Charge and discharge control method, circuit and charge and discharge integrated gun

Abstract

A charging and discharging control method, circuit, and integrated charging and discharging gun are disclosed. The charging and discharging control circuit includes a first interface module, a second interface module, and a processor. The charging and discharging control method includes: when the first interface module is electrically connected to a power source, controlling the vehicle to enter a charging mode; controlling the vehicle to enter the charging mode includes: detecting whether there is a first PWM signal at the signal terminal of the first interface module; if there is a first PWM signal at the signal terminal of the first interface module, controlling the vehicle to enter a charging pile charging mode; if there is no first PWM signal at the signal terminal of the first interface module, controlling the vehicle to enter a grid charging mode. The technical solution provided by the embodiments of the present invention can meet the needs of charging pile charging or grid charging.

Claims

1. A charging and discharging control method, wherein the charging and discharging control method is executed by a processor in a charging and discharging control circuit, the charging and discharging control circuit including a first interface module, a second interface module, and a processor, the second interface module being electrically connected to a vehicle, the first interface module and the second interface module being electrically connected to the processor, the first interface module being connected to a load or a power source, the power source including a power grid or a charging pile, the charging and discharging control method comprising: When the first interface module is electrically connected to the power supply, the vehicle is controlled to enter the charging mode; The step of controlling the vehicle to enter charging mode includes: detecting whether there is a first PWM signal at the signal terminal of the first interface module; If the first interface module has the first PWM signal, the vehicle is controlled to enter the charging pile charging mode; if the first interface module does not have the first PWM signal, the vehicle is controlled to enter the grid charging mode.

2. The charging and discharging control method as described in claim 1, wherein, The charging and discharging control circuit further includes a first signal detection module, which includes a first field-effect transistor. The gate of the first field-effect transistor is used to receive the voltage signal from the signal terminal of the first interface module. The drain of the first field-effect transistor is electrically connected to the processor through a first resistor. The drain of the first field-effect transistor is connected to the power supply voltage through a pull-up resistor. The source of the first field-effect transistor is grounded.

3. The charging and discharging control method as described in claim 2, wherein, The control of the vehicle to enter the charging pile charging mode includes: obtaining the frequency and duty cycle of the first PWM signal through the first signal detection module; and outputting a first target PWM signal to the vehicle based on the frequency and duty cycle of the first PWM signal.

4. The charge / discharge control method as described in claim 1, wherein, The first interface module is electrically connected to the power grid via accessories. The accessories include at least one of a 10A plug, a 16A plug, and a 32A industrial plug adapted to the first interface module. Each of the 10A, 16A, and 32A industrial plugs has a voltage divider resistor with a different resistance value. The charging / discharging control circuit further includes a type detection module, which outputs an AD value based on the resistance value of the voltage divider resistor. Controlling the vehicle to enter the power grid charging mode includes: acquiring the AD value output by the type detection module, and determining whether the first interface module is connected to a 10A plug, a 16A plug, or a 32A industrial plug based on the AD value.

5. The charge / discharge control method as described in claim 1, wherein, The charging and discharging control circuit further includes a switching module. The L terminal of the first interface module is connected to the L terminal of the second interface module through the switching module. The N terminal of the first interface module is connected to the N terminal of the second interface module through the switching module. The switching module is used to control the connection and disconnection between the L and N terminals of the first interface module and the L and N terminals of the second interface module, respectively. The charging and discharging control method further includes: detecting the voltage signals at the L and N terminals of the first interface module and the voltage signals at the L and N terminals of the second interface module; If there is a voltage signal at the L and N terminals of the first interface module, and no voltage signal at the L and N terminals of the second interface module, then it is determined that the first interface module is electrically connected to the power supply; if there is no voltage signal at the L and N terminals of the first interface module, and a voltage signal at the L and N terminals of the second interface module, then it is determined that the first interface module is electrically connected to the load.

6. The charge / discharge control method as described in claim 5, wherein, The charging and discharging control circuit further includes a state switching module, which includes a first identification resistor unit for adapting to the charging mode, a second identification resistor unit for adapting to the discharging mode, and a first switch. The first switch is used to control the first identification resistor unit or the second identification resistor unit to connect to the second interface module. The charging and discharging control method further includes: detecting the voltage signals at the L and N terminals of the first interface module and the voltage signals at the L and N terminals of the second interface module; If there are voltage signals at the L and N terminals of the first interface module and the second interface module, control the first identification resistor unit to connect to the second interface module; Then, detect the voltage signals at the L and N terminals of both the first and second interface modules again; If there are voltage signals at the L and N terminals of the first interface module and the second interface module, determine that the first interface module is electrically connected to the power supply; If there are voltage signals at the L and N terminals of both the first and second interface modules, determine that either the vehicle-side or the switch module is malfunctioning.

7. The charge / discharge control method as described in claim 6, wherein, Before controlling the vehicle to enter the charging mode when the first interface module is connected to the power supply, the following steps are taken: setting an initial state, wherein the initial state includes disconnecting the L and N terminals of the first interface module from the L and N terminals of the second interface module, and connecting the second identification resistor unit to the second interface module.

