Charging circuit and device

Abstract

The utility model relates to the technical field of intelligent hardware, in particular to a charging circuit and device, and the circuit comprises a charging flag bit detection module and a controller. Wherein the charging flag bit detection module is respectively connected with the charging interface and the controller, and the controller is respectively connected with the charging interface and the battery; the charging flag bit detection module detects charging flag bits of the charging interfaces when the charging interfaces are connected to an adapter for charging, and transmits signals corresponding to the charging flag bits to the controller, and the number of the charging interfaces is at least two; and the controller conducts the loop between the battery and the corresponding charging interface according to the signal corresponding to the charging flag bit, so that the adapter supplies power to the battery through the loop between the battery and the corresponding charging interface, thereby avoiding the phenomenon that when the charging equipment and other external equipment are connected at the same time in the plurality of charging interfaces, the charging equipment cannot be charged. And high voltage generated by the charging equipment can cause the electric energy at the intersection of a plurality of charging interfaces to flow back to other external equipment, so that the equipment is damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent hardware, and in particular to a charging circuit and a device. Background Art

[0002] Currently, electronic products often include multiple charging ports. For example, a dual Type-C charging framework has become a common solution for both charging and data transfer. This design allows users to use two Type-C ports simultaneously: one for charging and the other for connecting external devices such as USB flash drives, keyboards, mice, or other peripherals. However, a significant technical challenge with this dual Type-C charging framework is the interference between charging voltage management and data transfer.

[0003] When a user uses one Type-C port for a USB flash drive or other external device while the other is charging, a voltage overload may occur. This high voltage can cause power at the intersection of the two Type-C ports to flow back into the USB flash drive or other external device, damaging it. This phenomenon, commonly known as "backflow," can damage electronic devices and even compromise data integrity. Utility Model Content

[0004] The main purpose of the present utility model is to provide a charging circuit and device, which aims to solve the technical problem in the prior art that when a charging device and other external devices are simultaneously connected to multiple charging interfaces of an electronic product, the high voltage generated by the charging device will cause the electrical energy at the intersection of the multiple charging interfaces to flow back to other external devices, thereby damaging these devices.

[0005] To achieve the above object, the present invention provides a charging circuit, which includes: a charging flag detection module and a controller;

[0006] The charging flag detection module is connected to the charging interface and the controller respectively, and the controller is connected to the charging interface and the battery respectively;

[0007] The charging flag detection module is used to detect the charging flag of the charging interface when the charging interface is connected to the adapter for charging, and transmit a signal corresponding to the charging flag to the controller. There are at least two charging interfaces;

[0008] The controller is used to conduct the circuit between the battery and the corresponding charging interface according to the signal corresponding to the charging flag, so that the adapter can power the battery through the circuit between the battery and the corresponding charging interface.

[0009] Optionally, the circuit further includes: a first voltage conversion module;

[0010] The first voltage conversion module is respectively connected to the charging interface, the controller and the charging flag detection module;

[0011] The first voltage conversion module is used to convert the power supply voltage output by the adapter into the power supply voltage required by the controller and the charging flag detection module when the charging interface is connected to the adapter for charging, and to power the controller and the charging flag detection module through the supply voltage.

[0012] Optionally, the circuit further includes: a charging management module and a plurality of overvoltage protection modules;

[0013] The input ends of the multiple overvoltage protection modules are respectively connected to the charging interfaces, the output ends of the multiple overvoltage protection modules are connected in parallel to the charging management module, and the charging management module is respectively connected to the battery and the controller;

[0014] The overvoltage protection module is configured to detect the power supply voltage output by the adapter and send an overvoltage protection signal to the charging management module when the power supply voltage is greater than a preset threshold;

[0015] The charging management module is configured to stop supplying power to the controller and the battery upon receiving the overvoltage protection signal.

[0016] Optionally, the charging management module is further configured to, upon receiving the overvoltage protection signal, conduct the circuit between the battery and the controller so that the battery supplies power to the controller.

