CN111917163A - Multi-port charging control circuit and method, charging chip and power supply device - Google Patents

Abstract

The present application provides a multi-port charging control circuit, which includes a charging control module and a plurality of charging paths. When there are at least two conductive charging paths, the charging control module detects the output current of each conductive charging path, and when the state of the target charging load connected to the target charging path meets the preset condition, disconnects the target a charging path; and when there is only one conductive charging path, adjusting the output voltage to a target charging voltage requested by the charging load connected to the conductive charging path. The preset conditions include that the target charging load is unplugged, or the target charging load is not unplugged but the output current of the target charging path remains below a preset current threshold for a duration exceeding a preset time threshold. The application also provides a multi-port charging control method, a charging chip and a power supply device. The present application can effectively monitor the plugging and unplugging states and fully charged states of the charging loads of each charging path, and can dynamically and flexibly adjust the output voltage.

Description

Multi-port charging control circuit and method, charging chip and power supply device

technical field

The present application relates to the technical field of charging, and in particular, to a multi-port charging control circuit and method, a charging chip, and a power supply device having the multi-port charging control circuit or charging chip.

Background technique

In recent years, with the development of fast charging technology, various fast charging technologies have become more and more widely used, and there are more and more fast charging power supply devices such as fast charging adapters, fast charging car chargers, and fast charging mobile power supplies. In addition, with the widespread use of electronic products, users' demands for simultaneous charging of multiple devices have gradually increased, and multi-port fast charging technology has gradually occupied the mainstream of charging applications. However, due to the relatively large output power of fast charging, if multiple output ports output fast charging current at the same time, the total output power will be too large, which will not only increase the design cost, but also increase the design difficulty.

In order to control costs, some existing power supply devices usually use a single power converter, and only support fast charging output when only one output interface is connected to the charging load; it is turned off when more than one output interface is connected to the charging load Fast charging output, when only one output interface is connected to the charging load, the fast charging output will resume. However, in this fast charging output mode, if some charging loads are fully charged but still connected to the output interface, even if only one charging load is not fully charged, the power supply device cannot output fast charging to the not fully charged charging loads. The charging voltage will result in a longer charging time for the charging load, affecting the user experience.

In order to shorten the charging time of the charging load, some existing power supply devices also judge whether the charging load is fully charged by monitoring whether the output current of the output interface is lower than a preset threshold, and actively shut down the corresponding charging when judging that the charging load is fully charged output. In this way, when only one charging load is not fully charged, the power supply device can actively output the fast charging voltage to the charging load that is not fully charged, thereby shortening the charging time of the charging load. However, during the charging process, the electronic device may have a high temperature due to some special usage conditions. For the sake of safe charging, some electronic devices with a self-protection system will actively suspend charging when they are not fully charged, and Continue charging after it returns to its normal temperature. If the above-mentioned method of detecting the output current of the output interface is used to determine whether the electronic device is fully charged, misjudgment may occur when the electronic device suspends charging and the corresponding charging output will be turned off in advance, causing the electronic device to stop charging before it is fully charged. , thus affecting the user experience.

SUMMARY OF THE INVENTION

The present application provides a multi-port charging control circuit and method, a charging chip and a power supply device, which can accurately and effectively detect the state of the charging load, and dynamically and flexibly control the on-off state of the charging path according to the detection result, so as to optimize charging efficiency and improve user experience.

A first aspect of the present application provides a multi-port charging control circuit, where the multi-port charging control circuit includes a plurality of interface modules, a voltage conversion module, and a charging control module. Wherein, each of the interface modules is respectively used to connect to the charging load. The voltage conversion module and the plurality of interface modules are respectively electrically connected to form a plurality of charging paths. The charging control module is electrically connected to the plurality of charging paths and the voltage conversion module, respectively. The charging control module is used for detecting the output current of each charging channel in the conductive state when at least two charging channels are in the conductive state. The charging control module is further configured to determine whether the output current of each charging path in an on state satisfies a first preset condition, wherein the first preset condition is that the output current of the charging path is lower than a preset value current threshold. The charging control module is further configured to, when it is determined that the output current of the one or more charging paths in the conducting state satisfies the first preset condition, the one or more charging paths that satisfy the first preset condition The charging path is set as the target charging path, and it is determined whether the state of the target charging load connected to the target charging path satisfies a second preset condition, wherein the second preset condition includes that the target charging load is unplugged , or the target charging load is not unplugged but the output current of the target charging path remains below the preset current threshold for a duration exceeding a first preset time threshold. The charging control module is further configured to disconnect the target charging path when it is determined that the state of the target charging load satisfies the second preset condition.

A second aspect of the present application provides a charging chip including the multi-port charging control circuit of the first aspect.

A third aspect of the present application provides a fast charging power supply device, the fast charging power supply device includes a power input interface, a plurality of USB interfaces, and the multi-port charging control circuit described in the first aspect or the charging chip described in the second aspect. . The power input interface is used for receiving an input voltage provided by an external power source. The multiple USB ports are used for electrical connection with multiple charging loads one by one. The multi-port charging control circuit or the charging chip is electrically connected between the power input interface and the plurality of USB interfaces, and is used for receiving the input voltage and providing a charging voltage for the plurality of charging loads. Wherein, the input terminal of the multi-port charging control circuit or the voltage conversion module of the charging chip is electrically connected to the power input interface, and the multi-port charging control circuit or the plurality of interface modules of the charging chip is electrically connected to the power input interface. The multiple USB ports are electrically connected one by one.

A fourth aspect of the present application provides a multi-port charging control method, which is applied to the multi-port charging control circuit described in the first aspect or the charging chip described in the second aspect. The multi-port charging control method includes: when at least two charging paths are in a conductive state, detecting the output current of each charging path in the conductive state; and judging whether the output current of each charging path in the conductive state is A first preset condition is met, wherein the first preset condition is that the output current of the charging path is lower than a preset current threshold; when it is determined that the output current of one or more charging paths in an on state satisfies the When the first preset condition is used, the one or more charging paths that satisfy the first preset condition are set as the target charging path, and it is judged whether the state of the target charging load connected to the target charging path satisfies the first preset condition. Two preset conditions, wherein the second preset condition includes that the target charging load is unplugged, or the target charging load is not unplugged but the output current of the target charging path remains below the preset value setting the duration of the current threshold value to exceed a first preset time threshold value; and when it is determined that the state of the target charging load satisfies the second preset condition, disconnecting the target charging path.

When detecting that the output current of the target charging path is lower than the preset current threshold, the multi-port charging control circuit of this embodiment continues to detect whether the target charging load is unplugged, which can effectively avoid the target charging The load is misjudged to be unplugged due to its own reason, so that the target charging load can resume charging after suspending charging for a period of time, so as to improve the user experience of charging.

In addition, the multi-port charging control circuit of this embodiment can automatically disconnect the target charging path when the output current of the target charging path remains below the preset current threshold for a duration exceeding a first preset time threshold , so that when only one charging load is not fully charged, the partially charged charging load can be charged in the fast charging mode, so as to improve the charging speed of the partially charged charging load and improve the user's charging experience.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of functional modules of a multi-port charging control circuit according to an embodiment of the present application.

FIG. 2 is a schematic diagram of functional modules of the detection module shown in FIG. 1 .

FIG. 3 is a schematic diagram of a circuit structure of the plug-in detection sub-module shown in FIG. 2 .

FIG. 4 is a schematic diagram of functional modules of a charging chip according to an embodiment of the present application.

FIG. 5 is a schematic diagram of functional modules of a power supply device according to an embodiment of the present application.

FIG. 6 is a flowchart of a multi-port charging control method provided by an embodiment of the present application.

FIG. 7 is a flowchart of a method for detecting a state of a charging load according to an embodiment of the present application.

Description of main component symbols

The following specific embodiments will further illustrate the present application in conjunction with the above drawings.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Wherein, the accompanying drawings are only used for exemplary description, and are only schematic diagrams, which should not be construed as limitations on the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art. The terms used in the specification of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application.

FIG. 1 is a schematic diagram of functional modules of a multi-port charging control circuit according to an embodiment of the present application. As shown in FIG. 1 , the multi-port charging control circuit 100 includes a voltage conversion module 11 , a plurality of interface modules 121 , and a charging control module 13 . Wherein, each of the interface modules 121 is used to connect to the charging load 200 respectively. For example, the interface module 121 may adopt a Type-A or TYPE-C interface. It can be understood that, a plurality of the interface modules 121 may be configured as the same type of interface, or may be configured as different types of interfaces. The multiple charging loads 200 shown in FIG. 1 correspond to different electronic devices, and the types of the electronic devices may be the same or different. For example, the electronic devices may be mobile phones, tablet computers, and the like. For the convenience of description, in FIG. 1 of this embodiment, a plurality of the interface modules 121 are marked with the same component symbols, and a plurality of charging loads 200 are also marked with the same component symbols.

The voltage conversion module 11 is used for receiving an input voltage provided by an external power supply (not shown in the figure), and converting the input voltage into a suitable output voltage for output. For example, the input voltage provided by the external power source may be 220V AC mains, and accordingly, the voltage conversion module 11 may be used to convert the AC input voltage provided by the external power source into a DC output voltage.

The output terminals of the voltage conversion module 11 are electrically connected to the plurality of interface modules 121 respectively to form a plurality of charging paths 12 . The plurality of charging paths 12 are used to output charging voltages to the plurality of connected charging loads 200 through the corresponding interface modules 121 . For the convenience of description, the embodiments of the present application mainly take the two charging paths 12 as an example to introduce the structure of the multi-port charging control circuit 100 of the present application in detail.

In this embodiment, the charging control module 13 is electrically connected to the plurality of charging paths 12 respectively, and the charging control module 13 is used to control the on-off state of the plurality of charging paths 12 . Specifically, as shown in FIG. 1 , the multi-port charging control circuit 100 further includes a plurality of switch modules 122 , and the plurality of switch modules 122 are in one-to-one correspondence with the plurality of charging paths 12 , and each switch module 122 is disposed in the on the corresponding charging path 12 . That is, the plurality of switch modules 122 are electrically connected between the voltage conversion module 11 and the plurality of interface modules 121 one by one. Each switch module 122 is used to control the on-off state of the corresponding charging path 12 . The switch module 122 may use electronic switch devices such as MOS transistors, triodes, and relays, and the type of the switch module 122 is not limited in this embodiment.

The charging control module 13 is electrically connected to the plurality of switch modules 122 respectively, and the charging control module 13 controls the on-off states of the plurality of charging paths 12 by controlling the on-off states of the plurality of switch modules 122 . In this embodiment, when the interface module 121 is not connected to the charging load 200, the switch module 122 is in a disconnected state.

In this embodiment, the charging control module 13 is further configured to detect the electrical parameters of each charging path 12 and the state of the charging load 200 connected to each interface module 121 . Specifically, as shown in FIG. 1 , the multi-port charging control circuit 100 further includes a plurality of detection modules 14 , and the plurality of detection modules 14 are one-to-one with the plurality of interface modules 121 and the plurality of charging paths 12 . correspond. The charging control module 13 is configured to detect the electrical parameters of the plurality of charging paths 12 and the state of the charging load 200 corresponding to the plurality of interface modules 121 through the plurality of detection modules 14 .

In this embodiment, as shown in FIG. 2 , each of the detection modules 14 includes a plug-in detection sub-module 141 , a fast-charging protocol detection sub-module 142 , and a current detection sub-module 143 . The plug-in detection sub-module 141 is electrically connected with the corresponding interface module 121, and the plug-in detection sub-module 141 is used to detect the plug-in state of the charging load 200 corresponding to the corresponding interface module 121, and use the detection result feedback to the charging control module 13 .

The circuit structure and working principle of the plug-in detection sub-module 141 will be briefly introduced below with reference to FIG. 3 . FIG. 3 is a schematic diagram of a circuit structure of the plug-in detection sub-module 141 . It can be understood that the structure of the plugging detection sub-module 141 is not limited to the structure shown in FIG. 3 .

As shown in FIG. 3 , the plugging detection sub-module 141 includes a comparator C1 , a resistor R1 , and switch tubes Q1 and Q2 . Wherein, the positive input terminal+ of the comparator C1 is electrically connected to the DP pin or DM pin of the corresponding interface module (the DP pin is taken as an example in FIG. 3), and the positive input terminal+ of the comparator C1 is also The resistor R1 and the switch tubes Q1 and Q2 are electrically connected to the output terminal (not shown) of a voltage source to receive an input voltage of 2.7V. The negative input terminal of the comparator C1 is electrically connected to the output terminal (not shown) of a reference voltage generating circuit to receive a reference voltage of 2V. The on-off states of the switches Q1 and Q2 can be controlled by a control signal det_en applied to the control terminals of the switches Q1 and Q2. Wherein, the control signal det_en can be generated by, for example, the charging control module 13 .

When no charging load is inserted into the interface module, the DP pin or the DM pin is floating, and its voltage is pulled up to 2.7V through the resistor R1. At this time, the positive input terminal + of the comparator C1 receives a voltage of 2.7V, which is higher than the reference voltage of 2V received by the negative input terminal -. According to the working principle of the comparator, the comparator C1 outputs a high-level signal "1". That is, when the charging load is not inserted into the interface module, the detection signal det_flag output by the comparator C1 is a high-level signal "1".

When a charging load (not shown in the figure) is inserted into the interface module, the ground impedance of the charging load (not shown in the figure) and the resistor R1 form a voltage divider circuit. According to the voltage division principle, the DP pin or The voltage on the DM pin is pulled down below 2V by the ground impedance of the charging load. At this time, the positive input terminal of the comparator C1 receives a voltage lower than 2V, and the comparator C1 outputs a low-level signal "0". That is, when a charging load is inserted into the interface module, the detection signal det_flag output by the comparator C1 is a low-level signal "0".

In this way, the charging control module 13 can detect the plugging state of the charging load corresponding to the corresponding interface module 121 through the detection signal det_flag fed back by the plugging detection sub-module 141 .

It can be understood that when the plug-in detection sub-module 141 detects that a charging load 200 is inserted in the corresponding interface module 121, and feeds back the detection signal det_flag to the charging control module 13, the charging control module 13 , the corresponding charging path 12 can be turned on according to the detection signal det_flag fed back by the plug-in detection sub-module 141 , so as to output the charging voltage to the connected charging load 200 .

The fast charging protocol detection sub-module 142 is electrically connected to the corresponding interface module 121, and the fast charging protocol detection sub-module 142 is used to detect the fast charging protocol signal of the charging load connected to the corresponding interface module 121, and will detect The result is fed back to the charging control module 13 . It can be understood that, for different types of interface modules, the circuit structure of the fast charging protocol detection sub-module 142 can also be changed accordingly.

Wherein, when the fast charging protocol detection sub-module 142 detects the fast charging protocol signal, the charging control module 13 can determine that the corresponding charging load 200 supports the fast charging protocol, and can detect the sub-module 142 according to the fast charging protocol The feedback fast charging protocol signal identifies the fast charging voltage required or requested by the corresponding charging load 200 . On the contrary, when the fast charging protocol detection sub-module 142 does not detect the fast charging protocol signal, the charging control module 13 may determine that the corresponding charging load 200 does not support the fast charging protocol, and may determine that the corresponding charging load 200 requests the fast charging protocol. is the normal charging voltage.

The current detection sub-module 143 is electrically connected to the corresponding charging channel 12 , and the current detection sub-module 143 is used for detecting the output current of the corresponding charging channel 12 and feeding back the detection result to the charging control module 13 . In this way, after the charging path 12 is turned on, the charging control module 13 can use the corresponding current detection sub-module 143 to detect the output current of the charging path 12 in the conductive state in real time or at a preset frequency.

When in use, the charging control module 13 is used to detect in real time or at a preset frequency whether the interface module 121 corresponding to the charging path 12 in the disconnected state has a charging load connected, and when it is detected that a charging load is connected to the interface module 121 When the charging path 12 in the off state is in the off state, the charging path in the off state and a charging load is connected is turned on. In this embodiment, as described above, the charging control module 13 can detect the interface module corresponding to the charging channel 12 in the disconnected state through the plug-in detection sub-module 141 corresponding to the charging channel 12 in the disconnected state 121 Whether there is a charging load connected.

In this embodiment, the charging control module 13 is further configured to monitor the number of the charging paths 12 in the conducting state in real time or at a preset frequency during use.

As shown in FIG. 1 , the charging control module 13 is also electrically connected to the voltage conversion module 11 , and the charging control module 13 is further configured to control all the charging paths 12 when at least two charging paths 12 are in a conducting state. The voltage conversion module 11 outputs a preset normal charging voltage. Wherein, the common charging voltage can be set to 5V.

Due to the large output power of fast charging, for multi-port fast charging power supply equipment, if multiple output ports output fast charging current at the same time, the total output power is too large, which will not only increase the design cost, but also increase the design difficulty. The multi-port charging control circuit 100 of the present embodiment outputs a preset common charging voltage to charge each connected charging load when at least two of the charging paths 12 are in a conducting state, so that a simple circuit structure can be used to effectively Therefore, the problem that the total output power is too large due to the simultaneous output of fast charging currents by multiple interface modules 121 is avoided, and the design and manufacturing costs are not increased.

Further, the charging control module 13 is further configured to detect, in real time or at a preset frequency, the output current of each charging channel 12 in the conductive state when at least two of the charging channels 12 are in the conductive state. In this embodiment, as described above, the charging control module 13 can detect the output current of the charging path 12 that is turned on through the current detection sub-module 143 .

Further, the charging control module 13 is further configured to determine whether the output current of each of the charging paths 12 in the conducting state satisfies the first preset condition. The first preset condition is that the output current of the charging path changes from higher than a preset current threshold to lower than the preset current threshold. Wherein, the preset current threshold may be set to, for example, 10 mA or 100 mA, and the specific value of the preset current threshold is not limited in this embodiment.

The charging control module 13 is further configured to, when it is determined that the output current of one or more charging paths 12 in the conducting state satisfies the first preset condition, the one or more that satisfies the first preset condition. A plurality of charging paths 12 are set as target charging paths, and it is determined whether the state of the target charging load connected to the target charging path satisfies the second preset condition, and after determining that the state of the target charging load satisfies the second preset condition In a preset condition, the target charging path is disconnected.

Wherein, in this embodiment, the second preset condition may include that the target charging load is unplugged. In this embodiment, as described above, the charging control module 13 can detect the charging connected to the charging channel 12 in the conductive state through the plug-in detection sub-module 141 corresponding to the charging channel 12 in the conductive state Whether the load was unplugged or removed.

It can be understood that the multi-port charging control circuit 100 of this embodiment disconnects the target charging path when detecting that the target charging load is pulled out, so that when there is only one conductive charging circuit left, the The charging load connected to the conductive charging path can be charged in a fast charging mode, so as to speed up the charging speed of the charging load.

In this embodiment, the second preset condition may further include that the target charging load is not unplugged but the output current of the target charging path remains below the preset current threshold for a duration exceeding the first Preset time threshold t1. The first preset time threshold may be set to, for example, 10 minutes, 20 minutes, or 30 minutes, and the specific value of the first preset time threshold is not limited in this embodiment.

It can be understood that the multi-port charging control circuit 100 may further include a timer module (not shown), and the timer module is used to record the duration. It can be understood that, the timer module may also be set in the charging control module 13, and the setting of the timer module is not limited in this embodiment of the present application.

During the charging process, some electronic devices may cause their own temperature to be high due to some special usage conditions. For example, the electronic device is charged in a place with a high ambient temperature, or the user uses the electronic device to play games while playing games. Charging, when electronic devices detect that their temperature is too high, for the sake of safe charging, these electronic devices may actively suspend charging if they are not fully charged, and resume charging after they return to normal temperature. If only by detecting the output current of the charging path to determine whether the electronic device is fully charged, it is likely that a misjudgment occurs when the electronic device suspends charging and the corresponding charging path is disconnected in advance, causing the electronic device to stop charging before it is fully charged. affect the user experience.

When detecting that the output current of the target charging path is lower than the preset current threshold, the multi-port charging control circuit 100 of this embodiment continues to detect whether the target charging load is unplugged, which can effectively avoid the target charging The charging load suspends charging for its own reasons and is mistakenly judged to be unplugged, so that the target charging load can resume charging after suspending charging for a period of time, so as to improve the user experience of charging.

In addition, the duration that the output current of the target charging path remains below the preset current threshold exceeds the first preset time threshold, indicating that the target charging load may be fully charged. If the target charging path continues to be in an on state for a long time, even if only one charging load is not fully charged, the charging load that is not fully charged still cannot be charged in the fast charging mode.

By using the multi-port charging control circuit 100 of this embodiment, the target can be automatically disconnected when the output current of the target charging path remains below the preset current threshold for a duration exceeding a first preset time threshold A charging path, so that when only one charging load is not fully charged, the partially charged charging load can be charged using the fast charging mode, so as to improve the charging speed of the partially charged charging load and improve the usage of user charging experience.

To sum up, the multi-port charging control circuit 100 provided in this embodiment can accurately and effectively detect the plug-in state and the fully charged state of the charging load corresponding to each charging path, and can dynamically and flexibly detect the state of the charging load according to the detection result. The output voltage of the voltage conversion module can be adjusted to the ground, so that the charging efficiency can be optimized, and the user experience of charging can be improved.

In another embodiment, the first preset condition may be set that the output current of the target charging path changes from higher than a preset current threshold value to lower than the preset current threshold value, and the output current of the target charging path The output current remains below the preset current threshold for a duration exceeding a second preset time threshold t0. In this way, for short-term abnormal charging situations, such as the situation where the user touches the target charging load and affects the circuit connection, frequent triggering of the detection of the fully charged state and the unplugged state of the target charging load can be avoided, and at the same time, it can be avoided. The target charging path is disconnected prematurely.

Wherein, the second preset time threshold t0 is smaller than the first preset time threshold t1. The second preset time threshold t0 may be set to, for example, 8 seconds, 16 seconds, 32 seconds, etc., and the specific value of the second preset time threshold is not limited in this embodiment.

The operation of the charging control module 13 for judging whether the state of the target charging load connected to the target charging path satisfies the second preset condition will be described in detail below.

In this embodiment, the charging control module 13 first determines whether the target charging load is in a fast charging request state. It can be understood that the charging control module 13 can detect the fast charging protocol signal of the target charging load through the fast charging protocol detection sub-module 142 corresponding to the target charging path to determine whether the target charging load is not. In fast charge request state. Wherein, if the fast charging protocol signal of the target charging load is detected, it can be determined that the target charging load is in a fast charging request state; on the contrary, if the fast charging protocol signal of the target charging load is not detected, it can be determined that The target charging load is not in a fast charging request state.

In this embodiment, when the target charging load is in a fast charging request state, the charging control module 13 may determine that the target charging load is not unplugged. It can be understood that the target charging load is in the fast charging request state, indicating that the target charging load has not been unplugged or removed, and the target charging load may have been fully charged, or may be suspended due to abnormal conditions. Charge. It should be noted that, in this embodiment, since at least two of the charging paths are in a conducting state, the voltage conversion module 11 outputs a normal charging voltage, so all the charging loads connected are charging voltage to charge. In this way, the fact that the target charging load is in the fast charging request state only means that the target charging load supports fast charging or has a demand for fast charging, but the target charging load is not necessarily in the fast charging mode, and the target charging load is also in the fast charging mode. It can be in normal charging mode, that is, non-fast charging mode.

Further, when the target charging load is not in the fast charging request state, the charging control module 13 continues to detect whether the target charging load has been pulled out.

It is understandable that the charging load may or may not support fast charging. For a charging load that does not support fast charging, the fact that the target charging load is not in the fast charging request state does not mean that the target charging load is unplugged. Therefore, further plugging and unplugging detection is required to accurately determine Whether the target charging load has really been unplugged.

As described above, the charging control module 13 can detect whether the target charging load is unplugged or removed through the plug-in detection sub-module 141 corresponding to the target charging path 12 .

Please also refer to Figure 3. When the charging load is just inserted into the interface module, since the corresponding charging path has not output the fast charging voltage to the charging load, the voltage of the corresponding interface module's DP pin or DM pin will be lower than 2V. The comparator C1 will output a low level signal "0". Therefore, the insertion of the charging load can be accurately detected by the insertion and extraction detection sub-module 141 .

During the charging process, if there is only one charging load left and the charging load is in the fast charging mode, even if the charging load is fully charged or charging is suspended, the voltage of the DP pin or DM pin of the corresponding interface module may also change. Above 2V, the comparator C1 may output a high level signal "1". At this time, the charging control module 13 cannot accurately judge whether the charging load is unplugged only through the detection signal det_flag fed back by the plugging detection sub-module 141 , and may misjudge that the charging load is unplugged.

The multi-port charging control circuit 100 of this embodiment first detects the fast charging protocol signal of the target load before performing the plug-in detection on the target load, so as to determine whether the target charging load is in a fast charging request state. It can eliminate the situation that the charging load is in the fast charging mode of fully charged or suspended charging but is mistakenly judged to be pulled out, so as to realize the effective and accurate detection of the plugging and unplugging state of the charging load, and avoid whether the charging load is unplugged or not. Therefore, the target charging path is prevented from being disconnected in advance due to misjudgment.

Further, when it is determined that the target charging load is not unplugged, the charging control module 13 continues to determine whether the duration that the output current of the target charging path remains below the preset current threshold exceeds the first threshold. a preset time threshold.

It can be understood that, by judging whether the duration exceeds the first preset time threshold, the situation that the target charging path is disconnected in advance due to the suspension of charging of the target charging load can be effectively avoided, and the situation can also be avoided. The target charging path is in a conducting state for a long time when the target charging load is fully charged. In this way, after the charging load is suspended for a period of time, the charging load that is not fully charged can resume charging.

Further, when the duration exceeds the first preset time threshold, or when it is determined that the target charging load has been unplugged, the charging control module 13 determines that the state of the target charging load satisfies the The second preset condition is to disconnect the target charging path to stop the voltage output to the target charging path.

In this way, when the state of the charging load connected to one or more of the conductive charging paths satisfies the second preset condition, the charging control module 13 can automatically disconnect the one or more conductive paths. The open charging path makes the remaining conductive charging paths have the opportunity to obtain a fast charging voltage, so as to shorten the charging time.

It can be understood that, in this embodiment, it is only necessary to wait for the first preset time threshold before disconnecting the target charging path when the target charging load is not unplugged, and when it is determined that the target charging load has been When it is pulled out, the target charging path can be immediately disconnected without waiting for the first preset time threshold.

In this embodiment, the charging control module 13 is further configured to obtain the target charging voltage requested by the charging load connected to the charging channel in the conductive state when only one charging channel is in the conductive state, and control the charging channel in the conductive state. The voltage conversion module 11 adjusts the output voltage to the target charging voltage, so that the charging load connected to the charging path in the conducting state can be charged at the target charging voltage.

The charging control module 13 can detect the fast charging protocol signal of the charging load connected to the charging path in the conducting state through the corresponding fast charging protocol detection sub-module 142, and determine the fast charging protocol signal according to the fast charging protocol signal. corresponding target charging voltage.

It can be understood that, when only one of the charging paths is in a conductive state, the charging load connected to the charging path in the conductive state does not necessarily require a fast charging voltage. If the charging load requests a normal charging voltage, it means that the charging load does not support the fast charging protocol, and the voltage conversion module 11 can continue to output the normal charging voltage to charge the corresponding charging load. If the charging load requests a fast charging voltage, it means that the charging load supports the fast charging protocol, and the charging control module 13 can control the voltage conversion module 11 to output the corresponding fast charging voltage to charge the corresponding charging load. Shorten the charging time of the corresponding charging load.

It can be understood that when only one of the charging paths is in an on state and the voltage conversion module 11 outputs a fast charging voltage, if there is a charging load connected to other charging paths, the charging control module 13 can control all the charging paths. The voltage conversion module 11 adjusts the output voltage to the normal charging voltage.

To sum up, the multi-port charging control circuit 100 provided in this embodiment can automatically and flexibly adjust the output voltage by detecting the state of the connected charging load, so that when at least two charging paths 12 are turned on The fast charging function is suspended when in the state, so as to effectively avoid the problem that the total output power is too large due to the simultaneous output of fast charging current by multiple interface modules; when only one charging channel 12 is in the conducting state, the fast charging function is resumed, so that the The most efficient charging method can speed up the charging speed of the charging load, achieve the effect of optimizing the charging efficiency, and also better take into account the user experience.

Further, the multi-port charging control circuit 100 provided in this embodiment can effectively identify and distinguish between the charging load being fully charged and being unplugged/removed for the charging path whose charging current is less than the preset current threshold. different states, and for the two different states of fully charged and unplugged/removed, different disconnection strategies are adopted for the corresponding charging paths, so that the user experience of charging can be improved.

In this embodiment, different disconnection strategies refer to taking different times for different states of the target charging load to maintain the conduction state of the corresponding target charging path. For example, when the target charging load has been removed, the corresponding target charging path can be disconnected after a few seconds, ten seconds, or dozens of seconds, thereby reducing the need for other charging loads to be charged in the fast charging mode. Waiting time; when the target charging load is still on the corresponding interface module, the corresponding target charging path can be disconnected after a few minutes, ten minutes, or dozens of minutes, which can effectively avoid whether the charging load is unplugged. false detection.

Further, the multi-port charging control circuit 100 provided in this embodiment can not only quickly identify whether the charging load is removed, but also identify whether the charging load is actually In the case of removal, the corresponding charging channel is quickly disconnected, and the charging load continues to be charged for an extended period of time in the case that the charging load is not removed. This method of extending the charging time is particularly effective for detection schemes with low current detection accuracy, because if the detection accuracy is not high, the preset current threshold needs to be set to a larger value, such as 100mA. At this time, the charging load is at It is almost fully charged, but it may not be fully charged yet. By extending the charging time, the charging load can truly reach a fully charged state. For the above-mentioned situation that the charging load temporarily stops charging due to factors such as abnormal temperature, prolonging the charging time can enable the charging load to resume charging within this time.

The present application also provides a charging chip. As shown in FIG. 4 , the charging chip 400 includes a multi-port charging control circuit 41 . The multi-port charging control circuit 41 may correspond to the multi-port charging control circuit 100 shown in FIG. 1 . For the specific technical details of the multi-port charging control circuit 41 , please refer to the previous section on the multi-port charging control circuit 41 shown in FIG. 1 . For the purpose of saving space and avoiding repetition, the detailed description of the charging control circuit 100 is not repeated here. It can be understood that, the multiple interface modules of the multi-port charging control circuit 41 may correspond to the I/O interfaces on the charging chip.

The application also provides a fast charging power supply device. As shown in FIG. 5 , the power supply device 500 includes a power input interface 51 , a multi-port charging control circuit 52 , and a plurality of USB interfaces 53 . The power input interface 51 is electrically connected to the multi-port charging control circuit 52, and the power input interface 51 is used to receive an external power supply, such as an input voltage provided by 220V AC mains, to charge the multi-port Control circuit 52 provides the input voltage.

The multiple USB ports 53 are used for electrical connection with multiple charging loads, such as mobile phones, tablet computers, etc. one by one. In this embodiment, the USB interface 53 includes a USB TYPE-A interface and a USB TYPE-C interface. Wherein, the USB interface 53 is used for electrically connecting with the charging load through the USB charging cable.

The multi-port charging control circuit 52 is used to charge the connected charging load. In this embodiment, the multi-port charging control circuit 52 may correspond to the multi-port charging control circuit 100 shown in FIG. The related specific description of the multi-port charging control circuit 100 shown above is not repeated here in order to save space and avoid repetition. It can be understood that the multi-port charging control circuit 52 may be provided in the charging chip.

Wherein, the multi-port charging control circuit 52 is electrically connected between the power input interface 51 and the plurality of USB interfaces 53 for receiving the input voltage and providing charging voltage for the plurality of charging loads. Specifically, the input end of the voltage conversion module of the multi-port charging control circuit 52 is electrically connected to the power input interface 51 , and the plurality of interface modules of the multi-port charging control circuit 52 are connected to the plurality of USB interfaces 53 . an electrical connection.

The power supply device 500 may be a fast-charging mobile power supply, a fast-charging adapter, or the like.

FIG. 6 is a flowchart of a multi-port charging control method provided by an embodiment of the present application. The multi-port charging control method can be applied to the multi-port charging control circuit 100 shown in FIG. 1 or the charging chip shown in FIG. 4 . It should be noted that the multi-port charging control method in this embodiment is not limited to the steps and sequences in the flowchart shown in FIG. 6 . Steps in the illustrated flowcharts may be added, removed, or changed in order according to different needs.

In this embodiment, as shown in FIG. 6 , the multi-port charging control method includes the following steps.

Step 601: Detect whether the interface module corresponding to the charging channel in the disconnected state has a charging load connected. When it is detected that a charging load is connected to the charging channel in the disconnected state, step 603 is performed; when it is not detected that the charging load is connected to the charging channel in the disconnected state, step 602 is performed.

In step 602, it is determined whether any charging path is in a conducting state. When there is a charging channel in the conductive state, go to step 604; when no charging channel is in the conductive state, go back to the step 601, and continue to detect whether the interface module corresponding to the charging channel in the disconnected state has a charging load connected. .

Step 603, a charging path that is in an off state and has a charging load connected to is turned on.

Step 604 , monitor the number of charging paths in the conducting state, and determine whether only one charging path is in the conducting state. When at least two of the charging paths are in the conducting state, step 605 is executed; when only one charging path is in the conducting state, step 610 is executed.

Step 605, controlling the voltage conversion module to output a preset normal charging voltage.

Step 606: Detect the output current of each charging channel in the on state.

Step 607, judging whether the output current of each charging path in the on state meets the first preset condition. Wherein, the first preset condition is that the output current of the charging path is lower than a preset current threshold.

Optionally, in another embodiment, the first preset condition may be set that the output current of the charging path is lower than a preset current threshold, and the output current of the charging path is kept below the preset current threshold. The duration of the current threshold is set to exceed the second preset time threshold.

If the output current of the one or more charging paths in the on state meets the first preset condition, set the one or more charging paths that satisfy the first preset condition as the target charging path, and execute step 608 ; If the output currents of the charging paths in the conducting state do not meet the first preset condition, return to step 606 to continue to detect the output currents of the charging paths that are in the conducting state.

Step 608, judging whether the state of the target charging load connected to the target charging path satisfies the second preset condition.

Wherein, the second preset condition includes that the target charging load is unplugged, or the target charging load is not unplugged but the output current of the target charging path remains below the preset current threshold for a continuous period of time The time exceeds the first preset time threshold. Wherein, the first preset time threshold is greater than the first preset time threshold.

If the state of the target charging load satisfies the second preset condition, execute step 609; if the state of the target charging load does not meet the second preset condition, return to step 606, and continue to detect that it is on The output current of each charging path in the state.

Step 610: Obtain the target charging voltage requested by the charging load connected to the charging path in the on state, and control the voltage conversion module to adjust the output voltage to the target charging voltage.

For the specific technical details of steps 601 to 610 in this embodiment, reference may be made to the description of the related technical details of the embodiment shown in FIG. 1 , which will not be repeated here.

When detecting that the output current of the target charging path is lower than the preset current threshold, the multi-port charging control method of this embodiment continues to detect whether the target charging load is unplugged, which can effectively avoid the target charging The load is misjudged to be unplugged due to its own reason, so that the target charging load can resume charging after suspending charging for a period of time, so as to improve the user experience of charging.

In addition, the multi-port charging control method of this embodiment can automatically disconnect the target charging path when the output current of the target charging path remains below the preset current threshold for a duration exceeding a first preset time threshold , so that when only one charging load is not fully charged, the partially charged charging load can be charged in the fast charging mode, so as to improve the charging speed of the partially charged charging load and improve the user's charging experience.

In addition, the multi-port charging control method provided in this embodiment can automatically and flexibly adjust the output voltage by detecting the state of the connected charging load, so as to suspend fast charging when at least two charging paths are in a conducting state In order to effectively avoid the problem that the total output power is too large due to the simultaneous output of fast charging current by multiple interface modules; the fast charging function can be restored when only one charging path is in a conducting state, so that the most efficient charging method can be used. Speed up the charging speed of the charging load to achieve the effect of optimizing the charging efficiency, and at the same time, it can better take into account the user experience.

FIG. 7 is a flowchart of a method for detecting a state of a charging load according to an embodiment of the present application. The method for detecting the state of the charging load can be applied to the multi-port charging control circuit 100 shown in FIG. 1 or the charging chip shown in FIG. 4 .

In this embodiment, as shown in FIG. 7 , the method for detecting the state of the charging load includes the following steps.

Step 701: Detect the output current of each charging channel in an on state.

Step 702 , determine whether the output current of each charging path in an on state is lower than a preset current threshold. If the output current of the one or more charging paths in the conducting state is lower than the preset current threshold, set the one or more charging paths whose output current is lower than the preset current threshold as the target charging path, And go to step 703; if the output current of each charging path in the on state is not lower than the preset current threshold, then return to the step 701, continue to detect the output current of each charging path in the on state .

Step 703: Start a timer to start timing, that is, to count the duration t that the output current of the target charging path is kept below the preset current threshold.

Step 704: Determine whether the duration t exceeds a second preset time threshold t0. If the duration t exceeds the second preset time threshold t0, step 708 is executed; if the duration t does not exceed the second preset time threshold t0, step 705 is executed.

Step 705, continue to detect the output current of the target charging channel.

Step 706: Determine whether the output current of the target charging path is lower than a preset current threshold. If the output current of the target charging path is lower than the preset current threshold, return to step 704, and continue to determine whether the duration t exceeds the second preset time threshold t0; if the output current of the target charging path If the current is not lower than the preset current threshold, it indicates that the target charging load resumes charging. At this time, step 707 is executed.

In step 707, the timer is reset to zero, and the process returns to the step 701 to continue to detect the output current of each charging channel in the on state.

Step 708: Determine whether the target charging load is in a fast charging request state. If the target charging load is in the fast charging request state, it is determined that the target charging load is still in the connected state and has not been unplugged. At this time, step 712 is executed; if the target charging load is not in the fast charging request state, then Step 709 is executed.

Step 709, performing plug-in detection on the target charging load.

Step 710, determine whether the target charging load has been unplugged. If the target charging load has not been unplugged, execute the step 712; if the target charging load has been unplugged, execute the step 711.

Step 711: Disconnect the target charging path.

Step 712: Determine whether the duration t exceeds a first preset time threshold t1. If the duration t exceeds the first preset time threshold t1 , the flow jumps to the step 711 ; if the duration t does not exceed the first preset time threshold t1 , execute the step 713 .

Step 713, continue to detect the output current of the target charging channel.

Step 714: Determine whether the output current of the target charging path is lower than a preset current threshold. If the output current of the target charging path is lower than the preset current threshold, return to step 708 to continue to determine whether the target charging load is in a fast charging request state; if the output current of the target charging path is not low At the preset current threshold, it is indicated that the target charging load resumes charging, and at this time, the process jumps to the step 707 .

The steps 701 to 714 in this embodiment are specific steps of the steps 606 to 609 of the embodiment shown in FIG. 6 . For the specific technical details, please refer to the description of the relevant technical details of the embodiment shown in FIG. 1 , which will not be performed here. Repeat.

It should be noted that the method for detecting the state of the charging load in this embodiment is not limited to the steps and sequences in the flowchart shown in FIG. 7 . Steps in the illustrated flowcharts may be added, removed, or changed in order according to different needs. For example, according to different needs, the steps 704-706 can be removed.

In the method for detecting the state of a charging load in this embodiment, before performing plug-in detection on the target load, the fast charging protocol signal of the target load is detected to determine whether the target charging load is in a fast charging request state, It can eliminate the situation that the charging load is in the fast charging mode of fully charged or suspended charging but is mistakenly judged to be pulled out, so as to realize the effective and accurate detection of the plugging and unplugging state of the charging load, and avoid whether the charging load is unplugged or not. Therefore, the target charging path is prevented from being disconnected in advance due to misjudgment.

Further, the method for detecting the state of the charging load provided in this embodiment can effectively identify and distinguish between the charging load being fully charged and being unplugged/removed for the charging path whose charging current is less than the preset current threshold. different states, and for the two different states of fully charged and unplugged/removed, different disconnection strategies are adopted for the corresponding charging paths, so that the user experience of charging can be improved.

Further, the method for detecting the state of the charging load provided in this embodiment can not only quickly identify whether the charging load is removed, but also detect whether the charging load is actually In the case of removal, the corresponding charging channel is quickly disconnected, and the charging load continues to be charged for an extended period of time in the case that the charging load is not removed. This method of extending the charging time is particularly effective for detection schemes with low current detection accuracy, because if the detection accuracy is not high, the preset current threshold needs to be set to a larger value, such as 100mA. At this time, the charging load is at It is almost fully charged, but it may not be fully charged yet. By extending the charging time, the charging load can truly reach a fully charged state. For the above-mentioned situation that the charging load temporarily stops charging due to factors such as abnormal temperature, prolonging the charging time can enable the charging load to resume charging within this time.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application rather than limitations. Although the present application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be Any modification or equivalent replacement of the solution should not depart from the spirit and scope of the technical solution of the present application.

Claims (20)

1. A multi-port charging control circuit, comprising: a plurality of interface modules, each of which is used to connect to a charging load; a voltage conversion module, which is electrically connected to the plurality of interface modules respectively to form a plurality of charging paths; and A charging control module, electrically connected to the plurality of charging paths and the voltage conversion module, respectively, and the charging control module is used for: When there are at least two charging paths in the conducting state, detecting the output current of each charging path in the conducting state; judging whether the output current of each charging path in an on state satisfies a first preset condition, wherein the first preset condition is that the output current of the charging path is lower than a preset current threshold; When it is determined that the output current of the one or more charging paths in the conducting state satisfies the first preset condition, the one or more charging paths satisfying the first preset condition are set as the target charging path, and determine whether the state of the target charging load connected to the target charging path satisfies a second preset condition, wherein the second preset condition includes that the target charging load is unplugged or the target charging load is not being unplugged but the output current of the target charging path remains below the preset current threshold for a duration exceeding a first preset time threshold; and When it is determined that the state of the target charging load satisfies the second preset condition, the target charging path is disconnected. 2 . The multi-port charging control circuit according to claim 1 , wherein when the charging control module determines whether the state of the target charging load connected to the target charging path satisfies the second preset condition. 3 . Used for: Determine whether the target charging load is in a fast charging request state; When the target charging load is in a fast charging request state, determining that the target charging load is not unplugged; When the target charging load is not in the fast charging request state, detecting whether the target charging load has been pulled out; When it is determined that the target charging load is not unplugged, determine whether the duration for which the output current of the target charging path remains below the preset current threshold exceeds the first preset time threshold; When the duration exceeds the first preset time threshold, or when it is determined that the target charging load has been unplugged, it is determined that the state of the target charging load satisfies the second preset condition. 3 . The multi-port charging control circuit according to claim 2 , wherein when judging whether the target charging load is in a fast charging request state, the charging control module is used for: 3 . detecting the fast charging protocol signal of the target charging load; When detecting a fast charging protocol signal of the target charging load, determining that the target charging load is in a fast charging request state; and When the fast charging protocol signal of the target charging load is not detected, it is determined that the target charging load is not in a fast charging request state. 4. The multi-port charging control circuit according to any one of claims 1-3, wherein the first preset condition is that the output current of the charging path is lower than the preset current threshold, And the output current of the charging path remains lower than the preset current threshold for a duration exceeding a second preset time threshold; wherein, the second preset time threshold is smaller than the first preset time threshold. 5 . The multi-port charging control circuit according to claim 1 , wherein the charging control module is further configured to detect whether the interface module corresponding to the charging path in the disconnected state is charged or not. 6 . The load is connected, and when it is detected that a charging load is connected to the charging path in the disconnected state, the charging path in the disconnected state and the charging load is connected is turned on. 6. The multi-port charging control circuit according to claim 5, wherein the charging control module is further used for: Monitor the number of charging paths that are on; Controlling the voltage conversion module to output a preset common charging voltage when monitoring that at least two charging paths are in a conducting state; and When it is monitored that only one charging channel is in the conducting state, obtain the target charging voltage requested by the charging load connected to the charging channel in the conducting state, and control the voltage conversion module to adjust the output voltage to the target charging voltage . 7 . The multi-port charging control circuit according to claim 5 , wherein the multi-port charging control circuit further comprises a plurality of switch modules, and the plurality of switch modules are in one-to-one correspondence with the plurality of charging paths, 8 . Each switch module is arranged on the corresponding charging path, the charging control module is also electrically connected to the plurality of switch modules, and the charging control module controls the multiple switch modules by controlling the on-off state of the plurality of switch modules. The on-off state of the charging path. 8 . The multi-port charging control circuit according to claim 5 , wherein the multi-port charging control circuit further comprises a plurality of detection modules, the plurality of detection modules are connected with the plurality of interface modules and the plurality of The charging paths are in one-to-one correspondence, the charging control module is electrically connected to the charging paths through the plurality of detection modules, and the charging control module is used to detect the plurality of charging paths through the detection modules. Electrical parameters of the charging path and states of the charging loads corresponding to the plurality of interface modules. 9 . The multi-port charging control circuit according to claim 8 , wherein each of the detection modules comprises a current detection sub-module electrically connected to the corresponding charging path, and the current detection sub-module is used to detect the corresponding charging path. 10 . output current of the charging path, and feedback the detection result to the charging control module. 10. The multi-port charging control circuit according to claim 8, wherein each of the detection modules comprises a plug-in detection sub-module electrically connected with the corresponding interface module, and the plug-in detection sub-module is used for detecting The plugging and unplugging state of the charging load corresponding to the corresponding interface module, and the detection result is fed back to the charging control module. 11 . The multi-port charging control circuit according to claim 8 , wherein each of the detection modules comprises a fast charging protocol detection sub-module electrically connected with the corresponding interface module, and the fast charging protocol detection sub-module uses 11 . It detects the fast charging protocol signal of the charging load connected to the corresponding interface module, and feeds back the detection result to the charging control module. 12. A charging chip, comprising the multi-port charging control circuit according to any one of claims 1-11. 13. A power supply device comprising: The power input interface is used to receive the input voltage provided by the external power supply; a plurality of USB interfaces for electrically connecting with a plurality of charging loads one by one; and The multi-port charging control circuit according to any one of claims 1-11 or the charging chip according to claim 12, wherein the multi-port charging control circuit or the charging chip is electrically connected to the power input interface and the between the plurality of USB interfaces, for receiving the input voltage and providing a charging voltage for the plurality of charging loads; Wherein, the input terminal of the multi-port charging control circuit or the voltage conversion module of the charging chip is electrically connected to the power input interface, and the multi-port charging control circuit or the plurality of interface modules of the charging chip is electrically connected to the power input interface. The multiple USB ports are electrically connected one by one. 14. The power supply device according to claim 13, wherein the power supply device is a fast charging mobile power supply or a fast charging adapter. 15. A multi-port charging control method, wherein the multi-port charging control method is applied to the multi-port charging control circuit according to any one of claims 1-11 or the charging chip according to claim 12 , the multi-port charging control method includes: Monitor the number of charging paths that are on; When there are at least two charging paths in the conducting state, detecting the output current of each charging path in the conducting state; judging whether the output current of each charging path in an on state satisfies a first preset condition, wherein the first preset condition is that the output current of the charging path is lower than a preset current threshold; When it is determined that the output current of the one or more charging paths in the conducting state satisfies the first preset condition, the one or more charging paths satisfying the first preset condition are set as the target charging path, and determine whether the state of the target charging load connected to the target charging path satisfies a second preset condition, wherein the second preset condition includes that the target charging load is unplugged or the target charging load is not being unplugged but the output current of the target charging path remains below the preset current threshold for a duration exceeding a first preset time threshold; and When it is determined that the state of the target charging load satisfies the second preset condition, the target charging path is disconnected. 16 . The multi-port charging control method according to claim 15 , wherein judging whether the state of the target charging load connected to the target charging path satisfies the second preset condition comprises: 16 . Determine whether the target charging load is in a fast charging request state; When the target charging load is in a fast charging request state, determining that the target charging load is not unplugged; When the target charging load is not in the fast charging request state, detecting whether the target charging load has been pulled out; When it is determined that the target charging load is not unplugged, determine whether the duration for which the output current of the target charging path remains below the preset current threshold exceeds the first preset time threshold; When the duration exceeds the first preset time threshold, or when it is determined that the target charging load has been unplugged, it is determined that the state of the target charging load satisfies the second preset condition. 17. The multi-port charging control method according to claim 16, wherein judging whether the target charging load is in a fast charging request state comprises: detecting the fast charging protocol signal of the target charging load; When detecting a fast charging protocol signal of the target charging load, determining that the target charging load is in a fast charging request state; and When the fast charging protocol signal of the target charging load is not detected, it is determined that the target charging load is not in a fast charging request state. 18 . The multi-port charging control method of claim 15 , wherein the first preset condition is that the output current of the charging path is lower than the preset current threshold, and the output current of the charging path is lower than the preset current threshold. 19 . The duration that the current remains below the preset current threshold exceeds a second preset time threshold; wherein the second preset time threshold is less than the first preset time threshold. 19. The multi-port charging control method according to claim 16, wherein the multi-port charging control method further comprises: Detect whether the interface module corresponding to the charging path in the disconnected state has a charging load connected; When it is detected that a charging load is connected to the charging path in the disconnected state, the charging path in the disconnected state and the charging load is connected is turned on. 20. The multi-port charging control method according to claim 19, wherein the multi-port charging control method further comprises: Monitor the number of charging paths that are on; When monitoring that at least two of the charging paths are in a conducting state, controlling the voltage conversion module to output a preset common charging voltage; and When it is monitored that only one charging channel is in the conducting state, obtain the target charging voltage requested by the charging load connected to the charging channel in the conducting state, and control the voltage conversion module to adjust the output voltage to the target charging voltage .

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