A charging circuit, a charging method, a charger, and a vehicle

Abstract

The application discloses a charging circuit, which comprises a driving controller, an isolation circuit, a driver and a charging end connected in sequence, and further comprises an MCU controller connected with the driving controller, the isolation circuit and the driver; the MCU controller is used for switching the charging state of the charging circuit according to the detected target charging protocol, and the charging state comprises a first charging state corresponding to a first charging protocol and a second charging state corresponding to a second charging protocol; and the isolation circuit is further used for quickly bleeding off the energy in the other charging state when the charging state is switched. It can be seen that the application can avoid the problem that the terminal equipment cannot be charged due to the mis-triggering of the driving device caused by the untimely shutdown of the driving signal during the switching of the charging of different brand terminal equipment, and can timely bleed off the residual electric quantity of different charging circuits, thereby enhancing the compatibility and reliability of the fast charging of different terminal equipment and bringing better charging experience to users.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging, in particular to a charging circuit, a charging method, a charger and a vehicle. BACKGROUND

[0002] With the rapid development of electronic devices, users have more and more demands for fast charging of terminal devices such as mobile phones.

[0003] Different brands of terminal devices correspond to different private fast charging protocols. In order to be compatible with charging protocols of multiple brands, a charger usually needs to be designed with a hardware circuit compatible with charging of multiple brands of terminal devices. However, the existing charger is usually a simple stack of driving circuits, which easily causes driving malfunctions and charging abnormalities during switching between charging of different brands of terminal devices. SUMMARY

[0004] The present application provides a charging circuit, a charging method, a charger and a vehicle, which can avoid the problem of terminal device unable to charge caused by mis-triggering of driving devices due to untimely turning off of driving signals during switching between charging of different brands of terminal devices, timely discharge the residual electric quantity of different charging loops, enhance the compatibility and reliability of switching fast charging of different terminal devices, and bring better charging experience to users.

[0005] To solve the above technical problems, the present application discloses a charging circuit in the first aspect, which comprises:

[0006] a driving controller, an isolation circuit, a driver and a charging end connected in sequence, and further comprising an MCU controller connected with the driving controller, the isolation circuit and the driver respectively;

[0007] The MCU controller is configured to switch the charging state of the charging circuit according to the detected target charging protocol, wherein the charging state comprises a first charging state corresponding to a first charging protocol and a second charging state corresponding to a second charging protocol;

[0008] The driver is configured to drive the charging end to charge;

[0009] In the first charging state, the MCU controller, the isolation circuit, the driver and the charging end form a first charging loop;

[0010] In the second charging state, the MCU controller, the driving controller, the isolation circuit, the driver and the charging end form a second charging loop;

[0011] The isolation circuit is further configured to quickly discharge the energy of another charging loop when the charging state is switched.

[0012] The second aspect of the present application discloses a charging method, which is applied to a charging circuit, the charging circuit comprising a driving controller, an isolation circuit, a driver and a charging terminal connected in sequence, and further comprising an MCU controller connected with the driving controller, the isolation circuit and the driver respectively; the charging method comprising:

[0013] The MCU controller switches the charging state of the charging circuit according to the detected target charging protocol to control the driver to drive the charging terminal to charge; wherein the charging state comprises a first charging state corresponding to a first charging protocol and a second charging state corresponding to a second charging protocol;

[0014] In the first charging state, the MCU controller, the isolation circuit, the driver and the charging terminal form a first charging loop;

[0015] In the second charging state, the MCU controller, the driving controller, the isolation circuit control, the driver and the charging terminal form a second charging loop;

[0016] The isolation circuit is further configured to quickly discharge the energy of another charging loop when the charging state is switched.

[0017] The third aspect of the present application discloses a charger, which comprises any one of the charging circuits disclosed in the first aspect of the present application.