[0017] Optionally, the circuit further includes: a second voltage conversion module;

[0018] Wherein, the second voltage conversion module is connected to the charging management module and the controller respectively;

[0019] The second voltage conversion module is used to convert the power supply voltage output by the battery into the power supply voltage required by the controller when the loop between the battery and the controller is connected, and power the controller through the power supply voltage.

[0020] Optionally, the multiple overvoltage protection modules are further connected to the controller respectively;

[0021] The controller is further used to turn on the corresponding overvoltage protection module according to the signal corresponding to the charging flag, so that the circuit between the battery and the corresponding charging interface is turned on, so that the adapter can power the battery through the circuit between the battery and the corresponding charging interface.

[0022] Optionally, the circuit further comprises: a plurality of first diodes;

[0023] The anodes of the plurality of first diodes are respectively connected to the charging interfaces, and the cathodes of the first diodes are connected in parallel to the first voltage conversion module.

[0024] Optionally, the circuit further comprises: a second diode;

[0025] The anode of the second diode is connected to the first voltage conversion module, and the cathode of the second diode is connected to the controller and the charging flag detection module.

[0026] Optionally, the circuit further comprises: a third diode;

[0027] An anode of the third diode is connected to the second voltage conversion module, and a cathode of the third diode is connected to the controller.

[0028] In addition, to achieve the above-mentioned purpose, the present invention also provides a charging device, which includes the charging circuit described above.

[0029] In the present invention, the charging circuit includes: a charging flag detection module and a controller; wherein the charging flag detection module is respectively connected to the charging interface and the controller, and the controller is respectively connected to the charging interface and the battery; the charging flag detection module is used to detect the charging flag of the charging interface when the charging interface is connected to the adapter for charging, and transmit a signal corresponding to the charging flag to the controller, and there are at least two charging interfaces; the controller is used to conduct the circuit between the battery and the corresponding charging interface according to the signal corresponding to the charging flag, so that the adapter can power the battery through the circuit between the battery and the corresponding charging interface. The present invention detects the charging flag of the charging interface through the charging flag detection module, and transmits the signal corresponding to the charging flag to the controller, so that the controller conducts the circuit between the battery and the corresponding charging interface according to the signal corresponding to the charging flag, thereby avoiding the problem that when a charging device and other external devices are connected to multiple charging interfaces at the same time, the high voltage generated by the charging device will cause the electric energy at the intersection of multiple charging interfaces to flow back to other external devices, thereby damaging these devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of the first embodiment of the charging circuit of the utility model;

[0031] Figure 2 This is a schematic structural diagram of a second embodiment of a charging circuit of the present utility model;

[0032] Description of Figure Numbers:

[0033]

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different drawings represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present invention.

[0039] The present invention provides a charging circuit. Figure 1 As shown, Figure 1 This is a structural block diagram of the first embodiment of the charging circuit of the utility model. The charging circuit of the utility model includes: a charging flag detection module 10 and a controller 20;

[0040] The charging flag detection module 10 is connected to the charging interface and the controller 20 respectively, and the controller 20 is connected to the charging interface and the battery respectively;

[0041] The charging flag detection module 10 is used to detect the charging flag of the charging interface when the charging interface is connected to the adapter for charging, and transmit the signal corresponding to the charging flag to the controller 20. There are at least two charging interfaces;

[0042] The controller 20 is used to conduct the circuit between the battery and the corresponding charging interface according to the signal corresponding to the charging flag, so that the adapter can power the battery through the circuit between the battery and the corresponding charging interface.

[0043] It should be noted that the above-mentioned charging flag detection module 10 is used to detect the charging flag of the charging interface, wherein the charging flag is usually a signal or flag indicating whether the charging interface is connected to the adapter or the charging device. When the charging interface is connected to the adapter for charging, the charging flag detection module 10 will transmit the corresponding signal to the controller 20. The controller 20 will turn on the circuit between the battery and the charging interface according to the signal corresponding to the charging flag. Specifically, the controller 20 can decide whether to connect the battery to a specific charging interface by detecting the status of the charging flag, thereby establishing a circuit between the battery and the adapter. When the controller 20 turns on the circuit between the battery and the charging interface, the adapter can transmit electrical energy to the battery to charge the battery.

