Electronic variable-speed power supply system of bicycle

Abstract

The invention discloses a bicycle electronic variable-speed power supply system, which comprises at least one electric device and at least one battery device, and is characterized in that the electric device is connected with the battery device through a power bus and a communication bus; the battery equipment comprises a shell, a battery pack, a control unit and a charging and discharging unit, the battery pack is connected with the control unit through the charging and discharging unit; the acceleration sensor is arranged in the shell; the acceleration sensor is connected with the control unit; when the vehicle is changed from a static state to a moving state, the acceleration sensor generates interruption to wake up the battery device to supply power to the power bus. The power supply system provided by the invention can be provided with a plurality of battery devices, so that the overall endurance time is prolonged; and the acceleration sensor is additionally arranged on the battery equipment, so that the battery equipment can automatically stop supplying power to the system when the battery equipment is static, unnecessary power consumption is reduced, and the service time is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of riding equipment, and in particular to an electronic speed-changing power supply system for a bicycle. Background Art

[0002] The existing bicycle control system needs to deploy more sensors to detect various components of the system and detect and collect data on the user's motion status. Therefore, high requirements are placed on the endurance of the bicycle control system. In addition, when multiple battery devices are connected to the system, there may be voltage differences between different battery devices, which may cause overcurrent problems.

[0003] In summary, it is now necessary to design a bicycle electronic speed-changing power supply system to solve the above problems in the prior art. Summary of the invention

[0004] In order to solve the above problems in the prior art, the present invention provides a bicycle electronic speed-changing power supply system, which can improve the endurance time and avoid the overcurrent problem.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme: A bicycle electronic speed-changing power supply system, comprising: at least one power-consuming device and at least one battery device, The power-consuming device is connected to the battery device via a power bus and a communication bus; The battery device comprises a housing, a battery pack, a control unit and a charge and discharge unit; the battery pack is connected to the control unit via the charge and discharge unit; It also includes an acceleration sensor, which is arranged in the shell; the acceleration sensor is connected to the control unit; when the vehicle changes from a static state to a moving state, the acceleration sensor will generate an interrupt to wake up the battery device and supply power to the power bus.

[0006] In some embodiments of the present invention, a voltage-dividing resistor is connected to the output side of the battery device, and the voltage-dividing resistor is used to implement the insertion detection and charging wake-up functions of the charger.

[0007] In some embodiments of the present invention, the charging and discharging unit includes a first MOS tube and a second MOS tube, both of which use a common source connection as a high-side switch, the first MOS tube is used to control the charging circuit, and the second MOS tube is used to control the discharging circuit; the common source is powered by the control unit through a DC converter.

[0008] In some embodiments of the present invention, when the power supply system includes a plurality of battery devices, the number of battery devices whose charging and discharging units are turned on at the same time is 1.

[0009] In some embodiments of the present invention, the working state of the battery device includes a sleep state, a shutdown state, a wake-up state, an active state and a transport state; in the sleep state, the shutdown state and the transport state, the first MOS tube and the second MOS are both in a shut-down state; in the wake-up state, the first MOS tube is in a shut-down state and the second MOS tube is in an open state; in the active state, the first MOS tube and the second MOS tube are both in an open state.

[0010] In some embodiments of the present invention, when the acceleration sensor sends an interrupt signal to the control unit, the second MOS tube is in the turned-on state, and the control unit is configured to query the power-consuming device and the battery device; when no power-consuming device is queried, the battery device enters a sleep state after a timeout period; when a power-consuming device is queried and the current battery device is the only battery device, the current battery device enters an active state; when a power-consuming device is queried and the current battery device is not the only battery device, the control unit is configured to initiate battery device negotiation and determine the power supply battery device according to the negotiation result.

[0011] In some embodiments of the present invention, when the power system includes multiple battery devices, the initiation conditions of the negotiation instruction include: any of the battery devices enters the awake state from the sleep state, the battery device completes charging, and the battery device is exhausted.

[0012] In some embodiments of the present invention, the negotiation of the battery device includes charging negotiation and discharging negotiation. When the external charger is in a connected state, the control unit performs charging negotiation, otherwise, it performs discharging negotiation.

[0013] In some embodiments of the present invention, the charging negotiation process is: the control unit compares the power levels of the various battery devices and switches the battery device with low power to an active state.

[0014] In some embodiments of the present invention, the process of the discharge negotiation is: the control unit compares the power of each battery device and switches the battery device with a high power to an active state.

[0015] In some embodiments of the present invention, when the power supply system is transported over long distances, the control unit outputs a switching instruction to switch the battery device into the transport state; when the control unit receives an access signal from an external charger, it simultaneously sends an instruction to the battery device to exit the transport state.