[0018] The fourth aspect of the present application discloses a vehicle, which is loaded with the charger disclosed in the third aspect of the present application.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The charging circuit disclosed in the application comprises a driving controller, an isolation circuit, a driver and a charging end connected in sequence, and further comprises an MCU controller connected with the driving controller, the isolation circuit and the driver respectively; the MCU controller is used for switching a charging state of the charging circuit according to a detected target charging protocol, the charging state comprising a first charging state corresponding to a first charging protocol and a second charging state corresponding to a second charging protocol; the driver is used for driving the charging end to charge; in the first charging state, the MCU controller, the isolation circuit, the driver and the charging end form a first charging loop; in the second charging state, the MCU controller, the driving controller, the isolation circuit control, the driver and the charging end form a second charging loop; the isolation circuit is further used for quickly bleeding off the energy of the other charging loop when the charging state is switched. It can be seen that the application can avoid the problem that the terminal device cannot be charged due to the mis-triggering of the driving device caused by the untimely shutdown of the driving signal in the process of switching the charging of the terminal device of different brands, and can timely bleed off the residual energy of different charging loops, enhance the compatibility and reliability of the switching fast charging of different terminal devices, and bring better charging experience to the user. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0022] Figure 1 is a structural schematic diagram of a charging circuit disclosed by the embodiment of the application;

[0023] Figure 2 is a structural schematic diagram of another charging circuit disclosed by the embodiment of the application;

[0024] Figure 3 is a structural schematic diagram of another charging circuit disclosed by the embodiment of the application;

[0025] Figure 4 is a structural schematic diagram of another charging circuit disclosed by the embodiment of the application;

[0026] Figure 5 is a structural schematic diagram of another charging circuit disclosed by the embodiment of the application;

[0027] Figure 6 is a structural schematic diagram of another charging circuit disclosed by the embodiment of the application;

[0028] Figure 7 is a flow schematic diagram of a charging method disclosed by the embodiment of the application;

[0029] Figure 8 is a schematic diagram of a charger disclosed by an embodiment of the present application. DETAILED DESCRIPTION

[0030] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] The terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product, or end including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product, or end.

[0032] Reference to "an embodiment" in this document means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0033] The present application discloses a charging circuit, which can avoid the problem of terminal device unable to charge caused by mis-triggering of driving device due to untimely turn-off of driving signal during switching of charging of terminal devices of different brands, timely discharge the residual electric quantity of different charging circuits, enhance the compatibility and reliability of switching of fast charging of different terminal devices, and bring better charging experience to users. The following will be described in detail.

[0034] Embodiment one

[0035] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of a charging circuit disclosed by an embodiment of the present application. The circuit can be applied to any circuit that needs to charge terminal devices based on different fast charging protocols, wherein the terminal devices can be mobile phones, tablet computers, smart watches, etc., and the embodiments of the present application are not limited.

[0036] As Figure 1 shown, the charging circuit comprises:

[0037] The driving controller 101, the isolation circuit 102, the driver 103 and the charging end 104 are connected in sequence, and the MCU controller 105 is further included, wherein the MCU controller 105 is connected with the driving controller 101, the isolation circuit 102 and the driver 103 respectively. The driver 103 is used as a driving device of the charging end 104, and is used for driving the charging end 104 to charge the mobile phone. It should be noted that the present application can be used for wireless charging or wired charging of the mobile phone, that is, the charging end 104 can be a wireless charging end (coil end) or a wired charging end (TypeC interface end, PD interface end), and the present application does not limit the embodiment. For example, when the charging circuit is used for wireless charging, the driver 103 can be NU8040, and the driving controller 101 can be CSPQ8100.

[0038] The MCU controller 105 is used for switching the charging state of the charging circuit according to the detected target charging protocol, and the charging state comprises a first charging state corresponding to a first charging protocol and a second charging state corresponding to a second charging protocol. In the first charging state, the MCU controller 105, the isolation circuit 102, the driver 103 and the charging end 104 form a first charging loop. In the second charging state, the MCU controller 105, the driving controller 101, the isolation circuit 102, the driver 103 and the charging end 104 form a second charging loop. The isolation circuit 102 is further used for quickly bleeding off the energy of the other charging loop when the charging state is switched.

