Power recovery system and method for electric power-assisted bicycle
Patent Information
- Application Number
- CN202480005761.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-02-28
- Filing Date
- 2024-02-28
- Publication Date
- 2025-07-25
AI Technical Summary
Existing electric-assisted bicycles fail to effectively utilize kinetic energy and potential energy when braking and decelerating, resulting in a waste of energy.
Using a power recovery system, including a power device, a sensing device and a control device, it generates a reverse charging command by detecting the status information of the electric power-assisted bicycle and the user's control information, and controls the motor module to switch from the driving state to the reverse charging state. The power is recovered into the energy storage module to realize power recovery.
It effectively avoids the energy waste of electric power-assisted bicycles when braking, improves energy utilization and reduces heat energy loss.
Smart Images
Figure CN120379890A_ABST
Abstract
Description
Power recovery system and method for electric-assisted bicycle Technical Field
[0001] The present application relates to the technical field of electric-assisted bicycles, and in particular to a power recovery system and method for electric-assisted bicycles. Background Art
[0002] Existing electric-assisted bicycles use a hybrid "human + electric" drive system to provide assistance when going uphill, against headwinds, and while carrying cargo, allowing users to ride longer and farther. However, this only converts human energy and battery power into the bicycle's kinetic and potential energy. When the user brakes to slow down, the bicycle's kinetic and potential energy is not effectively utilized and is converted into heat energy through friction during braking, resulting in energy waste.
[0003] Summary of the Invention
[0004] Based on this, in order to solve the problem of energy waste in electric-assisted bicycles in some cases, a power recovery system and method for an electric-assisted bicycle are provided.
[0005] An embodiment of the present application provides a power recovery system for an electric-assisted bicycle, comprising: a power device, including a motor module and an energy storage module connected to the motor module; a sensor device, for detecting status information of the electric-assisted bicycle; a control device, for receiving status information detected by the sensor device and control information from the user, and sending a control command to the power device based on at least one of the status information and the control information, wherein the control command includes a reverse charging command.
[0006] In one embodiment, the control command further includes a braking command, and the braking command is used to control the electric-assisted bicycle to decelerate.
[0007] In one embodiment, the mechanical brake module and the motor module are used together to brake the electric-assisted bicycle.
[0008] In one embodiment, the sensing device includes at least one of a cadence sensor, a wheel speed sensor, and a torque sensor.
[0009] In one embodiment, the motor module includes an electronic speed regulator, which is used to switch the working state of the motor in the motor module according to a control command.
[0010] In one embodiment, switching the working state of the motor in the motor module according to the control command includes:
[0011] After receiving the reverse charging command, the electronic speed regulator controls the motor in the motor module to switch from a driving state to a reverse charging state.
[0012] In one embodiment, controlling the motor in the motor module to switch from a driving state to a reverse charging state includes:
[0013] The electronic speed regulator controls the motor to switch from a driving state in which the three-phase electric drive rotor rotates to a reverse charging state in which the rotor rotation generates a reverse current.
[0014] In one embodiment, the user's control information includes braking information, and sending a control command to the power device according to at least one of the status information and the control information includes:
[0015] Send a reverse charging command to the power unit based on the braking information.
[0016] In one embodiment, the status information includes wheel speed, and sending a control command to the power unit based on at least one of the status information and the control information includes:
[0017] When the wheel speed exceeds a preset maximum wheel speed, a reverse charging command is sent to the power unit.
[0018] In one embodiment, the control information includes switching the working mode to the spinning mode, and sending a control command to the power device according to at least one of the status information and the control information includes:
[0019] When the electric-assisted bicycle receives an instruction from the user to switch the working mode to the spinning mode, a reverse charging command is sent to the power device.
[0020] In one embodiment, the status information includes the vehicle moving speed and the wheel speed, and sending the control command to the power device according to at least one of the status information and the control information includes:
[0021] When the wheel speed is inconsistent with the vehicle's moving speed within a preset time, a control command is sent to the power unit to adjust the power recovery power and the braking capacity so that the wheel speed returns to the same level as the vehicle's moving speed.