[0016] The technical solution of the present invention has the following technical effects compared with the prior art: The power supply system provided by the present invention can be equipped with multiple battery devices, thereby improving the overall battery life; and an acceleration sensor is added to the battery device. When stationary, the battery device will automatically stop supplying power to the system, reducing unnecessary power consumption and extending the use time.

[0017] In addition, the common source design of dual MOS tubes is used for the external output switch in the battery device, which can not only realize the separate control of the charging and discharging circuits, but also solve the charging problem when the battery is completely exhausted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the battery device shown in the embodiment of the present application.

[0020] Figure 2 It is a structural cross-sectional view of the battery device shown in the embodiment of the present application.

[0021] Figure 3 It is a schematic diagram of the structural principle connection of the power supply system shown in the embodiment of the present application.

[0022] Figure 4 The switching process of the working state shown in the embodiment of this application Figure 1 .

[0023] Figure 5 The switching process of the working state shown in the embodiment of this application Figure 2 .

[0024] Figure numerals: 100, housing; 110, base; 120, battery rubber sleeve; 130, connector; 131, mounting groove; 140, sealing structure; 200, battery pack; 300, PCB board; 400, acceleration sensor. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 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 should not be understood as a limitation on the present application.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0028] Reference Figure 1-Figure 3 As shown, a bicycle electronic speed-changing power supply system comprises: at least one power-consuming device and at least one battery device, The power-consuming device is connected to the battery device via a power bus and a communication bus; The battery device includes a housing 100, a battery pack 200, a control unit and a charge and discharge unit; the battery pack 200 is connected to the control unit via the charge and discharge unit; It also includes an acceleration sensor 400, which is arranged in the housing 100; the acceleration sensor 400 is connected to the control unit; when the vehicle changes from a stationary state to a moving state, the acceleration sensor 400 will generate an interrupt to wake up the battery device and supply power to the power bus.

[0029] The electrical equipment is usually a front and rear derailleur, the battery equipment can be a seat tube battery, etc., and each device is connected to a power bus and a communication bus, and the communication bus is a CAN bus.

[0030] In some embodiments of the present invention, reference Figure 1 and Figure 2 As shown, an installation space is formed in the shell 100. In this embodiment, the shell 100 is a cylindrical structure. According to installation requirements, the shell 100 can also be a rectangular column structure or a polygonal column structure.

[0031] The bottom of the shell 100 is provided with a base 110, and the top thereof is provided with a battery rubber sleeve 120; wherein, the base 110 and the battery rubber sleeve 120 are provided with a sealing structure 140 at the installation contact part of the shell 100, and the sealing structure 140 can be an O-ring.

[0032] The battery pack 200 , the control unit and the charge and discharge unit in the battery device are all arranged in the installation space; the control unit and the charge and discharge unit are both integrated on the PCB board 300 .

[0033] Reference Figure 3 As shown, the battery pack 200 includes a battery cell and a protection circuit, and the protection circuit can implement overcurrent protection for the battery cell, etc.

[0034] The battery rubber sleeve 120 is provided with a connector 130, and the connector 130 is provided with a mounting groove 131, and the acceleration sensor 400 is fixed in the mounting groove 131. In this embodiment, the acceleration sensor 400 and the battery pack 200 are installed in the same housing 100. It can accurately sense the motion state of the automatic vehicle, that is, the riding state or the stationary state.

[0035] In addition, an O-ring is provided between the connector 130 and the battery rubber sleeve 120 to achieve a sealing function.

[0036] In some embodiments of the present invention, reference Figure 3 As shown, the control unit is an MCU, which can realize functions such as power detection, charge and discharge behavior control, and CAN communication.

[0037] In some embodiments of the present invention, continue to refer to Figure 3 As shown, a voltage-dividing resistor is connected to the output side of the battery device, and the voltage-dividing resistor is used to implement the insertion detection and charging wake-up functions of the charger.

[0038] In some embodiments of the present invention, the charging and discharging unit includes a first MOS tube and a second MOS tube, both of which use a common source connection as a high-side switch, the first MOS tube is used to control the charging circuit, and the second MOS tube is used to control the discharging circuit; the common source is powered by the control unit through a DC converter.

[0039] Specifically, the first MOS tube and the second MOS tube are both PMOS tubes, that is, P-channel metal oxide semiconductor field effect tubes; when the battery is exhausted, the current at the bus end can supply power to the control unit of the battery device through the body diode of the first MOS tube, thereby realizing the 0V charging function.

[0040] In some embodiments of the present invention, the control unit is also connected to a thermistor, which is used to collect temperature and transmit the temperature data to the control unit for storage. The control unit can send or execute commands such as over-temperature warning based on the temperature data.