[0039] In the embodiment of the present application, the MCU controller 105 can detect the target charging protocol of the terminal device through a wireless (such as NFC) mode or a wired mode (such as TypeC), and the present application does not limit the embodiment. When the target charging protocol matched with the first charging protocol is detected, the MCU controller 105 switches the charging circuit to the first charging state according to the first charging loop. At this time, the MCU controller 105 enables the driver 103, and sends the first power control signal (such as the PWM signal) to the driver 103 through the isolation circuit 102, and then controls the driver 103 to drive the charging end 104 with the power matched with the first power control signal. When the target charging protocol matched with the second charging protocol is detected, the MCU controller 105 switches the charging circuit to the second charging state according to the second charging loop. At this time, the MCU controller 105 enables the driver 103, and controls the driving controller 101 to send the second power control signal to the driver 103 through the isolation circuit 102, and then controls the driver 103 to drive the charging end 104 with the power matched with the second power control signal.

[0040] In this embodiment of the invention, the isolation circuit 102 is used to isolate the energy signals between the first charging circuit and the second charging circuit during the first charging state and the second charging state. That is, during the first charging state, it prevents the first power control signal from being transmitted to the drive controller 101; during the second charging state, it prevents the second power control signal from being transmitted to the MCU controller 105. Furthermore, the isolation circuit 102 is also used to quickly discharge the energy of the other charging circuit when switching charging states. That is, when switching from the first charging state to the second charging state, the first power control signal is quickly discharged, and when switching from the second charging state to the first charging state, the second power control signal is quickly discharged, preventing residual power in the power control signal from causing false triggering of the driver 103 during charging state switching.

[0041] As can be seen, the charging circuit described in this embodiment of the invention can avoid the problem of terminal devices being unable to charge due to accidental triggering of driving devices caused by untimely shutdown of driving signals during the switching of charging of different brand terminal devices, timely discharge of residual power in different charging circuits, enhance the compatibility and reliability of fast charging switching of different terminal devices, and bring users a better charging experience.

[0042] In an optional embodiment, such as Figure 2 As shown, the isolation circuit 102 includes: a first isolation module 1021, a first discharge module 1022, a second isolation module 1023, and a second discharge module 1024. The MCU controller 105 is connected to the first terminal of the first isolation module 1021, the second terminal of the first isolation module 1021 is connected to the first terminal of the first discharge module 1022, and the second terminal of the first isolation module 1021 is also connected to the driver 103. The second terminal of the first discharge module 1022 is grounded. The driver controller 101 is connected to the first terminal of the second discharge module 1024, the first terminal of the second discharge module 1024 is also connected to the first terminal of the second isolation module 1023, and the second terminal of the second discharge module 1024 is grounded. The second terminal of the second isolation module 1023 is connected to the first terminal of the first discharge module 1022.

[0043] In this embodiment of the invention, during the first charging state, the MCU controller 105, the first isolation module 1021, the driver 103, and the charging terminal 104 form a first charging circuit; during the second charging state, the MCU controller 105, the driver controller 101, the second isolation module 1023, the driver 103, and the charging terminal 104 form a second charging circuit. For example, both the first isolation module 1021 and the second isolation module 1024 can be diodes, completely isolating the first power control signal at the MCU controller 105 terminal from the second power control signal at the driver controller 101 terminal.

[0044] As shown in Figure 3 , the first discharge module 1022 can be a first resistor (R1) with one end grounded, which discharges the power control signal on the connection line between the second end of the first isolation module 1021 and the driver 103. The second discharge module 1024 can be a third resistor (R3) with one end grounded, which discharges the power control signal on the connection line between the first end of the second isolation module 1023 and the drive controller 101; at the same time, the second discharge module 1024 can also output a low-level power control signal when the charging circuit is not in the charging state, that is, when the drive controller 101 does not work, so as to avoid miscontrol of the driver.

[0045] It can be seen that the charging circuit described in the embodiment of the application can effectively isolate the power control signal during the charging state switching through the isolation circuit, and at the same time, discharge the residual energy of the power control signal on the line in time, improve the discharge rate, and ensure that different power control signals can be effectively switched between high and low levels.

[0046] In this alternative embodiment, as shown in Figure 3 , the second isolation module 1023 can be a first switching device (Q1), wherein the first end of the first switching device (Q1) is connected with the first end of the second discharge module 1024, the second end of the first switching device (Q1) is connected with the first end of the first discharge module 1022, and the third end of the first switching device (Q1) is connected with the power supply.