[0044] It should be understood that there are at least two charging interfaces. Accordingly, the number of the charging flag detection modules 10 can correspond to the number of charging interfaces, and they are respectively used to detect the charging flag of each charging interface and send the electrical signal corresponding to the charging flag to the controller 20. Figure 1 , Figure 1 It includes two charging interfaces and two corresponding charging flag detection modules 10. It should be understood that Figure 1 The two charging interfaces and the corresponding two charging flag detection modules 10 do not constitute a limitation to this embodiment. This embodiment may also include multiple charging interfaces and corresponding multiple charging flag detection modules 10. Here, the two charging interfaces and the corresponding two charging flag detection modules 10 are used to illustrate this embodiment.

[0045] It should be noted that the corresponding relationship between the circuit between the battery and the corresponding charging interface connected by the controller 20 according to the signal corresponding to the charging flag can be referred to in Table 1 below.

[0046]

[0047] Table 1

[0048] Among them, the first charging interface and the second charging interface in Table 1 can correspond to Figure 1 In Table 1, the charging flag bit "1" represents that a charging adapter is connected, the charging flag bit "0" represents that no charging adapter is connected, the charging flag bit "0-1" represents from no charging adapter connected to charging adapter connected, and the charging flag bit "1-0" represents from charging adapter connected to no charging adapter connected. The circuit "C1" between the battery and the charging interface represents the circuit between the battery and the first charging interface, and the circuit "C2" between the battery and the charging interface represents the circuit between the battery and the second charging interface. For example, when the charging flag bit detection module 10 detects that the charging flag bit of the first charging interface is "0-1", it indicates that the first charging interface is connected to the charging adapter for charging. When the charging flag bit of the second charging interface is detected to be "0", it indicates that the second charging interface is not connected to the charging adapter for charging. At this time, the controller 20 controls the circuit between the battery and the first charging interface to be connected, so that the charging adapter supplies power to the battery through the circuit between the battery and the first charging interface. For example, when the charging flag detection module 10 detects that the charging flag of the first charging interface is "1", it means that there is a charging adapter for charging at the first charging interface. When the charging flag of the second charging interface is detected to be "0-1", it means that the second charging interface is connected to the charging adapter for charging. At this time, the controller 20 prioritizes controlling the circuit between the battery and the first charging interface to be connected, and controls the circuit between the battery and the second charging interface to be closed, so that the charging adapter powers the battery through the circuit between the battery and the first charging interface.

[0049] The controller 20 controls the conduction or closing of the circuit between the battery and the charging interface according to the charging flag, so that when the charging interface is connected to the charging adapter for charging, only the circuit between the charging interface connected to the charging adapter and the battery is turned on, thereby avoiding the problem that when one charging interface is charging and the other charging interface is connected to other external devices, the high voltage generated by the charging interface causes the electric energy at the intersection with other charging interfaces to flow back to other external devices, thereby damaging these devices.

[0050] It should be understood that the charging interface can be a Type C interface, which can be connected to a charging adapter for charging and other external devices, such as a USB flash drive. The charging flag detection module 10 can be a chip model PDANX7411, which can be used to detect the charging flag of a Type C charging interface, for example. The controller 20 can be an electronic control chip model KB9028Q.

[0051] In this embodiment, the charging circuit includes: a charging flag detection module 10 and a controller 20; wherein the charging flag detection module 10 is connected to the charging interface and the controller 20 respectively, and the controller 20 is connected to the charging interface and the battery respectively; the charging flag detection module 10 is used to detect the charging flag of the charging interface when the charging interface is connected to the adapter for charging, and transmit a signal corresponding to the charging flag to the controller 20, wherein there are at least two charging interfaces; the controller 20 is used to conduct a circuit between the battery and the corresponding charging interface according to the signal corresponding to the charging flag, so that the adapter can power the battery through the circuit between the battery and the corresponding charging interface. In this embodiment, the charging flag detection module 10 detects the charging flag of the charging interface and transmits a signal corresponding to the charging flag to the controller 20, so that the controller 20 conducts a circuit between the battery and the corresponding charging interface according to the signal corresponding to the charging flag, thereby avoiding the problem that when a charging device and other external devices are connected to multiple charging interfaces at the same time, the high voltage generated by the charging device will cause the power at the intersection of multiple charging interfaces to flow back to other external devices, thereby damaging these devices.