[0041] In some embodiments of the present invention, the control unit is connected to the communication bus via a CAN transceiver for receiving and sending signals.

[0042] In some embodiments of the present invention, the acceleration sensor 400 is used to sense the riding state. When the bicycle changes from a stationary state to a moving state, the acceleration sensor 400 generates an interrupt to wake up the battery device and supply power to the power bus, that is, to supply power to various power-consuming devices. At the same time, vibration or bumps during riding will prevent the battery device from entering a dormant state. When the vehicle is stationary, the battery device enters a dormant state and turns off external power supply.

[0043] In some embodiments of the present invention, when the power supply system includes a plurality of battery devices, the number of battery devices whose charging and discharging units are turned on at the same time is 1.

[0044] Specifically, when the battery device is normally charged and discharged, the first MOS tube and the second MOS tube need to be fully turned on to reduce the voltage drop on the circuit and improve the charging and discharging efficiency.

[0045] When there are multiple battery devices on the bus, the charging and discharging units of different battery devices cannot be turned on at the same time, otherwise the high-voltage battery may charge the low-voltage battery. In this state, the charging current is uncontrolled and may exceed the maximum current that the battery can withstand but is not enough to trigger the overcurrent protection of the protection circuit, posing a safety hazard. Therefore, a specific battery device working logic is designed to prevent this from happening.

[0046] The working states of the battery device include a dormant state, a shut-down state, a wake-up state, an active state and a transport state; in the dormant state, the shut-down state and the transport state, the first MOS tube and the second MOS are both in a shut-down state; in the wake-up state, the first MOS tube is in a shut-down state and the second MOS tube is in an open state; in the active state, the first MOS tube and the second MOS tube are both in an open state.

[0047] Specifically, in the dormant state, the first MOS tube and the second MOS tube of the battery device are both turned off, and the battery device cannot be charged or discharged at this time.

[0048] When the battery device is in an active state or awake state, if a timeout occurs, it will switch to a sleep state.

[0049] When the power of the battery device is exhausted, the battery devices in various working states all enter a shutdown state.

[0050] For the transport state, it is necessary to send a CAN command to the power supply device through the control unit, that is, actively switch the power supply device to the transport state.

[0051] In some embodiments of the present invention, when the battery device is in the off state, if the battery device is plugged into a charger, the battery device switches to the awake state.

[0052] In some embodiments of the present invention, in the awake state, the battery device will turn on the external power supply PMOS. At this time, the device can supply power to the outside but cannot be charged.

[0053] In the active state, the battery device will turn on all PMOS, and the device can now supply power to the outside and can also be charged.

[0054] In some embodiments of the present invention, when the acceleration sensor 400 sends an interrupt signal to the control unit, the second MOS tube is in the on state, and the control unit is configured to query the power-consuming device and the battery device; when any power-consuming device is not queried, the battery device enters a sleep state after a timeout period; when a power-consuming device is queried and the current battery device is the only battery device, the current battery device enters an active state; when a power-consuming device is queried and the current battery device is not the only battery device, the control unit is configured to initiate battery device negotiation and determine the power supply battery device according to the negotiation result.

[0055] In some embodiments of the present invention, a battery device needs to negotiate when switching between an awake state and an active state.

[0056] In some embodiments of the present invention, when the power system includes multiple battery devices, the initiation conditions of the negotiation instruction include: any of the battery devices enters the awake state from the sleep state, the battery device completes charging, and the battery device is exhausted.

[0057] In some embodiments of the present invention, the negotiation of the battery device includes charging negotiation and discharging negotiation. When the external charger is in a connected state, the control unit performs charging negotiation, otherwise, it performs discharging negotiation.

[0058] In some embodiments of the present invention, the charging negotiation process is: the control unit compares the power levels of the various battery devices and switches the battery device with low power to an active state.

[0059] In some embodiments of the present invention, the process of the discharge negotiation is: the control unit compares the power of each battery device and switches the battery device with a high power to an active state.

[0060] The key to avoiding mutual discharge between battery devices is the switching process between the awake state and the active state. During normal device operation, the device will change from the sleep state to the awake state under specific interrupt triggers, such as acceleration interrupt, charger insertion, etc. For details, refer to Figure 4 As shown in the figure, the battery device wakes up due to acceleration interruption, the battery device will turn on external power supply and broadcast query. If no other device is found, the battery device will re-enter the sleep state after the timeout period. If a useful device is found and it is the only battery device, it will directly enter the active state. If other battery devices are found, power supply device negotiation will be initiated. The one with higher voltage will enter the active state, and the one with lower voltage will stay in the current state and wait for timeout sleep.