[0022] In one embodiment, sending a control command to the power device according to at least one of the status information and the control information includes:
[0023] When the wheel speed is greater than zero and is lower than the vehicle moving speed within a preset time, a control command is sent to the power unit to reduce the power recovery power and reduce the braking capacity.
[0024] On the other hand, an embodiment of the present application further provides a power recovery method for an electric-assisted bicycle, comprising:
[0025] receiving status information of the electric-assisted bicycle detected by a sensor device and control information of the user;
[0026] Sending a control command to a power device according to at least one of the status information and the control information, wherein the power device includes a motor module and an energy storage module connected to the motor module;
[0027] The motor module reversely charges the energy storage module according to the control command.
[0028] In one embodiment, the control information includes at least one of speed setting information, direction setting information, mode setting information, braking information, and pedaling information.
[0029] In one embodiment, the status information includes at least one of cadence information, wheel speed information, and torque information.
[0030] In one embodiment, the motor module includes an electronic speed regulator, and the motor module reversely charges the energy storage module according to a control command, including:
[0031] After receiving the control command, the electronic speed regulator controls the motor in the motor module to switch from the driving state to the reverse charging state.
[0032] In one embodiment, controlling the motor in the motor module to switch from a driving state to a reverse charging state includes:
[0033] The electronic speed regulator controls the motor to switch from a driving state in which the three-phase electric drive rotor rotates to a reverse charging state in which the rotor rotation generates a reverse current.
[0034] In one embodiment, the user's control information includes braking information, and sending a control command to the power device according to at least one of the status information and the control information includes:
[0035] Send a reverse charging command to the power unit based on the braking information.
[0036] In one embodiment, the status information includes wheel speed, and sending a control command to the power unit based on at least one of the status information and the control information includes:
[0037] When the wheel speed exceeds a preset maximum wheel speed, a reverse charging command is sent to the power unit.
[0038] In one embodiment, the control information includes switching the working mode to the spinning mode, and sending a control command to the power device according to at least one of the status information and the control information includes:
[0039] When the electric-assisted bicycle receives an instruction from the user to switch the working mode to the spinning mode, a reverse charging command is sent to the power device.
[0040] In one embodiment, the power device further includes a mechanical braking module, and the power recovery method further includes:
[0041] The motor module and the mechanical brake module control the electric power-assisted bicycle to brake according to the control command.
[0042] In one embodiment, the status information includes the vehicle moving speed and the wheel speed, and sending the control command to the power device according to at least one of the status information and the control information includes:
[0043] When the wheel speed is inconsistent with the vehicle's moving speed within a preset time, a control command is sent to the power unit to adjust the power recovery power and the braking capacity so that the wheel speed returns to the same level as the vehicle's moving speed.
[0044] In one embodiment, sending a control command to the power device according to at least one of the status information and the control information includes:
[0045] When the wheel speed is greater than zero and is lower than the vehicle moving speed within a preset time, a control command is sent to the power unit to reduce the power recovery power and reduce the braking capacity.
[0046] The power recovery system and method for an electric-assisted bicycle provided in an embodiment of the present application include a power device, a sensor device and a control device. The power device includes a motor module, an energy storage module connected to the motor module and a mechanical brake module. The sensor device is used to detect status information of the electric-assisted bicycle. The control device serves as the control center of the electric-assisted bicycle, and is used to receive status information of the electric-assisted bicycle and control information from the user, and generate a control command after comprehensively calculating the above information. The control command includes a reverse charging command. After the power device receives the control command, the motor module in the power device reversely charges the energy storage module in the power device according to the control command, thereby achieving the purpose of power recovery and avoiding energy waste. BRIEF DESCRIPTION OF THE DRAWINGS
[0047] One or more embodiments are exemplarily illustrated by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.
