Mobile power supply and its port power distribution system

Abstract

The present invention relates to the technical field of mobile power supplies, and particularly to a mobile power supply and its port power distribution system. The system includes: a data acquisition module and a power distribution module. Among them, the power distribution module is used to, when the mobile power supply is in a low power state and simultaneously supplies power to at least two charging ports, distribute the port power of the mobile power supply through a balanced distribution sub-module to obtain the optimized distribution power of each charging port; the balanced distribution sub-module includes: a first distribution grandchild module, a power adjustment grandchild module, and an optimized distribution grandchild module; finally, by combining the health interference coefficient, the battery impact coefficient, the initial power of each charging port in the mobile power supply, and the second distribution power, the optimized distribution power of the charging port is determined. The present invention realizes the adaptive adjustment of the power for the devices to be charged at the charging port, so that the mobile power supply can ensure reasonable power distribution for each device to be charged in the case of low power.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile power supplies, and particularly to a mobile power supply and its port power distribution system. Background Art

[0002] A mobile power supply is a portable energy storage device used to provide power for electronic devices. With the increase in the number of mobile devices and the progress of technology, a mobile power supply not only needs to have high-efficiency charging and discharging capabilities but also needs to be able to flexibly adapt to the needs of various devices. The power distribution system is an important part of the mobile power supply, and its purpose is to reasonably distribute limited electric energy among multiple output ports to ensure that each device can obtain the required power as much as possible and maximize the overall charging efficiency.

[0003] Currently, the power distribution of a mobile power supply to multiple charging ports is usually based on the recommended charging power provided by the charging protocol of the device to be charged at each charging port. However, when the remaining power of the mobile power supply is low, directly performing power distribution for different ports according to the recommended power provided by the charging protocol of the device to be charged may result in the situation that after the power of the mobile power supply is exhausted, the power of some devices is insufficient to support a certain available time, making it difficult to meet the charging and usage requirements of the devices, that is, it is difficult to adaptively adjust the power for the devices to be charged according to the remaining power of the mobile power supply. Summary of the Invention

[0004] In order to solve the technical problem that it is currently difficult to adaptively adjust the power for the devices to be charged according to the remaining power of the mobile power supply, the purpose of the present invention is to provide a mobile power supply and its port power distribution system, and the specific technical solutions adopted are as follows:

[0005] In a first aspect, an embodiment of the present invention provides a port power distribution system for a mobile power supply, and the system includes:

[0006] A data acquisition module for acquiring device information of the mobile power supply and battery information of the device to be charged;

[0007] A power distribution module for, when the mobile power supply is in a low-power state and simultaneously supplying power to at least two charging ports, distributing the port power of the mobile power supply through a balanced distribution sub-module to obtain an optimized distribution power for each charging port;

[0008] The balanced distribution sub-module includes:

[0009] A first distribution sub-module for distributing power to different charging ports according to the power distribution sequence to obtain a first distribution power; when the sum of the first distribution powers of all charging ports is greater than the optimized output power, performing secondary power distribution on the first distribution power of the charging ports to obtain a second distribution power;

[0010] The power adjustment sub-module is used to analyze the current, voltage and power changes of the charging port to determine the health interference coefficient of the charging port; analyze the battery information of the device to be charged corresponding to the charging port to determine the battery influence coefficient of the device to be charged.

[0011] The optimization allocation sub-module is used to combine the health interference coefficient, the battery influence coefficient, the initial power and the second allocation power of each charging port in the mobile power supply to determine the optimized allocation power of the charging port.

[0012] Further, the device information of the mobile power supply includes: the maximum total output power, the maximum output port power of each charging port, and the state of charge of the mobile power supply.

[0013] Further, the method for obtaining the optimized output power is as follows:

[0014] According to the change rate of the state of charge of the mobile power supply at the current power, determine the power maintenance index of the mobile power supply under the current power output; adjust the maximum total output power of the mobile power supply through the power maintenance index to obtain the optimized output power.