[0047] In the embodiment of the application, the first switching device (Q1) can be an NPN triode. When the second power control signal is at a high level in the second charging state, the first switching device (Q1) is triggered to be conductive, and the 3.3V power supply flows into the first resistor (R1) through the collector of the first switching device (Q1) in one way and flows to the input end of the driver 103 in another way. When the second power control signal is at a low level, the first switching device (Q1) is not conductive, and the energy at the input end of the driver 103 can be quickly discharged or absorbed through the first resistor (R1), so as to prepare for the high-level signal of the drive control end 101 next time. For example, in order to limit the current at the input end of the driver 103, a current-limiting resistor (R6) can be added between the second isolation module 1023 and the input end of the driver 103.

[0048] It can be seen that the charging circuit described in the embodiment of the application can isolate the signal through the second isolation module, at the same time, enhance the driving capability of the output end of the drive controller, ensure that the PWM square wave signal can be quickly switched during the charging process, and reduce the device loss.

[0049] In this alternative embodiment, as shown in Figure 4As shown, the second isolation module 1023 can also be a combination of the first switch device (Q1) and the second switch device (Q2), wherein the first end of the first switch device (Q1) is connected with the third end of the second switch device (Q2), the second end of the first switch device (Q1) is connected with the first end of the first discharge module 1022, and the third end of the first switch device (Q1) is connected with the power supply; the first end of the second switch device (Q2) is connected with the first end of the second discharge module 1024, and the second end of the second switch device (Q2) is grounded.

[0050] In the embodiment of the application, the first switch device (Q1) can be a PNP triode, the second switch device (Q2) can be an NPN triode, when the second power control signal is high, the second switch device (Q2) is triggered to be conductive, the base voltage of the first switch device (Q1) is pulled down, at this time, the first switch device (Q1) is conductive, and the 3.3V power supply flows into the first resistor (R1) through the emitter of the first switch device (Q1) in one way and flows to the input end of the driver 103 in another way. When the second power control signal is low, the first switch device (Q1) and the second switch device (Q2) are both not conductive, and the energy at the input end of the driver 103 can be quickly discharged or absorbed through the first resistor (R1), so as to prepare for the next high-level signal of the driving control end 101.

[0051] In addition, the second isolation module 1023 further includes a second resistor (R2) and a first capacitor (C1), wherein the two ends of the second resistor (R2) are respectively connected with the third end of the first switch device (Q1) and the third end of the second switch device (Q2); the two ends of the first capacitor (C1) are respectively connected with the power supply and the ground, and the first capacitor (C1) plays a role of filtering and current limiting.

[0052] It can be seen that the charging circuit described in the embodiment of the application can further enhance the signal isolation capability through the second isolation module composed of two-stage switch devices, and further enhance the driving capability of the output end of the driving controller, so as to ensure that the PWM square wave signal can be quickly switched during the charging process and reduce the device loss.

[0053] In another optional embodiment, the second discharge module 1024 can further include a third switch device (Q3), wherein the first end of the third switch device (Q3) is connected with the first end of the second isolation module 1023, the second end of the third switch device (Q3) is grounded, the third end of the third switch device (Q3) is connected with the MCU controller 105, and the MCU controller 105 is further used for controlling the first end and the second end of the third switch device (Q3) to be conductive to the ground to discharge energy when the charging circuit is switched from the second charging state to the first charging state.

[0054] In the embodiment of the present application, the third switch device (Q3) can be an N-channel enhancement-mode MOSFET, so that after the driving controller 101 is turned off, the MCU controller 105 drives a high-level signal to the gate of the third switch device (Q3) through the IO port, triggering the drain and source of the third switch device (Q3) to conduct, completely pulling down the output end of the driving controller 101, achieving the purpose of completely turning off the driving controller 101, and ensuring that there is no possible misoperation of the high-level signal to the second isolation circuit. For example, in order to limit the current of the drain and source conduction, a current limiting resistor (R4) can be added between the output end of the driving controller 101 and the third switch device (Q3), or a current limiting resistor can be added between the third switch device (Q3) and the ground, which is not limited in the embodiment of the present application.