[0052] Reference Figure 2 , is a circuit principle diagram of the second embodiment of the charging circuit of the present invention; based on the above-mentioned first embodiment, the second embodiment of the charging circuit of the present invention is proposed.

[0053] In this embodiment, the circuit further includes: a first voltage conversion module 30;

[0054] The first voltage conversion module 30 is connected to the charging interface, the controller 20 and the charging flag detection module 10 respectively;

[0055] The first voltage conversion module 30 is used to convert the power voltage output by the adapter into the power supply voltage required by the controller 20 and the charging flag detection module 10 when the charging interface is connected to the adapter for charging, and to power the controller 20 and the charging flag detection module 10 through the power supply voltage.

[0056] It should be noted that the primary function of the first voltage conversion module 30 is to convert the power voltage output by the adapter into the supply voltage required by the controller 20 and the charging flag detection module 10 when the adapter is connected to the charging port and charging begins. This module ensures that all components in the charging circuit are powered by the correct voltage so that they can function properly.

[0057] It should be understood that the first voltage conversion module 30 can be a linear regulator with a model number of FA2250OT, which can convert the 5V output by the charging adapter into 3.3V to provide power for the controller 20 and the charging flag detection module 10.

[0058] Furthermore, in this embodiment, the circuit further includes: a charging management module 50 and a plurality of overvoltage protection modules 40;

[0059] The input ends of the multiple overvoltage protection modules 40 are respectively connected to the charging interfaces, and the output ends of the multiple overvoltage protection modules 40 are connected in parallel to the charging management module 50, which is respectively connected to the battery and the controller 20;

[0060] The overvoltage protection module 40 is used to detect the power supply voltage output by the adapter and send an overvoltage protection signal to the charging management module 50 when the power supply voltage is greater than a preset threshold;

[0061] The charging management module 50 is configured to stop supplying power to the controller 20 and the battery upon receiving the overvoltage protection signal.

[0062] It should be noted that the charging management module 50 is connected to the battery and controller 20 separately. Its primary function is to manage and monitor the charging process. Upon receiving an overvoltage protection signal from the multiple overvoltage protection modules 40, the charging management module 50 takes necessary measures to shut down power to the battery and controller 20 to ensure circuit safety. The charging management module 50 can implement a range of protection measures, such as overvoltage protection, overcurrent protection, and temperature protection, to prevent damage or hazardous conditions in the circuit.

[0063] It will be appreciated that the input terminals of the multiple overvoltage protection modules 40 are connected to corresponding charging interfaces, and their output terminals are connected in parallel to the charging management module 50. Their primary task is to monitor the power supply voltage output by the adapter. When the power supply voltage exceeds a preset threshold, the overvoltage protection module 40 generates an overvoltage protection signal and sends it to the charging management module 50. This prevents the voltage in the charging circuit from exceeding a safe range, thereby protecting the battery and other components from damage.

[0064] It should be understood that the charging management module 50 may be a charging management chip with a model number of BQ24715, and the overvoltage protection module 40 may be an overvoltage protection chip with a model number of KTS1677.

[0065] Furthermore, in this embodiment, the charging management module 50 is further configured to connect the circuit between the battery and the controller 20 upon receiving the overvoltage protection signal, so that the battery supplies power to the controller 20 .

[0066] It should be noted that the charging management module 50 is not only used to receive the overvoltage protection signal and stop power supply, but can also, when necessary, open the circuit between the battery and the controller 20 so that the battery can supply power to the controller 20. This is an important function that allows the controller 20 to continue to be powered in certain circumstances, even after an overvoltage protection event occurs. Normally, the overvoltage protection signal will trigger the charging management module 50 to take measures to stop charging or disconnect the battery from the charging circuit to prevent the battery from overcharging or being damaged. However, there may be times when it may be necessary to continue to power the controller 20 to ensure that the system can continue to operate during an overvoltage protection event or to take necessary measures to handle the abnormal situation.

