speed / torque sensor module, and the brushless motor M.

[0035] The starting module is a series supercapacitor group. Charging and discharging are controlled by the same port. The voltage of the starting module must meet the drive voltage and current energy requirements of the brushless motor BLDC drive controller module. The starting module and the constant current / constant voltage DC power converter module are connected in parallel. The starting module and the constant current / constant voltage DC power converter module simultaneously provide energy to the brushless motor BLDC drive controller module.

[0036] Example 2

[0037] This embodiment further defines the features of Embodiment 1. Specifically, the USB interface input module uses a Type-C USB interface and has a PD protocol capability, providing 65-140W of energy. The USB interface input module receives energy from the USB PD protocol unit and provides energy to the startup module. The charging protocol control and charging status indication module includes PD protocol communication, capacitor current charging control, and indicator light functions. The constant current / constant voltage DC power converter module converts the voltage and power output from the USB interface input module and the charging protocol control and charging status indication module into the charging voltage and current required by the startup module. The constant current / constant voltage DC power converter module controls the charging of the startup module based on the current control signal from the charging protocol control and charging status indication module. Current; the charging unidirectional converter D uses a charging diode, and the constant current / constant voltage DC power converter module has unidirectional conductivity; the brushless motor BLDC drive controller module is used to receive energy transmitted from the starting module. The brushless motor BLDC drive controller module can receive signals collected by the speed / torque sensor. The brushless motor BLDC drive controller module and the multi-function instrument module for power-assisted bicycles are used to identify the power-assisted gear and speed control, and can also display the status of the brushless motor BLDC drive controller to the instrument in real time; the multi-function instrument module for power-assisted bicycles is used to display the operating status data of the power-assisted bicycle, and sends gear information to the brushless motor BLDC drive controller module. The speed / torque sensor module is used to identify the pedaling speed and force of the user, and controls the output power of the motor through the BLDC drive controller.

[0038] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A battery-free electric-assist bicycle system with a USB interface, comprising a USB interface input module, a charging protocol control and charging status indication module, a constant current / constant voltage DC power converter module, a charging unidirectional converter D, a starter module, a brushless motor BLDC drive controller module, an electric-assist bicycle multi-function instrument module, a speed / torque sensor module, and a brushless motor M, characterized in that, The output terminal of the USB interface input module is electrically connected to the input terminal of the charging protocol control and charging status indication module. The output terminal of the charging protocol control and charging status indication module is electrically connected to the input terminal of the constant current / constant voltage DC power converter module. The output terminal of the constant current / constant voltage DC power converter module is electrically connected to the input terminal of the charging unidirectional converter D. The output terminal of the charging unidirectional converter D is electrically connected to the input terminal of the start-up module. The output terminal of the start-up module is electrically connected to the input terminal of the brushless motor BLDC drive controller module. The output terminal of the brushless motor BLDC drive controller module is electrically connected to the input terminals of the power-assisted bicycle multi-function instrument module, the speed / torque sensor module, and the brushless motor M. The starting module is a series supercapacitor group, and charging and discharging are controlled by the same port. The voltage of the starting module must meet the drive voltage and current energy requirements of the brushless motor BLDC drive controller module. The starting module and the constant current / constant voltage DC power converter module are connected in parallel. The starting module and the constant current / constant voltage DC power converter module simultaneously provide energy to the brushless motor BLDC drive controller module.

2. The battery-free electric-assist bicycle system with a USB interface according to claim 1, characterized in that, The USB interface input module uses a TYPE-C USB interface and has a PD protocol that can provide 65-140W of energy. The USB interface input module is used to receive energy from the USBPD protocol and to provide energy to the startup module.

3. The battery-free electric-assist bicycle system with a USB interface according to claim 1, characterized in that, The charging protocol control and charging status indication module includes PD protocol communication function, capacitor current charging control function and indicator light function.

4. The battery-free electric-assist bicycle system with a USB interface according to claim 1, characterized in that, The constant current / constant voltage DC power converter module can convert the voltage and power output from the USB interface input module, charging protocol control and charging status indication module into the charging voltage and current required for the startup module. The constant current / constant voltage DC power converter module controls the charging current of the startup module according to the current control signal of the charging protocol control and charging status indication module.

5. A battery-free electric-assist bicycle system with a USB interface according to claim 1, characterized in that, The charging unidirectional converter D is a charging diode, and the constant current / constant voltage DC power converter module has unidirectional conductivity.

6. A battery-free electric-assist bicycle system with a USB interface according to claim 1, characterized in that, The brushless motor BLDC drive controller module is used to receive energy transmitted by the starter module. The brushless motor BLDC drive controller module can receive signals collected by the speed / torque sensor. The brushless motor BLDC drive controller module and the multi-functional instrument module for power-assisted bicycles are used to identify the power assist gear and speed control, and can also display the status of the brushless motor BLDC drive controller to the instrument in real time.

7. The battery-free electric-assist bicycle system with a USB interface according to claim 1, characterized in that, The multi-functional instrument module of the electric bicycle is used to display the operating status data of the electric bicycle. The multi-functional instrument module of the electric bicycle sends gear information to the brushless motor BLDC drive controller module. The speed / torque sensor module is used to identify the pedaling speed and force of the human body and control the output power of the motor through the BLDC drive controller.

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