Controller switching dual power supply circuit

Abstract

This utility model relates to the field of electric bicycle technology, specifically to a controller-based dual-power switching circuit for electric resistance bicycles. Its features include a controller and a dual-power unit containing a first power supply battery pack and a second power supply battery pack. The controller is adapted to and connected to both the first and second power supply battery packs. The first power supply battery pack is connected to the electric bicycle's motor (Pmotor) via a switching circuit one, and the second power supply battery pack is connected to the electric bicycle's motor (Pmotor) via a switching circuit two. The controller is adapted to and connected to both switching circuit one and switching circuit two. The controller controls the switching circuit one or switching circuit two to conduct based on the voltage information of the first and second power supply battery packs, realizing the switching power supply between the two battery packs. Using this circuit does not increase the size of the electric bicycle and has a low cost.

Description

Technical Field

[0001] This utility model relates to the field of power-assisted bicycle technology, specifically to a controller for switching dual power supplies in an electric resistance bicycle. Background Technology

[0002] In the field of e-bikes, some customers need to ride for extended periods, but battery life is a weakness of e-bikes. This is because the battery capacity of e-bikes is designed to be very small in order to meet the needs of the general market. Therefore, customers can choose to add an additional battery pack to form a dual power supply system to increase the overall range of the bike. However, adding an extra battery compartment requires additional accessories to meet the current dual power switching requirements.

[0003] Currently, existing technologies use a splitter as an additional accessory to meet the current dual-power switching requirements. Specifically, the interfaces of the two battery packs are connected to opposite ends of the splitter, which then determines which battery pack will power the bicycle's motor. However, adding a splitter requires a separate structural compartment to house it, increasing the overall size of the bicycle. Furthermore, the splitter is expensive, resulting in a high overall cost. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a controller switching dual power supply circuit. Using this circuit will not increase the size of the electric bicycle and has a low cost.

[0005] To solve the above problems, the following technical solutions are provided:

[0006] The controller switching dual power supply circuit of this utility model is characterized by including a controller and a dual power supply unit containing a first power supply battery pack and a second power supply battery pack. The controller is adapted to and connected to the first power supply battery pack and the second power supply battery pack to collect voltage information of the first power supply battery pack and the second power supply battery pack. The first power supply battery pack is connected to the motor Pmotor of the electric bicycle through a switching circuit one, and the second power supply battery pack is connected to the motor Pmotor of the electric bicycle through a switching circuit two. The controller is adapted to and connected to the switching circuit one and the switching circuit two. The controller controls the switching circuit one or the switching circuit two to conduct according to the voltage information of the first power supply battery pack and the second power supply battery pack, so as to realize the switching power supply of the two power supply battery packs.

[0007] The switching circuit one and the switching circuit two have the same structure.

[0008] Both the first switching circuit and the second switching circuit contain NMOS transistors; the drain of the NMOS transistor in the first switching circuit is connected to the first power supply battery pack, the drain of the NMOS transistor in the second switching circuit is connected to the first power supply battery pack, and the source of both NMOS transistors is connected to the motor Pmotor of the electric bicycle; the gate of each NMOS transistor is connected to a driving circuit, and the controller is connected to the driving circuit to control the two NMOS transistors to be turned on or off.

[0009] The driving circuit includes a first transistor, a first resistor, and a tenth resistor. One end of the first resistor is connected to the driving power supply BOOSTV and one end of a second resistor, respectively. The other end of the first resistor is connected to the emitter of the first transistor. The other end of the second resistor is connected to the base of the first transistor and one end of a third resistor. The other end of the third resistor is connected to the collector of the third transistor. The base of the third transistor is connected to one end of a fourth resistor and one end of a fifth resistor, respectively. The other end of the fourth resistor is connected to the controller to receive the Pmotor_Enable signal generated by the controller. The other end of the fifth resistor... The emitter of the third transistor is grounded through the sixth resistor; the collector of the first transistor is connected to the cathode of the first diode, the anode of the second diode, the base of the second transistor, and one end of the seventh resistor; the anode of the first diode, the other end of the seventh resistor, and the collector of the second transistor are all connected to the source of the corresponding NMOS transistor; one end of the tenth resistor is connected to the gate of the corresponding NMOS transistor, and the other end of the tenth resistor is connected to the emitter of the second transistor; the cathode of the second diode is connected to one end of the eighth resistor, and the other end of the eighth resistor is connected to the emitter of the second transistor.