[0048] FIG1 is a schematic structural block diagram of a power recovery system for an electric-assisted bicycle provided in an embodiment of the present application;
[0049] FIG2 is a schematic structural block diagram of another power recovery system for an electric-assisted bicycle provided in an embodiment of the present application;
[0050] FIG3 is a schematic flow chart of a power recovery method for an electric-assisted bicycle provided in an embodiment of the present application. DETAILED DESCRIPTION
[0051] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the specific implementation methods of the embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the embodiments of the present application. However, the embodiments of the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotations of the embodiments of the present application. Therefore, the embodiments of the present application are not limited by the specific embodiments disclosed below.
[0052] In the description of the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.
[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the embodiments of the present application, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise clearly specified.
[0054] In the embodiments of the present application, unless otherwise specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediate medium; internal connections between two components, or interactions between two components, unless otherwise specified. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.
[0055] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0056] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.
[0057] Generally speaking, an electric-assisted bicycle is a new type of transportation and cargo vehicle that uses a motor to assist human pedaling. The motor directly controls the mechanical transmission, acting on the pedaling force of the vehicle to complete the conversion of electrical energy into kinetic energy, and is the ultimate tool for providing auxiliary power. The module that provides kinetic energy to the motor is generally an energy storage module. When the motor is in the driving working state, the energy storage module provides kinetic energy to the motor. The energy storage module can be a battery module or other external energy supply module, which is not limited in this application.
[0058] Example 1:
[0059] Figure 1 is a schematic block diagram of a power recovery system for an electric-assisted bicycle according to an embodiment of the present application. As shown in Figure 1 , a power recovery system 10 for an electric-assisted bicycle comprises: a power unit 11 comprising a motor module 110, an energy storage module 111 connected to the motor module 110, and a mechanical brake module 112; a sensor device 12 for detecting status information of the electric-assisted bicycle; and a control device 13 for receiving status information detected by the sensor device 12 and user control information, and sending control commands to the power unit 11 based on at least one of the status information and the control information. The control commands may include reverse charging commands.
[0060] Among them, the motor module 110 in the power device 11 is connected to the energy storage module 111. The motor module 110 includes a driving state and a reverse charging state. When it is in the driving state, the energy storage module 111 can charge the motor module 110 to provide electrical energy so that it is always in the driving state; when the motor module 110 is in the reverse charging state, the motor module 110 can reverse charge the energy storage module 111 and recover power to the energy storage module 111. Generally, the energy storage module 111 can be a battery or other energy storage device, and this application does not limit this. The sensor device 12 is used to detect the status information of the electric assisted bicycle, and can include at least one sensor selected from the group consisting of a cadence sensor, a wheel speed sensor, and a torque sensor. The control device 13, serving as the control center of the electric-assisted bicycle, mainly calculates control commands based on the status information of the electric-assisted bicycle detected by the sensor device 12 and the user's control information, and then sends control commands to the power device 11. The control commands include reverse charging commands, that is, after the power device 11 receives the control commands, it controls the motor module 110 to reversely charge the energy storage module 111, thereby achieving the purpose of power recovery.
[0061] In one embodiment, as shown in Figure 2, the power device 11 also includes a mechanical brake module 112. The mechanical brake module 112 and the motor module 110 can be used together to brake the electric-assisted bicycle, and the braking capacity of the mechanical brake module 112 can be adjusted by the control device 13 based on the status information of the electric-assisted bicycle detected by the sensor device 12 and the user's control information.
[0062] In a further embodiment, the control device 13 adjusts the braking capacity of the mechanical brake module 112 to a preset value, so that the same control amount of mechanical brake input can produce a larger or smaller braking force. The greater the braking capacity, the shorter the stopping distance, and vice versa.
[0063] In one embodiment, the control command also includes a braking command, which mainly controls the deceleration of the electric-assisted bicycle. The braking of the electric-assisted bicycle generally includes motor braking and wheel braking. In the embodiment of the present application, the control command includes a reverse charging command and a braking command, that is, on the one hand, the motor module 110 is controlled to reverse charge the energy storage module 111, thereby achieving the purpose of power recovery, and on the other hand, a braking command is sent to the motor module 110 to control the motor module 110 and the mechanical brake module 112 to achieve the purpose of braking.