[0061] Specifically, refer to Figure 5 As shown, when the charger is plugged in, the control unit scans the bus devices, i.e. broadcasts a query. If no device on the bus is found, the charge and discharge unit is turned on. If there is a device on the bus, it determines whether the device is a battery device. If not, the charge and discharge unit is turned on. Otherwise, negotiation of the battery devices is performed. The power of each battery device is compared and the battery device with low power is switched to an active state, i.e., the charge and discharge unit is turned on.

[0062] In some embodiments of the present invention, when the power supply system is transported over long distances, the control unit outputs a switching instruction to switch the battery device into the transport state; when the control unit receives an access signal from an external charger, it simultaneously sends an instruction to the battery device to exit the transport state.

[0063] The technical solution of the present invention has the following technical effects compared with the prior art: The power supply system provided by the present invention can be equipped with multiple battery devices, thereby improving the overall battery life; and an acceleration sensor 400 is added to the battery device. When stationary, the battery device will automatically stop supplying power to the system, thereby reducing unnecessary power consumption and extending the use time.

[0064] In addition, the common source design of dual MOS tubes is used for the external output switch in the battery device, which can not only realize the separate control of the charging and discharging circuits, but also solve the charging problem when the battery is completely exhausted.

[0065] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0066] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A bicycle electronic speed-changing power supply system, characterized in that: include: at least one power-consuming device and at least one battery device, The power-consuming device is connected to the battery device via a power bus and a communication bus; The battery device comprises a housing, a battery pack, a control unit and a charge and discharge unit; the battery pack is connected to the control unit via the charge and discharge unit; It also includes an acceleration sensor, which is arranged in the shell; the acceleration sensor is connected to the control unit; when the vehicle changes from a static state to a moving state, the acceleration sensor will generate an interrupt to wake up the battery device and supply power to the power bus.

2. The bicycle electronic speed-changing power supply system according to claim 1, characterized in that: The charging and discharging unit includes a first MOS tube and a second MOS tube, both of which adopt a common source connection method as a high-side switch, the first MOS tube is used to control the charging circuit, and the second MOS tube is used to control the discharging circuit; the common source is powered by the control unit through a DC converter.

3. The bicycle electronic speed-changing power supply system according to claim 1, characterized in that: When the power supply system includes a plurality of battery devices, the number of battery devices whose charging and discharging units are turned on at the same time is 1.

4. The bicycle electronic speed-changing power supply system according to claim 2, characterized in that: The working state of the battery device includes a sleep state, a shutdown state, a wake-up state, an active state and a transport state; In the dormant state, the shutdown state and the transport state, the first MOS tube and the second MOS tube are both in the shutdown state; in the awakened state, the first MOS tube is in the shutdown state and the second MOS tube is in the startup state; in the active state, the first MOS tube and the second MOS tube are both in the startup state.

5. The bicycle electronic speed-changing power supply system according to claim 2, characterized in that: When the acceleration sensor sends an interrupt signal to the control unit, the second MOS tube is turned on, and the control unit is configured to query the power-consuming device and the battery device; when no power-consuming device is found, the battery device enters a dormant state after a timeout period; When a power-consuming device is found and the current battery device is the only battery device, the current battery device enters an active state; When a power-consuming device is found and the current battery device is not the only battery device, the control unit is configured to initiate battery device negotiation and determine the battery device that supplies power according to the negotiation result.

6. The bicycle electronic speed-changing power supply system according to claim 4, characterized in that: When the power supply system includes multiple battery devices, the initiation conditions of the negotiation instruction include: any of the battery devices enters the awakening state from the sleep state, the battery device completes charging, and the battery device is exhausted.

7. The bicycle electronic speed-changing power supply system according to claim 1, characterized in that: The negotiation of the battery device includes charging negotiation and discharging negotiation. When the external charger is in a connected state, the control unit performs charging negotiation, otherwise, it performs discharging negotiation.

8. The bicycle electronic speed-changing power supply system according to claim 4, characterized in that: The charging negotiation process is as follows: the control unit compares the power levels of the various battery devices and switches the battery device with low power to an active state.

9. The bicycle electronic speed-changing power supply system according to claim 4, characterized in that: The process of the discharge negotiation is as follows: the control unit compares the power of each battery device and switches the battery device with a higher power to an active state.

10. The bicycle electronic speed-changing power supply system according to claim 4, characterized in that: When the power supply system is transported over a long distance, the control unit outputs a switching instruction to switch the battery device into the transport state; when the control unit receives an access signal from an external charger, it simultaneously sends an instruction to the battery device to exit the transport state.

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