[0010] Both the first switching circuit and the second switching circuit contain a first capacitor and a second capacitor. The source of each NMOS transistor is connected in series with the corresponding first capacitor and second capacitor and then grounded.

[0011] The first power supply battery pack is connected to the anode of diode D7, the second power supply battery pack is connected to the anode of diode D10, the cathodes of diode D7 and diode D10 are connected to the low-voltage conversion unit of the controller switching dual power supply circuit, and the drive power supply BOOSTV is formed by the low-voltage conversion unit.

[0012] The controller contains an MCU chip U4 with the model number MM32SPIN27PS.

[0013] The above approach has the following advantages:

[0014] Because the controller of this invention uses a dual-power supply switching circuit to collect voltage information from the first and second power supply battery packs, and then controls the switching circuit one or switching circuit two to conduct based on the voltage information of the two power supply battery packs, the dual-power supply circuit eliminates the need for a shunt. The controller's own detection scheme switches between the first and second power supply battery packs, and switching circuit one or switching circuit two can be integrated on the existing circuit board. This eliminates the need for an additional compartment on the electric bicycle to house the shunt, reducing the overall size of the bicycle. Moreover, switching circuit one or switching circuit two is less expensive than a shunt. Attached Figure Description

[0015] Figure 1 This is a circuit diagram of the controller switching dual power supply circuit of this utility model;

[0016] Figure 2 This is the circuit diagram of the controller in the dual power supply switching circuit of this utility model;

[0017] Figure 3 This is a circuit diagram of the switching circuit one in the controller switching dual power supply circuit of this utility model;

[0018] Figure 4 This is a circuit diagram of switching circuit two in the controller switching dual power supply circuit of this utility model;

[0019] Figure 5 This is a circuit diagram of the low-voltage conversion unit in the controller switching dual power supply circuit of this utility model;

[0020] Figure 6 This is a circuit diagram of the dual power supply unit in the controller switching dual power supply circuit of this utility model. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1As shown, the controller switching dual power supply circuit of this utility model includes a low-voltage conversion unit, a controller, and a dual power supply unit containing a first power supply battery pack P1 and a second power supply battery pack P2. The dual power supply unit is connected to the low-voltage conversion unit and is used to provide voltage to the low-voltage conversion unit. The low-voltage conversion unit is used to convert the power supply voltage of the dual power supply unit into the controller's operating voltage and drive power BOOSTV. The controller is adapted to connect to the first power supply battery pack P1 and the second power supply battery pack P2 and is used to collect the voltage information of the first power supply battery pack P1 and the second power supply battery pack P2. The first power supply battery pack P1 is connected to the motor Pmotor of the electric bicycle through a switching circuit one, and the second power supply battery pack P2 is connected to the motor Pmotor of the electric bicycle through a switching circuit two. The controller is adapted to connect to switching circuit one and switching circuit two. The controller controls switching circuit one or switching circuit two to conduct according to the voltage information of the first power supply battery pack and the second power supply battery pack, so as to realize the switching power supply of the two power supply battery packs. The controller typically acquires voltage information from the power supply battery pack using a voltage detection circuit. The specific structure of the voltage detection circuit is existing technology and will not be described in detail here. The controller switches to the corresponding power supply battery pack based on the principle that the voltage of the resistor group is higher, according to the voltage information of the first and second power supply battery packs.

[0023] like Figure 6 As shown, the first power supply battery pack P1 is connected to the anode of diode D7, the second power supply battery pack P2 is connected to the anode of diode D10, and the cathodes of diode D7 and D10 form a PSystem power input to the low voltage conversion unit.

[0024] The low-voltage conversion unit contains chip U5 (model EG1192L), chip U6 (model 78L05), and chip U8 (model 78L05). The specific connection structure of chips U5, U6, and U8 is as follows: Figure 5 As shown, the PSystem power supply is connected to chip U5.