[0015] Further, the step of performing power allocation on different charging ports according to the power allocation order to obtain the first allocation power includes:

[0016] Determine the power allocation order of different charging ports according to the state of charge of different charging ports and the proportion of the maximum output port power; perform power allocation on the devices to be charged of different charging ports according to the power allocation order to obtain the first allocation power; among them, the magnitude of the first allocation power is adjusted based on the maximum charging power of the device to be charged corresponding to the charging port with the smallest power allocation order.

[0017] Further, the step of performing secondary power allocation on the first allocation power of the charging port to obtain the second allocation power includes:

[0018] Calculate the standard deviation of the state of charge (SOC) of the devices to be charged at each current charging port. Use the reciprocal of the standard deviation as the standard deviation parameter to construct a Gaussian function with a mean of 0. Substitute the power distribution order corresponding to the devices to be charged as the abscissa into the constructed Gaussian distribution function to obtain the ordinate corresponding to each device to be charged. Obtain the ratio of the ordinate corresponding to each device to be charged to the maximum ordinate corresponding to all devices to be charged, denoted as the target ratio. Perform power distribution on the devices to be charged at different ports in ascending order of the power distribution order. The allocated output power is the product of the target ratio and the maximum charging power of the corresponding device to be charged under the current charging protocol. Obtain the difference between the sum of the first allocated power and the optimized output power, denoted as the target difference. Use the product of the target difference and the power distribution order of each charging port as the target product. Calculate the difference between the allocated output power of the charging port and the corresponding target product as the second allocated power of the charging port.

[0019] Further, analyzing the current, voltage, and power changes of the charging port to determine the health interference coefficient of the charging port includes:

[0020] For each charging port, determine the corresponding reference power change range. By analyzing the changes in current intensity and voltage intensity in the reference power change range, determine the current intensity impact parameter and voltage intensity impact parameter of the charging port.

[0021] Combining the second allocated power of each charging port, the current intensity impact parameter, the voltage intensity impact parameter, and the power change in the reference power change range, determine the health interference coefficient of the charging port.

[0022] Further, the battery information of the device to be charged includes: the battery temperature and the power value of the device to be charged.

[0023] Further, analyzing the battery information of the device to be charged corresponding to the charging port to determine the battery impact coefficient of the device to be charged includes:

[0024] According to the output power of the charging port and the power value of the corresponding device to be charged, determine the device power loss coefficient of the device to be charged. Combining the battery temperature of the device to be charged, the device power loss coefficient, and the power of the corresponding charging port, determine the battery impact coefficient of the device to be charged.

[0025] Further, combining the health interference coefficient, the battery impact coefficient, the initial power and the second allocated power of each charging port in the mobile power supply to determine the optimized allocation power of the charging port includes:

[0026] Determine the power adjustment value of the charging port by combining the health interference coefficient and the battery impact coefficient; determine the optimized allocation power of the charging port according to the power adjustment value, the initial power of each charging port in the mobile power supply, and the second allocation power.

[0027] In a second aspect, a mobile power supply is provided. The mobile power supply includes a processor and a memory. The processor is configured to execute the following modules:

[0028] A data acquisition module, configured to acquire the device information of the mobile power supply and the battery information of the device to be charged;

[0029] A power allocation module, configured to, when the mobile power supply is in a low power state and outputs power to at least two charging ports simultaneously, allocate the port power of the mobile power supply through a balanced allocation sub-module to obtain the optimized allocation power of each charging port;

[0030] The balanced allocation sub-module includes:

[0031] A first allocation sub-module, configured to allocate power to different charging ports in the power allocation order to obtain the first allocation power; when the sum of the first allocation powers of all charging ports is greater than the optimized output power, perform secondary power allocation on the first allocation power of the charging ports to obtain the second allocation power;

[0032] A power adjustment sub-module, configured to analyze the current, voltage, and power changes of the charging port to determine the health interference coefficient of the charging port; analyze the battery information of the device to be charged corresponding to the charging port to determine the battery impact coefficient of the device to be charged;

[0033] An optimized allocation sub-module, configured to combine the health interference coefficient, the battery impact coefficient, the initial power of each charging port in the mobile power supply, and the second allocation power to determine the optimized allocation power of the charging port.

[0034] In a third aspect, an embodiment of the present invention provides an electronic device, including a memory and a processor. An executable code is stored in the memory. When the processor executes the executable code, the methods in all possible implementation embodiments of the first aspect are implemented.