[0055] It can be seen that the charging circuit described in the embodiment of the present application can achieve the purpose of quickly discharging the second power control signal by pulling down the output end of the driving controller through the MCU control switch device, completely turning off the driving signal of the driving controller output end, further avoiding the problem that the terminal device cannot be charged due to the mis-triggering of the driving device caused by the untimely turning off of the driving signal, enhancing the compatibility and reliability of the fast charging of different terminal devices, and bringing better charging experience to the user.

[0056] It should be noted that the embodiment of the present application only shows a single control line charging circuit, as shown in Figure 5 and Figure 6 For the charging circuit of double control lines, the present application is also applicable.

[0057] Embodiment two

[0058] Please refer to Figure 7 , Figure 7 is a flowchart of a charging method disclosed in the embodiment of the present application. Among them, Figure 7 The method described in the embodiment can be applied to the charging circuit in the first embodiment.

[0059] As shown in Figure 7 , the charging method can include the following operations:

[0060] 201, the MCU controller switches the charging state of the charging circuit according to the detected target charging protocol, to control the driver to drive the charging end to charge.

[0061] 202, in the first charging state, the MCU controller enables the driver, and sends a first power control signal to control the driver to drive the charging end through the isolation circuit.

[0062] 203、In the second charging state, the MCU controller enables the driver and controls the drive controller to send a second power control signal to control the driver to drive the charging end through the isolation circuit.

[0063] It can be seen that the method described in the embodiment of the application can avoid the problem of the terminal device being unable to charge due to the mis-triggering of the driving device caused by the driving signal being turned off in time during the switching of different brand terminal devices for charging, timely discharge the residual electric quantity of different charging loops, enhance the compatibility and reliability of the switching of fast charging of different terminal devices, and bring better charging experience to the user.

[0064] In an optional embodiment, the MCU controller switches the charging state of the charging circuit according to the detected target charging protocol to control the driver to drive the charging end to charge, and can include the following operations:

[0065] The MCU controller judges whether the detected target charging protocol matches the first charging protocol; wherein the first charging protocol is preset in the MCU controller or the driver;

[0066] When the judgment result is yes, the MCU controller switches the charging state of the charging circuit to the first charging state.

[0067] In the embodiment of the application, the MCU controller can obtain the target charging protocol of the terminal device in a wired or wireless manner, and if the first charging protocol is preset in the MCU, the MCU can compare whether the preset first charging protocol matches the target charging protocol; if the first charging protocol is not preset in the MCU but is preset in the driver, the MCU can communicate with the driver to obtain the matching result of the charging protocol. When it is judged that the target charging protocol is the same as or compatible with the first charging protocol, the MCU controller switches the charging state of the charging circuit to the first charging state.

[0068] In another optional embodiment, the MCU controller switches the charging state of the charging circuit according to the detected target charging protocol to control the driver to drive the charging end to charge, and can further include the following operations:

[0069] The MCU controller judges whether the detected target charging protocol matches the second charging protocol; wherein the second charging protocol is preset in the drive controller;

[0070] When the judgment result is yes, the MCU controller switches the charging state of the charging circuit to the second charging state.

[0071] In the embodiment of the application, the second charging protocol is preset in the drive controller, the MCU can communicate with the drive controller to obtain the matching result of the charging protocol, and then switch the charging state to the second charging state according to the matching result.

[0072] It can be seen that the method described in the embodiment of the application can provide a charging method compatible with multiple charging protocols, improve the compatibility and reliability of the scheme, and bring better charging experience to users.

[0073] In the optional embodiment, further optionally, the second discharge module further comprises a third switching device (Q3), wherein the first end of the third switching device (Q3) is connected with the first end of the second isolation module, the second end of the third switching device (Q3) is grounded, and the MCU controller is further connected with the third end of the third switching device (Q3). The method can further comprise the following operations:

[0074] The MCU controller controls the first end and the second end of the third switching device (Q3) to be conductive to discharge energy when the charging circuit is switched from the second charging state to the first charging state.

[0075] In the embodiment of the application, the third switching device (Q3) can be an N-channel enhancement-mode MOSFET, and the MCU controller can drive a high-level signal to the gate of the third switching device (Q3) through an IO port, trigger the drain and source of the third switching device (Q3) to be conductive, completely pull down the output end of the drive controller, and achieve the purpose of completely shutting down the drive controller, so as to ensure that any possible misoperation high-level signal cannot reach the second isolation circuit.

[0076] It can be seen that the method described in the embodiment of the application can achieve the purpose of quickly discharging the second power control signal by the MCU controlling the switching device to pull down the output end of the drive controller, completely shut down the drive signal of the drive control output end, and further avoid the problem that the terminal device cannot be charged due to the mis-triggering of the drive device caused by the untimely shutdown of the drive signal.

[0077] Embodiment three

[0078] Please refer to Figure 8 , Figure 8 is a schematic diagram of a charger disclosed in the embodiment of the application. In the diagram, Figure 8 The charger described in the embodiment comprises any one of the charging circuits in the embodiment one. For example, the charger disclosed in the application can be applied to a vehicle and used as a vehicle-mounted charger.

[0079] Embodiment four

[0080] The embodiment of the application further discloses a vehicle loaded with any one of the chargers shown in the embodiment three.

[0081] Through the specific description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software and the necessary general hardware platform, and of course, can also be realized by hardware. Finally, it should be noted that: the charging circuit, the charging method, the charger and the vehicle disclosed by the embodiments of the present application are only the preferred embodiments of the present application, and are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand; the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A charging circuit, characterized by, The charging circuit comprises a driving controller, an isolation circuit, a driver and a charging terminal connected in sequence, and further comprises an MCU controller connected with the driving controller, the isolation circuit and the driver respectively. The MCU controller is configured to switch a charging state of the charging circuit according to a detected target charging protocol, wherein the charging state comprises a first charging state corresponding to a first charging protocol and a second charging state corresponding to a second charging protocol. In the first charging state, the MCU controller, the isolation circuit, the driver and the charging terminal form a first charging loop. In the second charging state, the MCU controller, the driving controller, the isolation circuit, the driver and the charging terminal form a second charging loop. The driver is configured to drive the charging terminal to charge. The isolation circuit is further configured to quickly discharge energy of another charging loop when the charging state is switched. The isolation circuit comprises a first isolation module, a first discharge module, a second isolation module and a second discharge module.

2. The charging circuit of claim 1, wherein, The MCU controller is connected with a first end of the first isolation module, a second end of the first isolation module is connected with a first end of the first discharge module, the second end of the first isolation module is further connected with the driver, and a second end of the first discharge module is grounded. The driving controller is connected with a first end of the second discharge module, the first end of the second discharge module is further connected with a first end of the second isolation module, and a second end of the second discharge module is grounded. The second end of the second isolation module is connected with the first end of the first discharge module. In the first charging state, the MCU controller, the first isolation module, the driver and the charging terminal form a first charging loop. In the second charging state, the MCU controller, the driving controller, the second isolation module, the driver and the charging terminal form a second charging loop. The first discharge module is configured to discharge energy of the second end of the first isolation module, and the second discharge module is configured to discharge energy of the first end of the second isolation module. The first discharge module comprises a first resistor (R1).

3. The charging circuit of claim 2, wherein, A first end of the first resistor (R1) is connected with the second end of the first isolation module, and a second end of the first resistor (R1) is grounded. The second isolation module comprises a first switch device (Q1).

4. The charging circuit according to claim 2 or 3, characterized in that, A first end of the first switch device (Q1) is connected with the first end of the second discharge module, a second end of the first switch device (Q1) is connected with the first end of the first discharge module, and a third end of the first switch device (Q1) is connected with a power supply. The second isolation module comprises a first switch device (Q1) and a second switch device (Q2).

5. The charging circuit according to claim 2 or 3, characterized in that, A first end of the first switch device (Q1) is connected with a third end of the second switch device (Q2), a second end of the first switch device (Q1) is connected with the first end of the first discharge module, and a third end of the first switch device (Q1) is connected with a power supply. ​ The first end of the second switch device (Q2) is connected with the first end of the second discharge module, and the second end of the second switch device (Q2) is grounded.