[0025] like Figure 5 As shown, the PSystem power supply generates a +12V power supply through chip U5. The +12V power supply is connected to the anode of diode D17. The cathode of diode D17 is connected to one end of capacitor C87, one end of capacitor C89, and the anode of diode D18. The other ends of capacitors C87 and C89 are grounded. The cathode of diode D18 forms the drive power supply BOOSTV. The cathode of diode D18 is connected to one end of capacitor C90 and one end of capacitor C91. The other ends of capacitors C90 and C91 are grounded.

[0026] The controller contains an MCU chip U4 (model MM32SPIN27PS) and peripheral circuitry to drive the MCU chip U4. The specific structure is as follows: Figure 2 As shown.

[0027] Switching circuit one and switching circuit two have the same structure. Both switching circuit one and switching circuit two contain NMOS transistors. The drain of the NMOS transistor in switching circuit one is connected to the first power supply battery pack P1, and the drain of the NMOS transistor in switching circuit two is also connected to the first power supply battery pack P1. The sources of both NMOS transistors are connected to the motor Pmotor of the electric bicycle. The gates of both NMOS transistors are connected to a drive circuit, and the controller is connected to the drive circuit to control the two NMOS transistors to turn on or off.

[0028] like Figure 3 As shown, in this embodiment, the switching circuit includes an NMOS transistor Q2. The drain of the NMOS transistor Q2 is connected to the first power supply battery pack P1. The source of the NMOS transistor Q2 is connected to the ground via a series connection of the first capacitor C5 and the second capacitor C6. The source of the NMOS transistor Q2 is connected to the bicycle motor Pmotor. The driving circuit of switching circuit one includes a first transistor Q9, a first resistor R9, and a tenth resistor R7. One end of the first resistor R9 is connected to the driving power supply BOOSTV and one end of the second resistor R13. The other end of the first resistor R9 is connected to the emitter of the first transistor Q1. The other end of the second resistor R13 is connected to the base of the first transistor Q1 and one end of the third resistor R23. The other end of the third resistor R23 is connected to the collector of the third transistor Q19. The base of the third transistor Q19 is connected to one end of the fourth resistor R30 and one end of the fifth resistor R34. The other end of the fourth resistor R30 is connected to the controller to receive the Pmotor_Enable1 signal generated by the controller. The other end of the fifth resistor R34 is grounded. The emitter of the third transistor Q19 is grounded through the sixth resistor R33. The collector of the first transistor Q9 is connected to the cathode of the first diode D8, the anode of the second diode D5, the base of the second transistor Q11, and one end of the seventh resistor R19. The anode of the first diode D8, the other end of the seventh resistor R19, and the collector of the second transistor Q11 are all connected to the source of the NMOS transistor Q2. One end of the tenth resistor R7 is connected to the gate of the NMOS transistor Q2, and the other end of the tenth resistor R7 is connected to the emitter of the second transistor Q11. The cathode of the second diode D5 is connected to one end of the eighth resistor R10, and the other end of the eighth resistor R10 is connected to the emitter of the second transistor Q11.

[0029] like Figure 4As shown, in this embodiment, the switching circuit two includes an NMOS transistor Q1. The drain of the NMOS transistor Q1 is connected to the first power supply battery pack P1. The source of the NMOS transistor Q1 is connected to the ground via the first capacitor C1 and the second capacitor C2 connected in series. The source of the NMOS transistor Q1 is connected to the bicycle motor Pmotor. The driving circuit of switching circuit two includes a first transistor Q5, a first resistor R3, and a tenth resistor R1. One end of the first resistor R3 is connected to the driving power supply BOOSTV and one end of the second resistor R5. The other end of the first resistor R3 is connected to the emitter of the first transistor Q1. The other end of the second resistor R5 is connected to the base of the first transistor Q1 and one end of the third resistor R11. The other end of the third resistor R11 is connected to the collector of the third transistor Q7. The base of the third transistor Q7 is connected to one end of the fourth resistor R12 and one end of the fifth resistor R14. The other end of the fourth resistor R12 is connected to the controller to receive the Pmotor_Enable1 signal generated by the controller. The other end of the fifth resistor R14 is grounded. The emitter of the third transistor Q7 is grounded through the sixth resistor R15. The collector of the first transistor Q5 is connected to the cathode of the first diode D3, the anode of the second diode D2, the base of the second transistor Q6, and one end of the seventh resistor R8. The anode of the first diode D3, the other end of the seventh resistor R8, and the collector of the second transistor Q6 are all connected to the source of the NMOS transistor Q1. One end of the tenth resistor R1 is connected to the gate of the NMOS transistor Q1, and the other end of the tenth resistor R1 is connected to the emitter of the second transistor Q6. The cathode of the second diode D2 is connected to one end of the eighth resistor R4, and the other end of the eighth resistor R4 is connected to the emitter of the second transistor Q6.

[0030] This utility model's controller switching dual power supply circuit integrates the function of a shunt within the controller, reducing the size of external components, enhancing system stability and compatibility, and simplifying production and maintenance costs for manufacturers. It also enhances design safety, simplifies design and installation processes for manufacturers, improves system compatibility, adapts to different systems, and reduces overall system costs.

Claims

1. A controller switching dual power supply circuit, characterized by comprising: The device includes a controller and a dual-power unit containing a first power supply battery pack and a second power supply battery pack. The controller is adapted to and connected to the first power supply battery pack and the second power supply battery pack to collect voltage information of the first power supply battery pack and the second power supply battery pack. The first power supply battery pack is connected to the motor Pmotor of the electric bicycle through a switching circuit one, and the second power supply battery pack is connected to the motor Pmotor of the electric bicycle through a switching circuit two. The controller is adapted to and connected to the switching circuit one and the switching circuit two. The controller controls the switching circuit one or the switching circuit two to conduct according to the first power supply battery pack and the second power supply battery pack, so as to realize the switching power supply of the two power supply battery packs.

2. The controller changeover dual power supply circuit of claim 1, wherein, The switching circuit one and the switching circuit two have the same structure.

3. The controller changeover dual power supply circuit of claim 2, wherein, Both the first switching circuit and the second switching circuit contain NMOS transistors; the drain of the NMOS transistor in the first switching circuit is connected to the first power supply battery pack, the drain of the NMOS transistor in the second switching circuit is connected to the first power supply battery pack, and the source of both NMOS transistors is connected to the motor Pmotor of the electric bicycle; the gate of each NMOS transistor is connected to a driving circuit, and the controller is connected to the driving circuit to control the two NMOS transistors to be turned on or off.

4. The controller changeover dual power supply circuit of claim 3, wherein, The driving circuit includes a first transistor, a first resistor, and a tenth resistor. One end of the first resistor is connected to the driving power supply BOOSTV and one end of a second resistor, respectively. The other end of the first resistor is connected to the emitter of the first transistor. The other end of the second resistor is connected to the base of the first transistor and one end of a third resistor. The other end of the third resistor is connected to the collector of the third transistor. The base of the third transistor is connected to one end of a fourth resistor and one end of a fifth resistor, respectively. The other end of the fourth resistor is connected to the controller to receive the Pmotor_Enable signal generated by the controller. The other end of the fifth resistor... The emitter of the third transistor is grounded through the sixth resistor; the collector of the first transistor is connected to the cathode of the first diode, the anode of the second diode, the base of the second transistor, and one end of the seventh resistor; the anode of the first diode, the other end of the seventh resistor, and the collector of the second transistor are all connected to the source of the corresponding NMOS transistor; one end of the tenth resistor is connected to the gate of the corresponding NMOS transistor, and the other end of the tenth resistor is connected to the emitter of the second transistor; the cathode of the second diode is connected to one end of the eighth resistor, and the other end of the eighth resistor is connected to the emitter of the second transistor.

5. The controller switching dual power supply circuit as described in claim 3, characterized in that, Both the first switching circuit and the second switching circuit contain a first capacitor and a second capacitor. The source of each NMOS transistor is connected in series with the corresponding first capacitor and second capacitor and then grounded.

6. The controller switching dual power supply circuit as described in claim 4, characterized in that, The first power supply battery pack is connected to the anode of diode D7, the second power supply battery pack is connected to the anode of diode D10, the cathodes of diode D7 and diode D10 are connected to the low-voltage conversion unit of the controller switching dual power supply circuit, and the drive power supply BOOSTV is formed by the low-voltage conversion unit.

7. The controller switching dual power supply circuit as described in claim 1, characterized in that, The controller contains an MCU chip U4 with the model number MM32SPIN27PS.

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