[0035] In a fourth aspect, an embodiment of the present invention provides a computer program product, which includes: computer program code. When the computer program code runs on a computer, the computer is caused to execute the method in the first aspect or any possible implementation manner of the first aspect.

[0036] In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed in a computer, the computer is caused to execute the methods in all possible implementation embodiments of the first aspect.

[0037] The embodiments of the present invention have at least the following beneficial effects:

[0038] First, the present invention obtains the device information of the mobile power supply and the battery information of each charging port of the mobile power supply and the devices to be charged connected to the charging ports through the data acquisition module, and then allocates power to each port according to the charging protocol of the devices to be charged; under the condition of ensuring that each device to be charged has a certain amount of available power, a balanced distribution sub-module is constructed to realize the process of preferential distribution of availability balance, so that the mobile power supply can ensure that each device to be charged will not be in an unavailable state due to insufficient charging power allocation in the case of low power; then, according to the impact of the mobile power supply load and current impact caused by the device power adjustment process on the mobile power supply, analyze the health interference of the power adjustment caused by the preferential distribution of availability balance realized by the balanced distribution sub-module to the mobile power supply, determine the health interference coefficient, and reduce the negative impact of power distribution on the battery of the mobile power supply; according to the impact of charging efficiency and power adjustment on the batteries of the devices to be charged, analyze the impact of the device batteries when different devices to be charged have the power distribution results of preferential distribution of availability balance, determine the battery impact coefficient, and reduce the negative impact of power distribution on the batteries of the devices to be charged; finally, combine the health interference coefficient, the battery impact coefficient and the analysis results of the device usage frequency to determine the optimized distribution power of the devices to be charged at each charging port, realize the adaptive adjustment of the power of the devices to be charged, and enable the mobile power supply to ensure reasonable power distribution to each device to be charged in the case of low power. Description of the Drawings

[0039] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0040] Figure 1 It is the system module of the port power distribution system of the mobile power supply provided by an embodiment of the present invention;

[0041] Figure 2 It is the module schematic diagram of the balanced distribution sub-module provided by an embodiment of the present invention;

[0042] Figure 3 It is the schematic diagram of the Gaussian function curve provided by an embodiment of the present invention;

[0043] Figure 4 It is the schematic diagram of the structure of the commonly used Buck-Boost step-up and step-down DC-DC converter provided by an embodiment of the present invention;

[0044] Figure 5 The structural schematic diagram of a computer device provided by an embodiment of the present invention. Specific embodiments

[0045] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following combines the accompanying drawings and preferred embodiments to elaborate in detail on the specific embodiments, structures, features, and effects of the port power distribution system of the mobile power supply proposed according to the present invention.

[0046] In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0047] Among them, in the description of the embodiments of the present invention, unless otherwise specified, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present invention, "a plurality" means two or more than two.

[0048] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as implying or suggesting relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0050] The following describes the embodiments of the present invention with reference to the accompanying drawings. Those of ordinary skill in the art will know that with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of the present invention are also applicable to similar technical problems.

[0051] The embodiments of the present invention provide a specific implementation method for the port power distribution system of the mobile power supply. This method is applicable to the scenario of charging through the mobile power supply, and in this scenario, the mobile power supply includes multiple charging ports.

[0052] The mobile power supply generally consists of the following key parts:

[0053] Battery unit: Usually uses lithium-ion batteries or lithium polymer batteries to provide the function of electrical energy storage.

[0054] Circuit board: It includes circuits such as charge control, discharge management, power distribution, and safety protection.

[0055] Interface ports: It includes input ports (such as USB-C or Micro-USB) and output ports (such as USB-A, USB-C, etc.), which are used for charging and powering external devices.

[0056] Protection circuit: It includes overcharge protection, over-discharge protection, over-current protection, and short-circuit protection to ensure the safety of the device and the user.

[0057] Display system: Such as LED indicators or LCD screens, which are used to display the battery level and working status.

[0058] In the embodiments of the present invention, a processor and a memory are also deployed in the mobile power supply. The memory stores executable program code, and the processor is used to call and execute the executable program code to execute the port power distribution system of the mobile power supply provided by the embodiments of the present invention. The processor is used for data processing, and the chip type is FPGA.

[0059] When using the mobile power supply to charge a device, the mobile power supply will allocate a suitable charging power to the device through a series of steps of detection, communication, and power regulation. When the device to be charged is inserted into the mobile power supply port, the system will first detect the physical connection: usually, it judges whether there is a device connected by the pin level of the port. The pin levels of the port are such as the power supply positive pole Vbus and the ground wire GND of USB; it detects the charging protocols supported by the device, such as USB Battery Charging (BC1.2), USB Power Delivery (USB PD), Qualcomm Quick Charge (QC), etc. charging protocols, and reads parameters such as the battery capacity, maximum charging current, and recommended charging voltage of the device; once a supported protocol is detected, a protocol handshake will be performed between the mobile power supply and the device to negotiate specific charging parameters; after the negotiation is completed, the mobile power supply will set the DC-DC conversion circuit to output the negotiated voltage and current. During the charging process, it continuously monitors the charging requirements of the device and environmental changes, and adjusts the output power according to the charging status of the device, such as factors such as the transition from fast charging to trickle charging and the connection of multiple devices.

[0060] The following specifically describes the specific solutions of the mobile power supply and its port power distribution system provided by the present invention in conjunction with the accompanying drawings.

[0061] Please refer to Figure 1 , which shows the step flowchart of the port power distribution system of the mobile power supply provided by an embodiment of the present invention. The method includes the following steps:

[0062] The data acquisition module 10 is used to acquire the device information of the mobile power supply and the battery information of the device to be charged.

[0063] Each mobile power supply has multiple charging ports, where each charging port can be connected to a device to be charged.

[0064] When the device to be charged is inserted into the charging port of the mobile power supply, a connection is first established: the mobile power supply sends a handshake signal, and the device to be charged transmits the battery information of the device to be charged to the mobile power supply so that the mobile power supply can perform optimized charging control and power distribution based on this information. The battery information transmitted by the device to be charged to the mobile power supply is obtained through the data acquisition module.

[0065] The obtained battery information of the device to be charged includes: the charging protocols supported by the device to be charged, such as USB Power Delivery, Qualcomm Quick Charge, BC1.2, etc.; among them, the charging protocol includes the charging voltage and current ranges supported by the device to be charged; the battery information of the device to be charged also includes: the state of charge (SOC) of the battery of the current device to be charged, the battery temperature, through the battery management system (Battery Monitoring and Management System, BMS) of the device to be charged, the charging interval and the charging amount information for each charging in a fixed historical time period of the device to be charged. The charging amount information can also be understood as the power value. Among them, the state of charge is also the percentage of the remaining power. In the embodiment of the present invention, the fixed historical time period can be set to the past month.

[0066] At the same time, the device information of the mobile power supply is obtained in real time, including: the maximum total output power, the maximum output port power of each charging port, the state of charge of the mobile power supply, and the real-time output power of each charging port, and is saved in the form of a signal; the horizontal axis of the signal is the acquisition time, and the vertical axis is the collected data.

[0067] The power distribution module 20 is used to, when the mobile power supply is in a low power state and outputs power to at least two charging ports at the same time, distribute the port power of the mobile power supply through the balance distribution sub-module to obtain the optimized distribution power of each charging port.

[0068] First, the initial power of each charging port of the mobile power supply is set through the charging protocol of the device to be charged. .

[0069] When the device to be charged is connected to the mobile power supply, power distribution is first performed through the charging parameters provided by the device to be charged during the transmission of the charging protocol for a certain charging port of the mobile power supply.

[0070] According to the charging protocol supported by the device to be charged, determine the maximum charging power currently supported by the device to be charged and the recommended charging voltage and current combination.

[0071] Adjust the charging voltage and current combination according to the maximum output power that the current charging port of the mobile power supply can provide. On the premise of not exceeding the maximum charging power of the device to be charged and the maximum output power that the charging port can provide, select a charging voltage and current combination close to the recommended one as the output voltage and current combination. Take the power corresponding to the voltage and current of each charging port as the initial power of the corresponding charging port.

[0072] Furthermore, construct a charging power distribution strategy for the low SOC of the mobile power supply, so that when the mobile power supply is in a low power state and simultaneously outputs power to at least two charging ports, the port power of the mobile power supply is distributed by the balance distribution sub-module to obtain the optimized distribution power of each charging port. In the embodiment of the present invention, it is set that when the SOC of the mobile power supply is reduced to 15% or less, it is in a low power state. That is, when the state of charge of the mobile power supply is reduced to 15% or less and there are multiple charging ports outputting power, it is necessary to optimize the distribution and adjustment of the current charging process of the mobile power supply.

[0073] The goal of adjusting the port power of the mobile power supply by the balance distribution sub-module is to make the devices to be charged connected to the mobile power supply all have available power, and ensure that the devices with lower charging power can also ensure a certain running time under the limited power resources of the mobile power supply.

[0074] The charging power distribution can be analyzed through two-stage goals: First, combine the SOC and port output power distribution of the devices to be charged at different charging ports to distribute the charging power of different devices to be charged, meet the main goal, and achieve fair power supply distribution.

[0075] Under the power distribution that meets the primary goal, the charging power is different from the recommended power supply power of the device to be charged, and if there is a large-scale concentrated adjustment of the multi-port power, it may have a negative impact on the batteries of the device to be charged and the mobile power supply. In order to reduce the impact of the charging power adjustment on the battery life of the mobile power supply battery and the device to be charged battery, it is necessary to optimize the power distribution adjustment process.

[0076] In the embodiment of the present invention, the distribution of the port power of the mobile power supply is realized through the balance distribution sub-module. Please refer to Figure 2 , Figure 2 which is a schematic diagram of the balance distribution sub-module. The balance distribution sub-module includes: the first distribution sub-module, the power adjustment sub-module, and the optimized distribution sub-module.

[0077] The balance distribution sub-module is used to implement availability balance priority distribution. The purpose of availability balance priority distribution is to ensure that each device to be charged has a certain amount of available power when the mobile power supply has a low SOC. In addition to the SOC data of the devices to be charged themselves, it is also necessary to analyze the relationship between the SOC and charging power among the devices to be charged. When the SOC difference among the devices to be charged is larger, the reallocated charging power should focus more on the low-SOC devices to ensure the availability of the low-SOC devices when the mobile power supply runs out of power. In the embodiments of the present invention, the low-SOC device is a device to be charged with an SOC lower than 15%.

[0078] And when the mobile power supply is in a low-power state, in addition to considering the current SOC and port output power of the devices to be charged at different ports, the port power reallocation should also reduce the total output power to ensure the power output duration, so as to further increase the overall charging amount of the low-SOC devices.

[0079] In some possible implementation manners, the specific implementation module of the balance distribution sub-module is:

[0080] The first distribution sub-module 21 is used to distribute power to different charging ports according to the power distribution order to obtain the first distribution power; when the sum of the first distribution powers of all charging ports is greater than the optimized output power, perform secondary power distribution on the first distribution powers of the charging ports to obtain the second distribution power.

[0081] First, determine the method for obtaining the optimized output power: According to the change rate of the state of charge of the mobile power supply at the current power, determine the power maintenance index of the mobile power supply at the current power output; adjust the maximum total output power of the mobile power supply through the power maintenance index to obtain the optimized output power.

[0082] In some embodiments, the method for obtaining the power maintenance index is to predict the duration of the mobile power supply at the current power output, obtain the absolute value u' of the difference between the SOC value at the current acquisition moment of the mobile power supply and the SOC value at the previous acquisition moment, calculate the ratio of the current SOC value to the absolute value u', and perform normalization processing on the obtained ratio result so that the range of the ratio is normalized to (0,1), and record the normalized result value as T, which is used as the power maintenance index of the mobile power supply at the current power output. In some embodiments, the method for predicting the duration of the mobile power supply at the current power output is to use the ratio of the power and the current power as the duration, where the unit of power is watt-hour (Wh) and the unit of power is watt (W).

[0083] It should be noted that the larger the power maintenance index, the longer the charging time that the current mobile power supply can still maintain at the current total output power, and the smaller the total power that needs to be reduced for reallocation.

[0084] Adjust the maximum total output power of the mobile power supply through the power maintenance index to obtain the optimized output power.

[0085] Then the calculation formula for the optimized output power is: denotes, where denotes the optimized output power of the mobile power supply after redistribution, denotes the current maximum total output power of the mobile power supply; T is the power maintenance index.

[0086] In some embodiments, the step of performing power distribution on different charging ports according to the power distribution order to obtain the first distribution power includes:

[0087] Determine the power distribution order of different charging ports according to the state of charge of different charging ports and the proportion of the maximum output port power: use the largest SOC in the devices to be charged as the denominator, and the current SOC of each device to be charged as the numerator to obtain the SOC normalization value of each device to be charged; use the current maximum output port power as the denominator, and the port output power of each charging port as the numerator to obtain the power normalization value of each charging port; multiply the power normalization value and the SOC normalization value, and perform range normalization on the product to obtain the power distribution order R; where each device to be charged has its corresponding charging port. This power distribution order represents the power distribution order parameter of the device to be charged corresponding to the current charging port. The smaller the value of the power distribution order, the more power needs to be allocated to it. It should be noted that each device to be charged has its own corresponding SOC normalization value, and each charging port also has its own corresponding power normalization value.

[0088] In some embodiments, perform secondary power distribution on the first distribution power of the charging port to obtain the second distribution power, including: calculate the standard deviation of the SOC of the devices to be charged of the current charging ports, construct a Gaussian distribution function with the reciprocal of the standard deviation as the standard deviation parameter and the mean value of 0; substitute the power distribution order corresponding to the device to be charged as the abscissa into the constructed Gaussian distribution function to obtain the corresponding ordinate of each device to be charged; obtain the ratio of the corresponding ordinate of each device to be charged to the maximum ordinate corresponding to all devices to be charged, denoted as the target ratio; perform power distribution on the devices to be charged of different ports in ascending order of the power distribution order to determine the allocated output power of each device to be charged, and the allocated output power is the product of the target ratio and the maximum charging power of the corresponding device to be charged under the current charging protocol; obtain the difference between the sum of the first distribution power and the optimized output power, denoted as the target difference; use the product of the target difference and the power distribution order R of each charging port as the target product; calculate the difference between the allocated output power of the charging port and the corresponding target product as the second distribution power of the charging port.

[0089] More specifically: calculate the standard deviation of the SOC of the devices to be charged at each current charging port , and use the reciprocal of as the standard deviation parameter to construct a Gaussian function with a mean of 0; please refer to Figure 3 . Figure 3 is a schematic diagram of the Gaussian function curve. Substitute the power distribution order of different devices to be charged as the abscissa into the constructed Gaussian distribution function to obtain the corresponding ordinate for each device to be charged, and obtain the ratio of the corresponding ordinate of each device to be charged to the maximum ordinate corresponding to all devices to be charged, denoted as the target ratio P. Perform power distribution on the devices to be charged at different ports in ascending order of the power distribution order, determine the allocated output power of each device to be charged, and the allocated output power is the product of the target ratio P and the maximum charging power of the corresponding device to be charged under the current charging protocol, and the allocated output power is denoted as .

[0090] It should be noted that the purpose of constructing the Gaussian function is to distribute the charging power according to the difference degree between the current SOCs of the devices to be charged. The greater the difference between the current SOCs of the devices to be charged, the more necessary it is to increase the output power of the devices to be charged with a higher power distribution order to ensure that the power distribution can balance the availability of each device to be charged. The smaller the reciprocal of

[0091] , the higher the kurtosis of the constructed Gaussian distribution function, and the greater the difference in the charging power allocated to devices with different power distribution orders. should not be greater than the optimized output power ; if the sum of the output powers of each port in the allocation result is greater than the optimized output power , then multiply the value exceeding the maximum total output power by the power distribution order of each charging port respectively, and then subtract it from the allocated output power of the corresponding charging port. Take the obtained result value as the power distribution result of the availability balance priority allocation, and denote this power distribution result as the second allocated power. For different charging ports, the second allocated power is calculated by the formula:

[0092] ;

[0093] It should be noted that what the present invention realizes is that when the sum of the first allocated powers of all charging ports is greater than the optimized output power, the first allocated power of the charging ports is subjected to secondary power allocation to obtain the second allocated power. It can be understood that when the sum of the first allocated powers of all charging ports is less than or equal to the optimized output power, the first allocated power of the charging ports is retained as the second allocated power.

[0094] The power adjustment sub-module 22 is configured to analyze the current, voltage and power changes of the charging port to determine the health interference coefficient of the charging port; analyze the battery information of the device to be charged corresponding to the charging port to determine the battery influence coefficient of the device to be charged.

[0095] When allocating the charging power using the availability balance priority allocation, it may affect the battery health of the mobile power supply and the device to be charged. First, analyze the battery health interference of the mobile power supply. When the power of some ports of the mobile power supply is adjusted greatly, when the power of the mobile power supply port changes, such as switching from low power to high power, or fluctuating greatly, an instantaneous current impact will be generated. An excessive current impact will cause stress changes in the electrode materials inside the battery, and at the same time, there may be a risk of overheating, accelerating the deterioration of the battery.

[0096] In addition, when the SOC of the mobile power supply is low, the battery voltage of the mobile power supply decreases accordingly, and a boost converter will be used to maintain the output power of the mobile power supply. At this time, the battery load of the mobile power supply is usually large. At this time, when the power output of one charging port increases and the power output of another charging port decreases, it may cause uneven voltage distribution of the battery. This imbalance will cause some battery cells of the battery to be overloaded, affecting the balance of the battery pack, and may cause some battery cells to be overcharged or over-discharged, thereby increasing the speed of battery aging. Here, the battery cells are, for example, individual cells in a plurality of serially connected battery modules.

[0097] It should be noted that the power requirements of the device to be charged are different at different charging stages. To predict the health interference of the mobile power supply caused by the output current and voltage of different ports during the availability balance priority allocation process, it is necessary to analyze the impact of the output power change of the charging port on the output current and power supply during the previous charging process. It should be noted that the battery cells connected to different charging ports may be different. Therefore, when analyzing the load balance of the battery pack, it is necessary to combine the output changes of the charging ports connected to the same battery cell.

[0098] First, determine the health interference coefficient of the charging port by analyzing the current, voltage and power changes of the charging port, so as to analyze the health interference of the mobile power supply caused by the power adjustment resulting from the availability balance priority allocation.

[0099] First, for each charging port, determine the corresponding reference power change interval. Specifically: calculate the absolute value of the derivative of each time series point on the power time series curve corresponding to each charging port, sort the absolute values of the derivatives of each time series point in descending order, calculate the difference between adjacent derivative values in the sequence, select the two largest derivatives, and use the signal ends corresponding to the time series points whose derivatives are greater than or equal to the larger value of the two derivatives as the reference power change interval. There may be one or more reference power change intervals. When all time series points are connected, the corresponding reference power change interval is one. When the time series points are not connected, the corresponding reference power change intervals are multiple.

[0100] Further, by analyzing the changes in current intensity and voltage intensity in the reference power change interval, determine the current intensity impact parameter and voltage intensity impact parameter of the charging port.

[0101] Calculate the derivative value of each time series point on the current intensity time series curve, and further calculate the product c1’ of the maximum value of the absolute value of the derivative of the current intensity signal in the reference power change interval and the range of the current intensity in the reference power change interval. Then, use the range to calculate the time series length of the time series point as the limiting condition for the instantaneousness of the instantaneous impact, and take the result of dividing the product c1’ by the time series length As the current intensity impact parameter of the reference power change interval.

[0102] Obtain the voltage impact parameter of the power change interval in the same way Specifically: calculate the derivative value of each time series point on the voltage intensity time series curve, and further calculate the product c2’ of the maximum value of the absolute value of the derivative of the voltage intensity signal in the reference power change interval and the range of the voltage intensity in the reference power change interval. Then, use the range to calculate the time series length of the time series point as the limiting condition for the instantaneousness of the instantaneous impact, and take the result of dividing the product c2’ by the time series length As the voltage intensity impact parameter of the reference power change interval.

[0103] