A method and device for controlling current distribution of a multi-output power adapter

Abstract

The present application provides a control method and device for current distribution of a multi-output power adapter, which obtains the load-temperature data of the power adapter and generates a load-temperature scatter plot, fits the load-temperature scatter plot to obtain the load-temperature base of the power adapter, and determines the thermal balance entropy of the power adapter from the load-temperature base; predicts the margin through the limit load capacity of the output interface, the incoming current and the thermal balance entropy of the power adapter, and obtains the load margin prediction value corresponding to the output interface; obtains the battery impact and load temperature data of the device to be charged, determines the charging level value of the device to be charged from the load temperature data and the battery impact, and determines the charging level of the device to be charged according to the charging level value; and adjusts the charging current of the output interface according to the load margin prediction value and the charging level of the device to be charged. The above scheme can be used to allocate appropriate charging current to different devices to be charged without overloading the power adapter.

Description

Technical Field

[0001] The present application relates to the technical field of power adapters, and more specifically, to a control method and device for current distribution of a multi-output power adapter. Background Art

[0002] A power adapter is a device that converts electrical energy from one power type or power specification to other types to meet the power needs of different devices. It is usually used to connect electronic devices (such as laptops, mobile phones, chargers, routers, etc.) to power outlets. A multi-way power adapter usually refers to a power adapter with multiple output channels (sockets or interfaces), allowing users to connect and power multiple devices at the same time. Multi-way power adapters are usually used to meet the power needs of multiple devices.

[0003] A multi-channel power adapter is usually equipped with multiple sockets, allowing users to connect multiple devices at the same time. These sockets may include different types of power interfaces, such as USB, DC socket, AC socket, etc. In the prior art, at different stages of the battery of the device to be charged, in order to achieve fast charging and protect the battery and the power adapter, it is necessary to allocate a suitable charging current to the device to be charged, and different devices to be charged require different charging currents. Therefore, how to allocate a suitable charging current to different devices to be charged while ensuring that the power adapter is not overloaded has become a difficult problem that the industry urgently needs to solve. Summary of the invention

[0004] The present application provides a method and device for controlling current distribution of a multi-output power adapter, which can distribute appropriate charging current to different devices to be charged without overloading the power adapter.

[0005] In a first aspect, the present application provides a method for controlling current distribution of a multi-output power adapter, comprising the following steps:

[0006] Get the load-temperature data of the power adapter;

[0007] Generate a load-temperature scatter plot according to the load-temperature data, fit the load-temperature scatter plot to obtain a load-temperature basis of the power adapter, and then determine the thermal balance entropy of the power adapter from the load-temperature basis;

[0008] For each output interface, a margin prediction is performed based on the maximum load capacity and the incoming line current of the output interface and the thermal balance entropy of the power adapter to obtain a load margin prediction value corresponding to the output interface;

[0009] Obtaining a battery impact amount of the device to be charged (the battery impact amount includes: the battery voltage of the device to be charged, the charge and discharge current of the battery of the device to be charged, and the battery internal resistance of the device to be charged) and load temperature data (the load temperature data represents the temperature data of the device to be charged when it is working), determining a charging stage value of the device to be charged based on the load temperature data and the battery impact amount, and then determining a charging stage of the device to be charged based on the charging stage value;

[0010] The charging current of the output interface is adjusted according to the load margin prediction value and the charging level of the device to be charged.

[0011] In some embodiments, the margin prediction is performed based on the limit carrying capacity of the output interface, the incoming line current, and the thermal balance entropy of the power adapter to obtain the carrying margin prediction value corresponding to the output interface, specifically including:

[0012] Determine the carrying power corresponding to the output interface according to the incoming line current;

[0013] A margin prediction is performed based on the carrying power, the thermal balance entropy of the power adapter and the limit carrying capacity to obtain a carrying margin prediction value corresponding to the output interface.

[0014] In some embodiments, determining the carrying power corresponding to the output interface according to the incoming line current specifically includes:

[0015] Obtaining a load voltage of the power adapter;

[0016] Preset power factor;

[0017] The carrying power corresponding to the output interface is determined by the power factor, the incoming line current and the load voltage of the power adapter.

[0018] In some embodiments, the load-temperature scatter plot is fitted using a polynomial interpolation method.

[0019] In some embodiments, determining the charging stage value of the device to be charged based on the load temperature data and the battery impact value specifically includes:

[0020] Constructing a battery equivalent model of the device to be charged according to the battery impact amount;

[0021] The battery equivalent model can be determined in a variety of ways. Here, the Thevenin equivalent circuit model is used as an example to illustrate:

[0022] The Thevenin equivalent circuit model is used, which consists of the following components:

[0023] Voltage source (Voc): represents the open circuit voltage of the battery, which is related to the remaining capacity (SOC).

[0024] Ohmic internal resistance (Ro): The DC internal resistance of the battery.

[0025] RC parallel network: simulates polarization effect, including polarization resistance (Rp) and polarization capacitance (Cp).

[0026] Initialize the model parameters by battery influence:

[0027] Voc(SOC): SOC-open circuit voltage relationship curve is calibrated through experiments.

[0028] RoRo: The ratio of instantaneous voltage change to current is calculated through pulse discharge test.

[0029] Rp, CpRp, Cp: obtained through AC impedance spectroscopy or dynamic operating condition fitting.

[0030] The formula is as follows:

[0031]

[0032] Wherein, Vterminal is the battery terminal voltage, I is the charge and discharge current, and Vp is the polarization voltage.

[0033] Determine all temperature compensation amounts of the device to be charged by using the load temperature data;

[0034] In some embodiments, the temperature compensation amount can be determined in this way:

[0035] The internal resistance of the battery changes with temperature and is corrected by the Arrhenius equation: in, R 25 is the internal resistance at 25℃, α is the material characteristic coefficient, and T is the current temperature (K).

[0036] Open circuit voltage temperature compensation or other temperature compensation modes can also be used: fitting the temperature dependence according to experimental data Voc Impact:

[0037] Voc(SOC,T)=Voc(SOC,25℃)+β(T−25), β is the temperature coefficient (mV / ℃);

[0038] The battery equivalent model is compensated by all temperature compensation amounts to obtain a compensated battery equivalent model;

[0039] Substitute the temperature compensated parameters into the equivalent model:

[0040] ;

[0041] The dynamic equation is updated as: ; where Cp(T) may also vary with temperature.

[0042] Estimating the remaining battery capacity of the device to be charged by using the compensated battery equivalent model;

[0043] In some embodiments: the battery remaining capacity (SOC) estimation uses an extended Kalman filter (EKF) algorithm:

[0044] Equation of state: ; Q is the rated capacity of the battery, Δ t is the sampling time.

[0045] Observation equation: ;

[0046] EKF iteration process:

[0047] Prediction: Update the SOC prediction value based on the current integral.

[0048] Correction: Use the difference between the terminal voltage measurement and the model prediction to adjust the SOC estimate via the Kalman gain.

[0049] The charging stage value of the device to be charged is determined according to the remaining capacity of the battery and a preset regulating factor.

[0050] In some embodiments, load temperature data of the device to be charged is obtained through a temperature sensor.

[0051] In some embodiments, adjusting the charging current of the output interface according to the load margin prediction value and the charging level of the device to be charged specifically includes:

[0052] When the predicted value of the carrying margin is greater than zero, adjusting the charging current of the output interface according to the charging level of the device to be charged;

[0053] When the predicted value of the carrying margin is less than zero, the charging current of the output interface is cut off.

[0054] In a second aspect, the present application provides a control device for current distribution of a multi-output power adapter, comprising a control unit, wherein the control unit comprises:

[0055] An acquisition module, used to acquire load-temperature data of a power adapter;

[0056] A processing module, used to generate a load-temperature scatter plot according to the load-temperature data, fit the load-temperature scatter plot to obtain a load-temperature basis of the power adapter, and then determine the thermal balance entropy of the power adapter from the load-temperature basis;

[0057] The processing module is further used to perform margin prediction for each output interface based on the limit carrying capacity and incoming line current of the output interface and the thermal balance entropy of the power adapter to obtain a carrying margin prediction value corresponding to the output interface;

[0058] The processing module is further used to obtain the battery impact amount and load temperature data of the device to be charged, determine the charging stage value of the device to be charged according to the load temperature data and the battery impact amount, and then determine the charging stage of the device to be charged according to the charging stage value;

[0059] The regulating module is used to regulate the charging current of the output interface according to the predicted value of the carrying margin and the charging level of the device to be charged.

[0060] In a third aspect, the present application provides a computer device, comprising a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the computer device executes the above-mentioned control method for current distribution of a multi-output power adapter.

[0061] In a fourth aspect, the present application provides a computer-readable storage medium, in which instructions or codes are stored. When the instructions or codes are run on a computer, the computer implements the above-mentioned multi-output power adapter current distribution control method when executed.

[0062] The technical solution provided by the embodiments disclosed in this application has the following beneficial effects:

[0063] In a control method and device for current distribution of a multi-output power adapter provided by the present application, load-temperature data of the power adapter is obtained; a load-temperature scatter plot is generated according to the load-temperature data, and the load-temperature scatter plot is fitted to obtain the load-temperature base of the power adapter, and then the thermal balance entropy of the power adapter is determined by the load-temperature base; for each output interface, a margin prediction is performed based on the maximum load capacity and incoming line current of the output interface and the thermal balance entropy of the power adapter to obtain a load margin prediction value corresponding to the output interface; the battery influence amount and load temperature data of the device to be charged are obtained, the charging level value of the device to be charged is determined by the load temperature data and the battery influence amount, and then the charging level of the device to be charged is judged according to the charging level value; the charging current of the output interface is adjusted according to the load margin prediction value and the charging level of the device to be charged.

[0064] In the present application, firstly, the thermal balance entropy of the power adapter can be used to measure the correlation between the temperature and load of the power adapter, so as to help obtain a more accurate load margin prediction value. Then, by determining the output interface load margin prediction value, the power load of the output interface can be accurately measured, so as to avoid exceeding the capacity range of the power adapter output interface when charging the device, and the output interface can be more accurately adjusted to provide the most suitable charging current for the output interface. Secondly, by obtaining the battery impact amount of the device to be charged, the power adapter can dynamically adapt to the charging needs of different devices to be charged to provide the charging current most suitable for the device to be charged. Through the charging step value, the power adapter can be helped Provide the most optimized charging speed for the device to be charged, so as to keep the adapter running within a safe range, reduce the impact of overcharging or insufficient current on the battery life of the device, and prevent damage to the device to be charged and the power adapter. Finally, by dynamically adjusting the incoming current based on the load margin prediction value and the charging level of the device to be charged, the power adapter can flexibly adapt to the charging needs of different devices, ensure that the device to be charged is allocated a suitable charging current, and obtain the best charging effect. When the load margin prediction value is not enough to meet the load of the output interface, the power adapter avoids overload by adjusting the incoming current, so as to achieve the allocation of suitable charging current to different devices to be charged without overloading the power adapter. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0066] Figure 1 is an exemplary flow chart of a method for controlling current distribution of a multi-output power adapter according to some embodiments of the present application;

[0067] Figure 2 is an exemplary flow chart for determining a charging level value of a device to be charged according to some embodiments of the present application;

[0068] Figure 3 is a schematic diagram of exemplary hardware and / or software of a control unit according to some embodiments of the present application;

[0069] Figure 4 It is a structural schematic diagram of a computer device for implementing a control method for current distribution of a multi-output power adapter according to some embodiments of the present application. DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0071] The embodiment of the present application provides a control method and device for current distribution of a multi-output power adapter, the core of which is to obtain load-temperature data of the power adapter; generate a load-temperature scatter plot based on the load-temperature data, fit the load-temperature scatter plot to obtain the load-temperature base of the power adapter, and determine the thermal balance entropy of the power adapter from the load-temperature base; for each output interface, a margin prediction is performed based on the maximum load capacity and incoming line current of the output interface and the thermal balance entropy of the power adapter to obtain a load margin prediction value corresponding to the output interface; obtain the battery influence amount and load temperature data of the device to be charged, determine the charging level value of the device to be charged from the load temperature data and the battery influence amount, and then judge the charging level of the device to be charged based on the charging level value; adjust the charging current of the output interface based on the load margin prediction value and the charging level of the device to be charged, so as to achieve the allocation of appropriate charging current to different devices to be charged without overloading the power adapter.

[0072] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. Figure 1 , which is an exemplary flow chart of a method for controlling current distribution of a multi-output power adapter according to some embodiments of the present application. The method 100 for controlling current distribution of a multi-output power adapter mainly includes the following steps:

[0073] In step 101, load-temperature data of a power adapter is obtained.

[0074] It should be noted that, in the present application, the power adapter refers to a power adapter with multiple output interfaces, that is, a multi-channel power adapter, and the load-temperature data represents the corresponding data between the load and temperature of the power adapter in historical work. For example, in historical work, when the load of the power adapter is 100 watts, the corresponding power adapter temperature is 20 degrees Celsius. In specific implementation, the load-temperature data of the power adapter can be collected through the temperature sensor and load monitoring equipment in the power adapter.

[0075] In step 102, a load-temperature scatter plot is generated according to the load-temperature data, the load-temperature scatter plot is fitted to obtain a load-temperature base of the power adapter, and then the thermal balance entropy of the power adapter is determined by the load-temperature base.

[0076] In some embodiments, a load-temperature scatter plot is generated based on the load-temperature data. In specific implementation, first, all missing data in the load-temperature data can be detected. For each missing point in the load-temperature data, the average value of its adjacent data is filled to the missing point to obtain the complete load-temperature data. Then, based on the complete load-temperature data, a scatter plot is drawn with temperature as the horizontal axis and load as the vertical axis, i.e., a load-temperature scatter plot.

[0077] In some embodiments, the load-temperature scatter plot is fitted to obtain the load-temperature base of the power adapter. It should be noted that in the present application, the load-temperature base is a curve used to describe the relationship between the load and temperature of the power adapter, indicating the response of the power adapter temperature to the load change, and reflecting the expected behavior of the power adapter temperature as the load changes. In specific implementation, the load-temperature scatter plot can be fitted by polynomial interpolation method, and the load-temperature fitting curve can be obtained by fitting. The load-temperature curve is used as the load-temperature base of the power adapter. In actual implementation, regression analysis and exponential fitting can also be used for fitting to obtain the load-temperature base of the power adapter, which is not limited here.

[0078] In some embodiments, the thermal balance entropy of the power adapter is determined by the load-temperature basis. It should be noted that in the present application, the thermal balance entropy is a value used to measure the degree of correlation between the temperature and load of the power adapter. The thermal balance entropy is determined based on the degree of coupling between the incoming current of the power adapter and the temperature of the power adapter. When the thermal balance entropy is small, it indicates that the heat dissipation effect of the power adapter is poor, and more safety margins need to be reserved when adjusting the charging current of the power adapter. In specific implementation, all load data and corresponding temperature data in the load-temperature basis are obtained. For each load data, the ratio of the load data to the temperature data is normalized, and then the average value of all normalized results is used as the thermal balance entropy of the power adapter.

[0079] In step 103, for each output interface, margin prediction is performed based on the limit carrying capacity and incoming line current of the output interface and the thermal balance entropy of the power adapter to obtain a carrying margin prediction value corresponding to the output interface.

[0080] It should be noted that in the present application, the maximum carrying capacity indicates the rated power that the output interface of the power adapter can carry, and the incoming current indicates the current value flowing in the output interface of the power adapter. In the specific implementation, first, the rated power of each output interface of the power adapter can be obtained through the product manual of the power adapter or the manufacturer's website, and the rated power is used as the maximum carrying capacity of the corresponding output interface. Then, the current value at the output interface can be obtained through the current sensor as the incoming current corresponding to the output interface. Because each output interface of the power adapter is connected to a different charging device, the incoming current of each output interface is also different when it is working.

[0081] Preferably, in some embodiments, the margin prediction is performed based on the limit carrying capacity of the output interface, the incoming line current, and the thermal balance entropy of the power adapter, and obtaining the carrying margin prediction value corresponding to the output interface specifically includes:

[0082] Determine the carrying power corresponding to the output interface according to the incoming line current;

[0083] A margin prediction is performed based on the carrying power, the thermal balance entropy of the power adapter and the limit carrying capacity to obtain a carrying margin prediction value corresponding to the output interface.

[0084] It should be noted that the load margin prediction value in the present application is a prediction value of the power load margin of the power adapter output interface, and the power load margin is the margin between the power charging power at the next moment and the rated power of the output interface. In specific implementation, first, the load power corresponding to the output interface is determined according to the incoming current, and then the load power, the thermal balance entropy of the power adapter and the limit load capacity can be input into the neural network prediction model for prediction to obtain the load margin prediction value corresponding to the output interface, and the thermal balance entropy of the power adapter is input into the neural network prediction model. The thermal balance entropy of the power adapter can be used as the weight used in the middle layer of the neural network prediction model to help the model adjustment for iterative optimization, so as to obtain a more accurate load margin prediction value.

[0085] In the above embodiment, the carrying power corresponding to the output interface can be determined according to the incoming line current in the following manner, namely:

[0086] Obtaining a load voltage of the power adapter;

[0087] Preset power factor;

[0088] The carrying power corresponding to the output interface is determined by the power factor, the incoming line current and the load voltage of the power adapter.

[0089] It should be noted that the power factor is a parameter used to adjust the accuracy and value of the carrying power. It can be preset based on historical experience and experimental data. In specific implementation, first, the voltage of the power adapter when it is working, that is, the load voltage of the power adapter, can be obtained through the voltage sensor. Then, the incoming current corresponding to the output interface and the load voltage of the power adapter can be multiplied, and the product of the result and the power factor is used as the carrying power corresponding to the output interface. The carrying power represents the power of the load when the output interface is working.

[0090] It should be noted that different mobile devices usually have different charging requirements. Some devices may support higher charging currents, while others may require lower currents. By understanding the incoming current, maximum carrying capacity, and carrying power of each output interface, the appropriate charging current can be allocated according to the needs of the device to be charged to ensure compatibility and better optimize the charging experience. By determining the predicted value of the carrying margin of each output interface, the power load of each output interface can be accurately measured, and the capacity of the power adapter output interface can be avoided when charging the device. The output interface can also be more accurately adjusted to provide the most appropriate charging current for the output interface.

[0091] In step 104, the battery impact amount and load temperature data of the device to be charged are obtained, the charging stage value of the device to be charged is determined based on the load temperature data and the battery impact amount, and then the charging stage of the device to be charged is determined based on the charging stage value.

[0092] It should be noted that, in the present application, the battery impact quantity of the device to be charged includes: the battery voltage of the device to be charged, the charge and discharge current of the battery of the device to be charged, and the battery internal resistance of the device to be charged. The load temperature data represents the temperature data of the device to be charged when it is working. In specific implementation, the battery impact quantity of the device to be charged can be obtained through the product manual of the device to be charged or the manufacturer's website of the device to be charged. The charge and discharge current of the battery of the device to be charged can be the incoming current of the corresponding power adapter output interface when it is working, and the load temperature data of the device to be charged can be obtained through a temperature sensor.

[0093] Preferably, in some embodiments, reference Figure 2 As shown in FIG. 1 , this figure is an exemplary flow chart of determining the charging level value of the device to be charged in some embodiments of the present application. In this embodiment, determining the charging level value of the device to be charged can be implemented by the following steps:

[0094] First, in step 1041, a battery equivalent model of the device to be charged is constructed according to the battery impact amount;

[0095] Then, in step 1042, all temperature compensation amounts of the device to be charged are determined according to the load temperature data;

[0096] Next, in step 1043, the battery equivalent model is compensated by all temperature compensation amounts to obtain a compensated battery equivalent model;

[0097] Next, in step 1044, the remaining battery capacity of the device to be charged is estimated by using the compensated battery equivalent model;

[0098] Finally, in step 1045, the charging level of the device to be charged is determined according to the remaining battery capacity and a preset control factor.

[0099] It should be noted that in the present application, the charging stage value is an indicator used to measure the charging status of the device to be charged. Different charging stage values ​​can represent different stages of the battery of the device to be charged. The temperature compensation amount includes the temperature compensation amount of the internal resistance and the temperature compensation amount of the voltage. The preset control factor is an indicator used to adjust the accuracy and value of the charging stage value, which can be set according to historical experience.

[0100] In specific implementation, first, a battery equivalent circuit model can be used to model the characteristics of the battery as a complex system with components such as voltage, current and internal resistance. This can be a simplified circuit model, such as a resistance-electromotive force model, or other battery models. Then, the battery equivalent model is compensated by all temperature compensation quantities, which is to add the influence of temperature on internal resistance and voltage to the battery equivalent model, and then obtain a compensated battery equivalent model. Since the compensated battery equivalent model takes into account the influence of temperature, the model accuracy of the compensated battery equivalent model is higher, which is convenient for obtaining more accurate estimation results. Secondly, a state estimation algorithm, such as an extended Kalman filter or other filtering algorithms, can be used in combination with the compensated battery equivalent model for estimation, and the remaining battery capacity of the device to be charged can be obtained. Finally, the remaining battery capacity of the device to be charged can be divided by the effective battery capacity of the device to be charged, and the product of the result and the preset control factor is used as the charging stage value of the device to be charged, and then the charging stage value of each device to be charged can be obtained.

[0101] In some embodiments, the charging level of the device to be charged is determined according to the charging level value. In specific implementation, it should be noted that in the present application, the charging level of the device to be charged includes: a pre-charging stage, a fast charging stage, a full charging stage and a power-off stage. For example, when the charging value of the device to be charged is between 0 and 0.05, the charging level of the device to be charged is determined to be the pre-charging stage. After the power adapter is connected to the power supply and the device to be charged through the output interface, the power adapter charges the battery of the device to be charged with a 10% fast charging current, in order to protect the battery of the device to be charged. When the charging level value of the device to be charged is between 0.06 and 0.9, the charging level of the device to be charged is determined to be the fast charging stage, and the power adapter charges the battery of the device to be charged with a constant current. In this process, the power adapter uses a constant current to charge the battery of the device to be charged. As the battery is charging, the battery voltage increases slightly over time, and when the charging level value of the device to be charged rises to a predetermined value, it indicates that the fast charging process is over. At this time, the current decreases rapidly, and the charging process enters the full charging stage, that is, when the charging level value of the device to be charged is between 0.9 and 1, the charging level of the device to be charged is judged to be the full charging stage. In this stage, the charging current gradually decreases. When it drops below the predetermined value, the power adapter starts to charge with a weak current, and the battery enters a slow charging state. At the same time, due to the small charging current, full charging can effectively extend the service life of the battery. When the charging value of the device to be charged is 1, the charging level of the device to be charged is judged to be the power-off stage, indicating that the device to be charged is fully charged, and the power adapter cuts off the power supply of the output interface connected to the device to be charged, without affecting the use of other output interfaces.

[0102] In addition, it should be noted that by obtaining the battery impact of the device to be charged, the power adapter can dynamically adapt to the charging needs of different devices to be charged, which means that the charging current can be adjusted based on the battery impact of the device to be charged to provide the charging current that is most suitable for the device to be charged. Through the charging step value, the power adapter can provide the most optimized charging speed for the device to be charged, which is convenient for keeping the adapter operating within a safe range, reducing the impact of overcharging or insufficient current on the battery life of the device, and preventing damage to the device to be charged and the power adapter.

[0103] In step 105, the charging current of the output interface is adjusted according to the load margin prediction value and the charging level of the device to be charged.

[0104] In some embodiments, the charging current of the output interface is adjusted according to the load margin prediction value and the charging level of the device to be charged in the following manner, namely:

[0105] When the predicted value of the carrying margin is greater than zero, adjusting the charging current of the output interface according to the charging level of the device to be charged;

[0106] When the predicted value of the carrying margin is less than zero, the charging current of the output interface is cut off.

[0107] In specific implementation, for each output interface of the power adapter, when the load margin prediction value is greater than zero, it indicates that the current power adapter output interface has not reached an overload state or has not exceeded its maximum load capacity, and can also carry a higher charging current. In this case, the charging current corresponding to the output interface can be increased according to the charging level of the device to be charged to ensure that it meets the charging needs of different devices while preventing overload. When the load margin prediction value is less than zero, it indicates that the current power adapter output interface has reached an overload state or has exceeded its maximum load capacity. In this case, in order to prevent overload and ensure safety, you can choose to cut off the charging current corresponding to the output interface to avoid excessive loading of the power adapter.

[0108] It should be noted that by dynamically adjusting the incoming current according to the load margin prediction value and the charging level of the device to be charged, the power adapter can flexibly adapt to the charging needs of different devices. This provides an intelligent management method to ensure that the device to be charged is allocated a suitable charging current and obtains the best charging effect. When the load margin prediction value is not sufficient to meet the load of the output interface, the power adapter avoids overload by adjusting the incoming current, which makes it easier to ensure that the power adapter operates within its safe operating range and prevents excessive loading.

[0109] In the present application, firstly, the thermal balance entropy of the power adapter can be used to measure the correlation between the temperature and load of the power adapter, so as to help obtain a more accurate load margin prediction value. Then, by determining the output interface load margin prediction value, the power load of the output interface can be accurately measured, so as to avoid exceeding the capacity range of the power adapter output interface when charging the device, and the output interface can be more accurately adjusted to provide the most suitable charging current for the output interface. Secondly, by obtaining the battery impact amount of the device to be charged, the power adapter can dynamically adapt to the charging needs of different devices to be charged to provide the charging current most suitable for the device to be charged. Through the charging step value, the power adapter can be helped Provide the most optimized charging speed for the device to be charged, so as to keep the adapter running within a safe range, reduce the impact of overcharging or insufficient current on the battery life of the device, and prevent damage to the device to be charged and the power adapter. Finally, by dynamically adjusting the incoming current based on the load margin prediction value and the charging level of the device to be charged, the power adapter can flexibly adapt to the charging needs of different devices, ensure that the device to be charged is allocated a suitable charging current, and obtain the best charging effect. When the load margin prediction value is not enough to meet the load of the output interface, the power adapter avoids overload by adjusting the incoming current, so as to achieve the allocation of suitable charging current to different devices to be charged without overloading the power adapter.

[0110] In addition, in another aspect of the present application, in some embodiments, the present application provides a control device for current distribution of a multi-output power adapter, the device comprising a control unit, referring to Figure 3 , which is a schematic diagram of exemplary hardware and / or software of a control unit according to some embodiments of the present application, the control unit 300 includes: an acquisition module 301, a processing module 302 and an adjustment module 303, which are described as follows:

[0111] Acquisition module 301, in this application, acquisition module 301 is mainly used to acquire load-temperature data of the power adapter;

[0112] Processing module 302, in the present application, the processing module 302 is mainly used to generate a load-temperature scatter plot according to the load-temperature data, fit the load-temperature scatter plot to obtain the load-temperature base of the power adapter, and then determine the thermal balance entropy of the power adapter from the load-temperature base;

[0113] It should be noted that the processing module 302 in the present application is also used to perform margin prediction for each output interface through the limit carrying capacity and incoming line current of the output interface and the thermal balance entropy of the power adapter to obtain a carrying margin prediction value corresponding to the output interface;

[0114] In addition, the processing module 302 in the present application is also used to obtain the battery impact amount and load temperature data of the device to be charged, determine the charging level value of the device to be charged according to the load temperature data and the battery impact amount, and then determine the charging level of the device to be charged according to the charging level value;

[0115] The regulating module 303 in the present application is mainly used to regulate the charging current of the output interface according to the predicted value of the carrying margin and the charging level of the device to be charged.

[0116] The above describes in detail the examples of the control method and device for current distribution of a multi-output power adapter provided by the embodiments of the present application. It can be understood that in order to realize the above functions, the corresponding device includes a hardware structure and / or software module corresponding to each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present application.

[0117] In some embodiments, the present application also provides a computer device, which includes a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the computer device executes the above-mentioned multi-output power adapter current distribution control method.

[0118] In some embodiments, reference Figure 4 , the dotted line in the figure indicates that the unit or the module is optional, and the figure is a structural diagram of a computer device according to a method for controlling current distribution of a multi-output power adapter provided in an embodiment of the present application. The method for controlling current distribution of a multi-output power adapter in the above embodiment can be Figure 4 The computer device 400 shown in the figure is implemented, and the computer device 400 includes at least one processor 401, a memory 402 and at least one communication unit 405. The computer device 400 can be a terminal device, a server or a chip.

[0119] The processor 401 may be a general-purpose processor or a special-purpose processor. For example, the processor 401 may be a central processing unit (CPU), which may be used to control the computer device 400, execute software programs, and process data of the software programs. The computer device 400 may also include a communication unit 405 to implement signal input (reception) and output (transmission).

[0120] For example, the computer device 400 may be a chip, the communication unit 405 may be an input and / or output circuit of the chip, or the communication unit 405 may be a communication interface of the chip, and the chip may be a component of a terminal device, a network device, or other devices.

[0121] For another example, the computer device 400 may be a terminal device or a server, and the communication unit 405 may be a transceiver of the terminal device or the server, or the communication unit 405 may be a transceiver circuit of the terminal device or the server.

[0122] The computer device 400 may include one or more memories 402, on which a program 404 is stored. The program 404 can be executed by the processor 401 to generate instructions 403, so that the processor 401 performs the method described in the above method embodiment according to the instructions 403. Optionally, data (such as a target audit model) may also be stored in the memory 402. Optionally, the processor 401 may also read the data stored in the memory 402, which may be stored at the same storage address as the program 404, or may be stored at a different storage address from the program 404.

[0123] The processor 401 and the memory 402 may be provided separately or integrated together, for example, integrated on a system on chip (SOC) of the terminal device.

[0124] It should be understood that each step of the above method embodiment can be completed by a hardware-based logic circuit or software-based instructions in the processor 401. The processor 401 can be a central processing unit, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, such as discrete gates, transistor logic devices or discrete hardware components.

[0125] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0126] For example, in some embodiments, the present application also provides a computer-readable storage medium, in which instructions or codes are stored. When the instructions or codes are run on a computer, the computer implements the above-mentioned multi-output power adapter current distribution control method when executing.

[0127] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0128] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for controlling current distribution of a multi-output power adapter, characterized in that: The steps include: Get the load-temperature data of the power adapter; Generate a load-temperature scatter plot according to the load-temperature data, fit the load-temperature scatter plot to obtain a load-temperature basis of the power adapter, and then determine the thermal balance entropy of the power adapter from the load-temperature basis; For each output interface, margin prediction is performed based on the maximum load capacity and incoming line current of the output interface and the thermal balance entropy of the power adapter to obtain a load margin prediction value corresponding to the output interface; Acquire battery impact and load temperature data of the device to be charged, determine the charging stage value of the device to be charged based on the load temperature data and the battery impact, and then determine the charging stage of the device to be charged based on the charging stage value; Adjusting the charging current of the output interface according to the predicted value of the carrying margin and the charging level of the device to be charged; The margin prediction is performed based on the limit load capacity of the output interface, the incoming line current, and the thermal balance entropy of the power adapter to obtain the load margin prediction value corresponding to the output interface, specifically including: Determine the carrying power corresponding to the output interface according to the incoming line current; Perform margin prediction based on the carrying power, the thermal balance entropy of the power adapter and the limit carrying capacity to obtain a carrying margin prediction value corresponding to the output interface; Determining the carrying power corresponding to the output interface according to the incoming line current specifically includes: Obtaining a load voltage of the power adapter; Preset power factor; Determine the carrying power corresponding to the output interface according to the power factor, the incoming line current and the load voltage of the power adapter; Determining the charging stage value of the device to be charged based on the load temperature data and the battery impact amount specifically includes: Constructing a battery equivalent model of the device to be charged according to the battery impact amount; Determine all temperature compensation amounts of the device to be charged by using the load temperature data; The battery equivalent model is compensated by all temperature compensation amounts to obtain a compensated battery equivalent model; Estimating the remaining battery capacity of the device to be charged by using the compensated battery equivalent model; The charging stage value of the device to be charged is determined according to the remaining capacity of the battery and a preset regulating factor.

2. The method according to claim 1, characterized in that The load-temperature scatter diagram is fitted using a polynomial interpolation method.

3. The method according to claim 1, characterized in that The load temperature data of the device to be charged is obtained through the temperature sensor.

4. The method according to claim 1, characterized in that The step of adjusting the charging current of the output interface according to the load margin prediction value and the charging level of the device to be charged specifically includes: When the predicted value of the carrying margin is greater than zero, adjusting the charging current of the output interface according to the charging level of the device to be charged; When the predicted value of the carrying margin is less than zero, the charging current of the output interface is cut off.

5. A control device for current distribution of a multi-output power adapter, the control device for current distribution of a multi-output power adapter comprising a control unit, characterized in that: The control unit comprises: An acquisition module, used to acquire load-temperature data of a power adapter; A processing module, used to generate a load-temperature scatter plot according to the load-temperature data, fit the load-temperature scatter plot to obtain a load-temperature basis of the power adapter, and then determine the thermal balance entropy of the power adapter from the load-temperature basis; The processing module is further used to perform margin prediction for each output interface based on the limit carrying capacity and incoming line current of the output interface and the thermal balance entropy of the power adapter to obtain a carrying margin prediction value corresponding to the output interface; The processing module is further used to obtain the battery impact amount and load temperature data of the device to be charged, determine the charging stage value of the device to be charged according to the load temperature data and the battery impact amount, and then determine the charging stage of the device to be charged according to the charging stage value; An adjustment module, used for adjusting the charging current of the output interface according to the predicted value of the carrying margin and the charging level of the device to be charged; The margin prediction is performed based on the limit load capacity of the output interface, the incoming line current, and the thermal balance entropy of the power adapter to obtain the load margin prediction value corresponding to the output interface, specifically including: Determine the carrying power corresponding to the output interface according to the incoming line current; Perform margin prediction based on the carrying power, the thermal balance entropy of the power adapter and the limit carrying capacity to obtain a carrying margin prediction value corresponding to the output interface; Determining the carrying power corresponding to the output interface according to the incoming line current specifically includes: Obtaining a load voltage of the power adapter; Preset power factor; Determine the carrying power corresponding to the output interface according to the power factor, the incoming line current and the load voltage of the power adapter; Determining the charging stage value of the device to be charged based on the load temperature data and the battery impact amount specifically includes: Constructing a battery equivalent model of the device to be charged according to the battery impact amount; Determine all temperature compensation amounts of the device to be charged by using the load temperature data; The battery equivalent model is compensated by all temperature compensation amounts to obtain a compensated battery equivalent model; Estimating the remaining battery capacity of the device to be charged by using the compensated battery equivalent model; The charging stage value of the device to be charged is determined according to the remaining capacity of the battery and a preset regulating factor.

6. A computer device, characterized in that: The computer device includes a memory and a processor, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the computer device executes the control method for current distribution of a multi-output power adapter according to any one of claims 1 to 4.

7. A computer-readable storage medium, wherein instructions or codes are stored in the computer-readable storage medium. When the instructions or codes are executed on a computer, the computer implements the method for controlling current distribution of a multi-output power adapter as claimed in any one of claims 1 to 4.

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