6. The charging circuit of claim 5, wherein, The second isolation module further comprises a second resistor (R2) and a first capacitor (C1); The two ends of the second resistor are respectively connected with the third end of the first switch device (Q1) and the third end of the second switch device (Q2); The two ends of the first capacitor (C1) are respectively connected with a power supply and ground.

7. The charging circuit of claim 2, wherein, The second discharge module comprises a third resistor (R3); The first end of the third resistor (R3) is connected with the first end of the second isolation module, and the second end of the third resistor (R3) is grounded.

8. The charging circuit of claim 7, wherein, The second discharge module further comprises a third switch device (Q3); The first end of the third switch device (Q3) is connected with the first end of the second isolation module, and the second end of the third switch device (Q3) is grounded. The MCU controller is further connected with the third end of the third switch device (Q3), and the MCU controller is further used for controlling the first end and the second end of the third switch device (Q3) to be conducted to ground to discharge energy when the charging circuit is switched from the second charging state to the first charging state.

9. A charging method characterized by, The method is applied to a charging circuit, the charging circuit comprising a driving controller, an isolation circuit, a driver and a charging end connected in sequence, and further comprising an MCU controller connected with the driving controller, the isolation circuit and the driver respectively; the method comprises: The MCU controller switches the charging state of the charging circuit according to the detected target charging protocol, to control the driver to drive the charging end to charge; wherein the charging state comprises a first charging state corresponding to a first charging protocol and a second charging state corresponding to a second charging protocol; In the first charging state, the MCU controller enables the driver and sends a first power control signal to control the driver to drive the charging end through the isolation circuit; In the second charging state, the MCU controller enables the driver and controls the driving controller to send a second power control signal to control the driver to drive the charging end through the isolation circuit; The isolation circuit is further used for quickly discharging the energy of another charging loop when the charging state is switched.

10. The charging method according to claim 9, characterized by, The MCU controller switches the charging state of the charging circuit according to the detected target charging protocol, to control the driver to drive the charging end to charge, comprising: The MCU controller judges whether the detected target charging protocol matches the first charging protocol; wherein the first charging protocol is preset in the MCU controller or the driver; When the judgment result is yes, the MCU controller switches the charging state of the charging circuit to the first charging state.

11. The charging method according to claim 9, characterized by, The MCU controller switches the charging state of the charging circuit according to the detected target charging protocol, to control the driver to drive the charging end to charge, comprising: The MCU controller judges whether the detected target charging protocol matches the second charging protocol; wherein the second charging protocol is preset in the drive controller; When the judgment result is yes, the MCU controller switches the charging state of the charging circuit to the second charging state.

12. The charging method according to any one of claims 9 to 11, characterized in that, The isolation circuit comprises: a first discharge module, a first isolation module, a second discharge module and a second isolation module; The MCU controller is connected with a first end of the first isolation module, a first end of the first isolation module is connected with a first end of the first discharge module, a second end of the first isolation module is also connected with the driver, and a second end of the first discharge module is grounded; The drive controller is connected with a first end of the second discharge module, a first end of the second discharge module is also connected with a first end of the second isolation module, and a second end of the second discharge module is grounded; a second end of the second isolation module is connected with a first end of the first discharge module; In the first charging state, the MCU controller, the first isolation module, the driver and the charging end form a first charging loop; In the second charging state, the MCU controller, the drive controller, the second isolation module, the driver and the charging end form a second charging loop; The first discharge module is used for discharging the energy of the second end of the first isolation module, and the second discharge module is used for discharging the energy of the first end of the second isolation module.

13. The charging method according to claim 12, characterized by, The second discharge module further comprises a third switching device (Q3), a first end of the third switching device (Q3) is connected with the first end of the second isolation module, a second end of the third switching device (Q3) is grounded, the MCU controller is also connected with a third end of the third switching device (Q3), and the method further comprises: When the charging circuit is switched from the second charging state to the first charging state, the MCU controller controls the first end and the second end of the third switching device (Q3) to be conductive to discharge energy.

14. A charger characterized by comprising: The charger comprises the charging circuit according to any one of claims 1-8.

15. A vehicle characterized by comprising: The charger comprises the charger according to claim 14.

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