8. The charge / discharge control method as described in claim 1, wherein, When it is determined that the vehicle has entered an abnormal mode, the L and N terminals of the first interface module are disconnected from the L and N terminals of the second interface module.

9. A charging and discharging control circuit, comprising: The system comprises a first interface module, a second interface module, and a processor. The second interface module is electrically connected to the vehicle. Both the first and second interface modules are electrically connected to the processor. The first interface module is used to connect to a load or power source, including the power grid or a charging pile. The processor performs the following steps: When the first interface module is electrically connected to the power source, it controls the vehicle to enter a charging mode. Controlling the vehicle to enter the charging mode includes: detecting whether there is a first PWM signal at the signal terminal of the first interface module; if there is the first PWM signal at the signal terminal of the first interface module, it controls the vehicle to enter a charging pile charging mode; if there is no first PWM signal at the signal terminal of the first interface module, it controls the vehicle to enter a grid charging mode.

10. The charge / discharge control circuit as described in claim 9, wherein, The charging and discharging control circuit further includes a first signal detection module, which includes a first field-effect transistor. The gate of the first field-effect transistor is used to receive the voltage signal from the signal terminal of the first interface module. The drain of the first field-effect transistor is electrically connected to the processor through a first resistor. The drain of the first field-effect transistor is connected to the power supply voltage through a pull-up resistor. The source of the first field-effect transistor is grounded.

11. The charge / discharge control circuit as described in claim 9, wherein, It also includes a switch module, wherein the L-terminal of the first interface module is connected to the L-terminal of the second interface module through the switch module; The N terminal of the first interface module is connected to the N terminal of the second interface module through the switch module; the switch module is used to control the connection and disconnection between the L and N terminals of the first interface module and the L and N terminals of the second interface module, respectively.

12. The charge / discharge control circuit as described in claim 9, wherein, It also includes a state switching module, which includes a first identification resistor unit for adapting to the charging mode, a second identification resistor unit for adapting to the discharging mode, and a first switch. The first switch is used to control the connection of the first identification resistor unit or the second identification resistor unit to the second interface module.

13. The charge / discharge control circuit as described in claim 9, wherein, It also includes a type detection module, which includes a second resistor. When the type detection module is working, one end of the second resistor receives the supply voltage, and the other end of the second resistor is electrically connected to the signal terminal of the first interface module. When the first interface module is connected to the load or power supply, the first interface module is electrically connected to the load or power supply through an accessory, which includes at least one of a three-prong plug, a power strip, and an accessory charging gun. At least one of the three-prong plug and the power strip is provided with a voltage divider identification resistor. One end of the voltage divider identification resistor is electrically connected to the signal terminal of the first interface module, and the other end of the voltage divider identification resistor is grounded. The processor is used to obtain the AD value of the signal terminal of the first interface module.

14. The charge / discharge control circuit as described in claim 9, wherein, It also includes a type detection module, which comprises a voltage regulator diode, a clamping diode, a fourth resistor, and a filter capacitor. The positive terminal of the voltage regulator diode is grounded, and the negative terminal of the voltage regulator diode is electrically connected to the signal terminal of the first interface module. The negative terminal of the voltage regulator diode is electrically connected to the first terminal of the clamping diode through the fourth resistor. The second terminal of the clamping diode is grounded, and the third terminal of the clamping diode is connected to the power supply voltage. The third terminal of the clamping diode is grounded through the filter capacitor, and the third terminal of the clamping diode is electrically connected to the first terminal of the clamping diode through a fifth resistor. When the first interface module is connected to the load or power supply, the first interface module is electrically connected to the load or power supply through an accessory. The accessory includes at least one of a three-prong plug, a power strip, and an accessory charging gun. At least one of the three-prong plug and the power strip is equipped with a temperature sensing IC, which is electrically connected to the signal terminal of the first interface module. The processor is used to acquire digital data from the signal terminal of the first interface module.

15. The charge / discharge control circuit as described in claim 9, wherein, It also includes a signal generation module, which comprises a first transistor, a second transistor, a third transistor, and a fourth transistor. The base of the first transistor receives a power supply voltage, the collector of the first transistor is electrically connected to the base of the third transistor, the emitters of the first transistor and the second transistor are connected to different ports of the processor, the base of the second transistor is grounded, the collector of the second transistor is electrically connected to the base of the fourth transistor, the emitter of the fourth transistor receives a second voltage, and the collector of the fourth transistor is electrically connected to the collector of the third transistor. When the signal generation module is working, the collector of the fourth transistor is electrically connected to the signal terminal of the first interface module or to the control and guidance terminal of the second interface module, and the emitter of the third transistor receives a first voltage.

16. A charging and discharging gun, comprising a vehicle-side charging and discharging gun body and accessories, wherein the vehicle-side charging and discharging gun body includes a charging and discharging control circuit as described in any one of claims 9 to 15; the accessories are adapted to a first interface module, and the accessories include at least one of a three-prong plug, a power strip, and an accessory charging gun.

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