[0067] Furthermore, in this embodiment, the circuit further includes: a second voltage conversion module 60;

[0068] Wherein, the second voltage conversion module 60 is connected to the charging management module 50 and the controller 20 respectively;

[0069] The second voltage conversion module 60 is used to convert the power voltage output by the battery into the power supply voltage required by the controller 20 when the loop between the battery and the controller 20 is connected, and power the controller 20 through the power supply voltage.

[0070] It should be noted that the second voltage conversion module 60 is connected to the charging management module 50 and the controller 20, respectively. Its primary function is to convert the power voltage output by the battery into the power supply voltage required by the controller 20 when the circuit between the battery and the controller 20 is connected. This module ensures that the controller 20 is powered by an appropriate voltage to maintain normal operation.

[0071] It should be understood that the second voltage conversion module 60 functions similarly to the first voltage conversion module 30 mentioned above, but is specifically designed for the controller 20 to meet its power requirements. The battery's output voltage may vary depending on the state of charge and battery condition, so a conversion module is required to stabilize and adjust the voltage to ensure proper operation of the controller 20. The second voltage conversion module 60 can be a DC-DC converter model SY8388B3RHC.

[0072] Furthermore, in this embodiment, the multiple overvoltage protection modules 40 are further connected to the controller 20 respectively;

[0073] The controller 20 is also used to turn on the corresponding overvoltage protection module 40 according to the signal corresponding to the charging flag, so that the circuit between the battery and the corresponding charging interface is turned on, so that the adapter can power the battery through the circuit between the battery and the corresponding charging interface.

[0074] It should be noted that, referring to Figure 2 The EC GPIO pin of the overvoltage protection module 40 is a general-purpose input / output pin of the controller 20, used to connect the overvoltage protection module 40 and the controller 20. Multiple overvoltage protection modules 40 are connected not only to the charging management module 50 but also to the controller 20. Furthermore, the controller 20 has a function of activating the corresponding overvoltage protection module 40 based on the signal corresponding to the charging flag bit, thereby facilitating the circuit between the battery and the corresponding charging interface, thereby allowing the adapter to power the battery through the circuit between the battery and the corresponding charging interface.

[0075] In a specific implementation, when the adapter is plugged into the charging port to begin charging, the charging flag detection module 10 detects the charging flag of the charging port and transmits a corresponding signal to the controller 20. The controller 20 receives the signal corresponding to the charging flag and, based on the signal's content, determines which overvoltage protection module 40 needs to be activated. Based on the command from the controller 20, the corresponding overvoltage protection module 40 is activated, allowing the circuit between the battery and the corresponding charging port to be connected. The adapter supplies power to the battery through the circuit between the battery and the connected charging port, and the battery also supplies power to the controller 20.

[0076] Furthermore, in this embodiment, the circuit further includes: a plurality of first diodes D1;

[0077] The anodes of the plurality of first diodes D1 are respectively connected to the corresponding charging interfaces, and the cathodes of the first diodes D1 are connected in parallel to the first voltage conversion module 30 .

[0078] It should be noted that the anodes of the multiple first diodes D1 are connected to corresponding charging interfaces. This means that each charging interface is connected to the anode of a first diode D1. This configuration is used to control the flow of current or prevent reverse current. The cathodes of these multiple first diodes D1 are connected in parallel to the first voltage conversion module 30. This means that their cathodes are all connected to the first voltage conversion module 30, and the input currents of multiple charging interfaces can be merged into a single voltage conversion module for further voltage adjustment and management.

[0079] Furthermore, in this embodiment, the circuit further includes: a second diode D2;

[0080] An anode of the second diode D2 is connected to the first voltage conversion module 30 , and a cathode of the second diode D2 is connected to the controller 20 and the charging flag detection module 10 .

[0081] It should be noted that the second diode D2 can be used to control the direction of current, allowing current to flow from the first voltage conversion module 30 to the controller 20 and the charging flag detection module 10, or blocking the current under certain conditions. The second diode D2 can also be used to separate circuit sections or provide reverse current protection. This helps ensure that the currents between different parts of the circuit do not interfere with each other and provides protection to prevent undesirable current flow.

[0082] Furthermore, in this embodiment, the circuit further includes: a third diode D3;

[0083] An anode of the third diode D3 is connected to the second voltage conversion module 60 , and a cathode of the third diode D3 is connected to the controller 20 .

[0084] It should be noted that the third diode D3 can be used to control the direction of current, allowing current to flow from the second voltage conversion module 60 to the controller 20, or blocking current under certain conditions. The third diode D3 can also be used to provide reverse current protection to ensure that reverse current does not enter the second voltage conversion module 60 or the controller 20. This helps prevent damage to circuit components.

[0085] To achieve the above objectives, the present invention further provides a charging device comprising the above-described charging circuit. The specific structure of the charging circuit is described with reference to the above-described embodiments. Since the present charging device utilizes all of the technical solutions of all of the above-described embodiments, it possesses at least all of the beneficial effects provided by the technical solutions of the above-described embodiments, and therefore will not be further elaborated upon here.

[0086] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A charging circuit, characterized in that: The circuit includes: a charging flag detection module and a controller; The charging flag detection module is connected to the charging interface and the controller respectively, and the controller is connected to the charging interface and the battery respectively; The charging flag detection module is used to detect the charging flag of the charging interface when the charging interface is connected to the adapter for charging, and transmit a signal corresponding to the charging flag to the controller. There are at least two charging interfaces; The controller is used to conduct the circuit between the battery and the corresponding charging interface according to the signal corresponding to the charging flag, so that the adapter can power the battery through the circuit between the battery and the corresponding charging interface.

2. The charging circuit according to claim 1, wherein: The circuit further includes: a first voltage conversion module; The first voltage conversion module is respectively connected to the charging interface, the controller and the charging flag detection module; The first voltage conversion module is used to convert the power supply voltage output by the adapter into the power supply voltage required by the controller and the charging flag detection module when the charging interface is connected to the adapter for charging, and to power the controller and the charging flag detection module through the supply voltage.

3. The charging circuit according to claim 2, wherein: The circuit further comprises: a charging management module and a plurality of overvoltage protection modules; The input ends of the multiple overvoltage protection modules are respectively connected to the charging interfaces, the output ends of the multiple overvoltage protection modules are connected in parallel to the charging management module, and the charging management module is respectively connected to the battery and the controller; The overvoltage protection module is configured to detect the power supply voltage output by the adapter and send an overvoltage protection signal to the charging management module when the power supply voltage is greater than a preset threshold; The charging management module is configured to stop supplying power to the controller and the battery upon receiving the overvoltage protection signal.

4. The charging circuit according to claim 3, wherein: The charging management module is further configured to connect the circuit between the battery and the controller when receiving the overvoltage protection signal, so that the battery supplies power to the controller.

5. The charging circuit according to claim 4, wherein: The circuit further includes: a second voltage conversion module; Wherein, the second voltage conversion module is connected to the charging management module and the controller respectively; The second voltage conversion module is used to convert the power supply voltage output by the battery into the power supply voltage required by the controller when the loop between the battery and the controller is connected, and power the controller through the power supply voltage.

6. The charging circuit according to claim 3, wherein: The multiple overvoltage protection modules are also respectively connected to the controller; The controller is further used to turn on the corresponding overvoltage protection module according to the signal corresponding to the charging flag, so that the circuit between the battery and the corresponding charging interface is turned on, so that the adapter can power the battery through the circuit between the battery and the corresponding charging interface.

7. The charging circuit according to claim 5, wherein: The circuit further includes: a plurality of first diodes; The anodes of the plurality of first diodes are respectively connected to the charging interfaces, and the cathodes of the first diodes are connected in parallel to the first voltage conversion module.

8. The charging circuit according to claim 7, wherein: The circuit further includes: a second diode; The anode of the second diode is connected to the first voltage conversion module, and the cathode of the second diode is connected to the controller and the charging flag detection module.

9. The charging circuit according to claim 8, wherein: The circuit further includes: a third diode; An anode of the third diode is connected to the second voltage conversion module, and a cathode of the third diode is connected to the controller.

10. A charging device, characterized in that: The charging device comprises the charging circuit according to any one of claims 1 to 9.

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