[0064] In one embodiment, the motor module 110 includes an electronic speed regulator, which is used to switch the working state of the motor in the motor module 110 according to a control command. The working state of the motor includes a driving state and a reverse charging state. The electronic speed regulator serves as the control center in the motor module 110. After receiving the control command of the control device 13, it can adjust the working state of the motor according to the control command. For example, when switching from the driving state to the reverse charging state, the purpose of power recovery can be achieved.
[0065] Furthermore, the electronic speed regulator switches the working state of the motor in the motor module 110 according to the control command, including: after the electronic speed regulator receives the reverse charging command, it controls the motor in the motor module 110 to switch from the driving state to the reverse charging state, thereby achieving the purpose of power recovery.
[0066] Furthermore, controlling the motor in the motor module 110 to convert from a driving state to a reverse charging state includes the electronic speed regulator controlling the motor to switch from a driving state in which the three-phase electric drive rotor rotates to a reverse charging state in which a reverse current is generated by the rotor rotation, thereby achieving the purpose of power recovery.
[0067] In one embodiment, the user's control information includes braking information, and sending a control command to the power device 11 based on at least one of the status information and the control information includes: sending a reverse charging command to the power device 11 based on the braking information. Specifically, when the user presses the brake handle, the brake handle will transmit the pressing amplitude signal to the control device 13, and the control device 13 will send a reverse charging command to the power device 11. After receiving the reverse charging command, the motor module 110 in the power device 11 switches from the driving working state to the reverse charging working state. It should be understood that the electronic speed regulator in the motor module 110 can also control the power recovery power of the motor according to the pressing amplitude of the brake handle, thereby controlling the braking resistance of the motor. The greater the pressing amplitude of the brake handle, the greater the power recovery power of the motor, the greater the braking resistance of the motor, the faster the wheel decelerates, and the more power is recovered; when the user completely releases the brake handle, the control device 13 notifies the electronic speed regulator to switch the working state of the motor to the driving state.
[0068] In one embodiment, the status information includes wheel speed, and sending a control command to the power unit 11 based on at least one of the status information and the control information includes: sending a reverse charging command to the power unit 11 when the wheel speed exceeds a preset maximum wheel speed. Specifically, when the wheel speed exceeds the preset maximum wheel speed, the control unit 13 sends a reverse charging command to the power unit 11. Upon receiving the reverse charging command, the motor module 110 in the power unit 11 switches from a driving mode to a reverse charging mode. Furthermore, if the bicycle wheel speed continuously increases due to factors such as downhill driving or pedaling, the control unit 13 automatically increases or decreases the motor's power recovery power based on the change in wheel speed, automatically maintaining the bicycle's wheel speed at the preset maximum wheel speed. When the bicycle wheel speed decreases and falls below the preset maximum wheel speed, the control unit 13 controls the electronic speed regulator to switch the motor's operating mode to a driving mode.
[0069] In one embodiment, the status information includes vehicle speed and wheel rotational speed. Sending a control command to the power unit 11 based on at least one of the status information and the control information includes: when the wheel rotational speed is inconsistent with the vehicle speed for a preset time, sending a control command to the power unit 11 to adjust the regenerative power and braking capacity so that the wheel rotational speed returns to the same level as the vehicle speed. Furthermore, when the wheel rotational speed is greater than zero and less than the vehicle speed for a preset time, sending a control command to the power unit 11 to reduce the regenerative power and braking capacity. Specifically, pressing the brake lever will generate less regenerative power and less mechanical braking force. Furthermore, when the wheel speed is about to decrease to zero and the vehicle speed is greater than the wheel rotational speed, the control unit 13 will reduce the regenerative power and mechanical braking capacity to zero, ensuring that the bicycle maintains rotation and prevents loss of control. When the wheel rotational speed returns to the vehicle speed, the control unit 13 will control the sending of a command to restore the braking capacity, returning the regenerative power and mechanical braking force generated by pressing the brake lever to the preset levels.
[0070] In one embodiment, the control information includes switching the working mode to the spinning mode, and sending a control command to the power device 11 according to at least one of the status information and the control information includes: when the electric-assisted bicycle receives the user's instruction to switch the working mode to the spinning mode, sending a reverse charging command to the power device 11. Specifically, when the user sets the working mode of the electric-assisted bicycle to the spinning mode, the control device 13 sends a reverse charging command to the power device 11. After the motor module 110 in the power device 11 receives the reverse charging command, it switches from the driving working state to the reverse charging working state. When in the spinning mode, the power recovered by the motor and the maximum wheel speed are set by the user. At this time, the motor at the front wheel of the electric-assisted bicycle will be locked, and the rear wheel will be raised and fixed by the accessories. The user can drive the rear wheel to rotate when pedaling.
[0071] In one embodiment, when both the front and rear wheels are braking and the power recovery system 10 is used, if the braking deceleration of the front wheels is greater than the braking deceleration of the rear wheels, the control device 13 will adjust the power of the front and rear wheel power recovery so that the braking deceleration of the front wheels is less than or equal to the braking deceleration of the rear wheels, thereby avoiding safety issues such as rollover during braking.
[0072] In one embodiment, when both the front and rear wheels are braking, and only the front wheels use the power recovery system 10, if the braking deceleration of the front wheels is greater than the braking deceleration of the rear wheels, the control device 13 will adjust the power of the front wheel power recovery so that the braking deceleration of the front wheels is less than or equal to the braking deceleration of the rear wheels, thereby avoiding safety issues such as rollover during braking.
[0073] In an embodiment of the present application, a power recovery system for an electric-assisted bicycle is provided, including a power device, a sensor device and a control device. The power device includes a motor module, an energy storage module connected to the motor module and a mechanical brake module. The sensor device is used to detect status information of the electric-assisted bicycle. The control device serves as the control center of the electric-assisted bicycle, and is used to receive status information of the electric-assisted bicycle and control information from the user, and generates a control command after comprehensively calculating the above information. The control command includes a reverse charging command. After receiving the control command, the power device executes the reverse charging command to achieve the purpose of power recovery and avoid energy waste.
[0074] Example 2:
[0075] The following describes a power recovery method for an electric-assisted bicycle according to another embodiment of the present application in conjunction with Figure 3. The power recovery method for an electric-assisted bicycle according to the embodiment of the present application is performed by the power recovery system 10 in the above embodiment. Figure 3 shows a schematic flow chart of the power recovery method for an electric-assisted bicycle according to the embodiment of the present application. As shown in Figure 3, the power recovery method for an electric-assisted bicycle includes the following steps:
[0076] S21, receiving status information of the electric-assisted bicycle detected by a sensor device and control information of the user;
[0077] S22. Sending a control command to a power device according to at least one of the state information and the control information, wherein the power device includes a motor module and an energy storage module connected to the motor module;
[0078] S23. The motor module in the power device reversely charges the energy storage module in the power device according to the control command.
[0079] In an embodiment of the present application, the control device 13 serves as the control center of the electric-assisted bicycle, and is used to receive status information of the electric-assisted bicycle detected by the sensor device 12 and control information of the user, wherein the status information includes at least one of the cadence information, wheel speed information, and torque information detected by the sensor device, and the control information includes at least one of the speed setting information, direction setting information, mode setting information, braking information, and pedaling information; then, based on at least one of the status information and the control information, a control command is sent to the power device 11 of the electric-assisted bicycle, and the motor module 110 in the power device 11 reversely charges the energy storage module 111 in the power device 11 according to the control command, thereby achieving the purpose of power recovery.
[0080] In the embodiment of the present application, as described in the above embodiment, the control device 13 serves as the control center of the electric-assisted bicycle. It mainly calculates the control command based on the status information of the electric-assisted bicycle detected by the sensor device 12 and the user's control information, and then sends the control command to the power device 11. The control command includes a reverse charging command, that is, after the power device 11 receives the control command, it controls the motor module 110 to reversely charge the energy storage module 111, thereby achieving the purpose of power recovery.
[0081] In one embodiment, the motor module 110 includes an electronic speed regulator. Step S23, wherein the motor module in the power device reversely charges the energy storage module in the power device according to the control command, specifically includes:
[0082] After receiving the control command, the electronic speed regulator controls the motor in the motor module 110 to switch from the driving state to the reverse charging state.
[0083] Furthermore, in one embodiment, controlling the motor in the motor module 110 to switch from the driving state to the reverse charging state specifically includes:
[0084] The electronic speed regulator controls the motor to switch from a driving state in which the three-phase electric drive rotor rotates to a reverse charging state in which the rotor rotation generates a reverse current.
[0085] In one embodiment, the user's control information includes braking information, and step S22 specifically includes sending a control command to the power device based on at least one of the status information and the control information: sending a reverse charging command to the power device based on the braking information. Specifically, when the user presses the brake handle, the brake handle will transmit the pressing amplitude signal to the control device 13, and the control device 13 will send a reverse charging command to the power device 11. After receiving the reverse charging command, the motor module 110 in the power device 11 switches from the driving working state to the reverse charging working state. It should be understood that the electronic speed regulator in the motor module 110 can also control the power recovery power of the motor according to the pressing amplitude of the brake handle, thereby controlling the braking resistance of the motor. The greater the pressing amplitude of the brake handle, the greater the power recovery power of the motor, the greater the braking resistance of the motor, the faster the wheel decelerates, and the more power is recovered; when the user completely releases the brake handle, the control device 13 notifies the electronic speed regulator to switch the working state of the motor to the driving state.
[0086] In one embodiment, the status information includes wheel speed. Step S22, which sends a control command to the power unit based on at least one of the status information and the control information, specifically includes: when the wheel speed exceeds a preset maximum wheel speed, sending a reverse charging command to the power unit. Specifically, when the wheel speed exceeds the preset maximum wheel speed, the control unit 13 sends a reverse charging command to the power unit 11. Upon receiving the reverse charging command, the motor module 110 in the power unit 11 switches from a driving state to a reverse charging state. Furthermore, if the bicycle wheel speed increases continuously due to factors such as downhill driving or pedaling, the control unit 13 automatically increases or decreases the motor's power recovery power based on the change in wheel speed, automatically maintaining the bicycle's wheel speed at the preset maximum wheel speed. When the bicycle wheel speed decreases and falls below the preset maximum wheel speed, the control unit 13 controls the electronic speed regulator to switch the motor's operating state to a driving state.
[0087] In one embodiment, the control information includes switching the working mode to the spinning mode, and step S22 sends a control command to the power device according to at least one of the status information and the control information, specifically including: when the electric-assisted bicycle receives the user's instruction to switch the working mode to the spinning mode, sending a reverse charging command to the power device. Specifically, when the user sets the working mode of the electric-assisted bicycle to the spinning mode, the control device 13 sends a reverse charging command to the power device 11. After the motor module 110 in the power device 11 receives the reverse charging command, it switches from the driving working state to the reverse charging working state. When in the spinning mode, the power recovered by the motor power and the maximum wheel speed are set by the user. At this time, the motor at the front wheel of the electric-assisted bicycle will be locked, and the rear wheel will be raised and fixed by the accessories. The user can drive the rear wheel to rotate when pedaling.
[0088] In one embodiment, the power unit 11 further includes a mechanical brake module 112. The motor module 110 and the mechanical brake module 112 control the electric-assisted bicycle to achieve braking according to control commands. Specifically, the mechanical brake module 112 and the motor module 110 can be used together to brake the electric-assisted bicycle, and the braking capacity of the mechanical brake module 112 can be adjusted by the control device 13 based on the status information of the electric-assisted bicycle detected by the sensor device 12 and the control information of the user.
[0089] In one embodiment, the status information includes vehicle speed and wheel rotational speed. Sending a control command to the power unit 11 based on at least one of the status information and the control information includes: when the wheel rotational speed is inconsistent with the vehicle speed for a preset time, sending a control command to the power unit 11 to adjust the regenerative power and braking capacity so that the wheel rotational speed returns to the same level as the vehicle speed. Furthermore, when the wheel rotational speed is greater than zero and less than the vehicle speed for a preset time, sending a control command to the power unit 11 to reduce the regenerative power and braking capacity. Specifically, pressing the brake lever will generate less regenerative power and less mechanical braking force. Furthermore, when the wheel speed is about to decrease to zero and the vehicle speed is greater than the wheel rotational speed, the control unit 13 will reduce the regenerative power and mechanical braking capacity to zero, ensuring that the bicycle maintains rotation and prevents loss of control. When the wheel rotational speed returns to the vehicle speed, the control unit 13 will control the sending of a command to restore the braking capacity, returning the regenerative power and mechanical braking force generated by pressing the brake lever to the preset levels.
[0090] In one embodiment, when both the front and rear wheels are braking and the power recovery system 10 is engaged, if the difference between the front and rear wheel braking decelerations is greater than a preset threshold, the control device 13 adjusts the power of the front and rear wheel power recovery so that the front wheel braking deceleration is less than or equal to the rear wheel braking deceleration, thereby avoiding safety issues such as rollover during braking. Furthermore, the preset threshold of the adjustable difference is not less than zero.
[0091] In one embodiment, when both the front and rear wheels are braking, and only the front wheels are utilizing the power recovery system 10, if the difference between the front and rear wheel braking decelerations is greater than a preset threshold, the control device 13 adjusts the front wheel power recovery power so that the front wheel braking deceleration is less than or equal to the rear wheel braking deceleration, thereby preventing safety issues such as rollover during braking. Furthermore, the preset threshold for the adjustable difference is not less than zero.
[0092] In an embodiment of the present application, a power recovery method for an electric-assisted bicycle is provided, which receives status information of the electric-assisted bicycle detected by a sensor device and control information of the user, and sends a control command to a power device based on at least one of the status information and the control information. The motor module in the power device reversely charges the energy storage module in the power device according to the control command, thereby achieving the purpose of power recovery and avoiding energy waste.
[0093] The above content is a further detailed description of the present application in conjunction with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For those skilled in the art, various modifications and improvements can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application.
Claims
1. A power recovery system for an electric power-assisted bicycle, It is characterized in that include: A power device, comprising a motor module and an energy storage module connected to the motor module; A sensor device, used for detecting status information of the electric-assisted bicycle; A control device is used to receive the state information detected by the sensor device and the user's control information, and send a control command to the power device according to at least one of the state information and the control information, wherein the control command includes a reverse charging command.
2. The power recovery system according to claim 1, It is characterized in that The control command also includes a braking command, and the braking command is used to control the electric-assisted bicycle to decelerate.
3. The power recovery system according to claim 1, It is characterized in that The sensor device includes at least one of a cadence sensor, a wheel speed sensor, and a torque sensor.
4. The power recovery system according to claim 1, It is characterized in that The motor module includes an electronic speed regulator, and the electronic speed regulator is used to switch the working state of the motor in the motor module according to the control command.
5. The power recovery system according to claim 4, It is characterized in that Switching the working state of the motor in the motor module according to the control command includes: After receiving the reverse charging command, the electronic speed regulator controls the motor in the motor module to switch from a driving state to a reverse charging state.
6. The method according to claim 5, It is characterized in that The controlling the motor in the motor module to convert from a driving state to a reverse charging state comprises: The electronic speed regulator controls the motor to switch from a driving state in which the three-phase electric drive rotor rotates to a reverse charging state in which a reverse current is generated by the rotor rotation.
7. The power recovery system according to claim 1, It is characterized in that The user's control information includes brake information, and sending a control command to the power device according to at least one of the state information and the control information includes: The reverse charging command is sent to the power device according to the braking information.
8. The power recovery system according to claim 1, It is characterized in that The state information includes wheel speed, and sending a control command to the power device according to at least one of the state information and the control information includes: When the wheel speed exceeds a preset maximum wheel speed, the reverse charging command is sent to the power device.
9. The power recovery system according to claim 1, It is characterized in that The control information includes switching the working mode to the spinning bike mode, and sending a control command to the power device according to at least one of the state information and the control information includes: When the electric-assisted bicycle receives an instruction from a user to switch the working mode to the spinning bicycle mode, the reverse charging command is sent to the power device.
10. The power recovery system according to any one of claims 1 to 9, It is characterized in that The power device also includes a mechanical brake module, and the mechanical brake module and the motor module are used together for braking the electric-assisted bicycle.
11. The power recovery system according to claim 10, It is characterized in that The state information includes the vehicle moving speed and the wheel speed, and sending a control command to the power device according to at least one of the state information and the control information includes: When the wheel speed is inconsistent with the vehicle moving speed within a preset time, a control command for adjusting the power recovery power and adjusting the braking capacity is sent to the power device so that the wheel speed returns to the same level as the vehicle moving speed.
12. The power recovery system according to claim 11, It is characterized in that The sending of a control command to the power device according to at least one of the state information and the control information comprises: A control command is sent to the power device to reduce the power recovery power and reduce the braking capacity.
13. A power recovery method for an electric power-assisted bicycle, It is characterized in that include: Receiving status information of the electric-assisted bicycle and control information of the user detected by a sensor device; Sending a control command to the power device according to at least one of the state information and the control information, wherein the power device includes a motor module and an energy storage module connected to the motor module; The motor module reversely charges the energy storage module according to the control command.
14. The method according to claim 13, It is characterized in that The control information includes at least one of speed setting information, direction setting information, mode setting information, brake information, and pedaling information.
15. The method of claim 13, It is characterized in that The state information includes at least one of cadence information, wheel speed information, and torque information.
16. The method of claim 13, It is characterized in that The motor module includes an electronic speed regulator, and the motor module reversely charges the energy storage module according to the control command, including: After receiving the control command, the electronic speed regulator controls the motor in the motor module to switch from a driving state to a reverse charging state.
17. The method of claim 16, It is characterized in that The controlling the motor in the motor module to convert from a driving state to a reverse charging state comprises: The electronic speed regulator controls the motor to switch from a driving state in which the three-phase electric drive rotor rotates to a reverse charging state in which a reverse current is generated by the rotor rotation.
18. The method of claim 13, It is characterized in that The user's control information includes brake information, and sending a control command to the power device according to at least one of the state information and the control information includes: The reverse charging command is sent to the power device according to the braking information.
19. The method of claim 13, It is characterized in that The state information includes wheel speed, and sending a control command to the power device according to at least one of the state information and the control information includes: When the wheel speed exceeds a preset maximum wheel speed, the reverse charging command is sent to the power device.
20. The method of claim 13, It is characterized in that The control information includes switching the working mode to the spinning bike mode, and sending a control command to the power device according to at least one of the state information and the control information includes: When the electric-assisted bicycle receives an instruction from a user to switch the working mode to the spinning bicycle mode, the reverse charging command is sent to the power device.
21. The method according to any one of claims 13 to 20, It is characterized in that The power plant further includes a mechanical brake module, and the method further includes: The motor module and the mechanical brake module control the motor according to the control command. Power-assisted bicycle braking.
22. The method of claim 21, It is characterized in that The state information includes the vehicle moving speed and the wheel speed, and sending a control command to the power device according to at least one of the state information and the control information includes: When the wheel speed is inconsistent with the vehicle moving speed within a preset time, a control command for adjusting power recovery power and braking capacity is sent to the power device to make the wheel speed return to the same level as the vehicle moving speed.
23. The method of claim 22, It is characterized in that The sending of a control command to the power device according to at least one of the state information and the control information comprises: When the wheel speed is greater than zero and is lower than the vehicle moving speed within a preset time, a control command for reducing the power recovery power and reducing the braking capacity is sent to the power device.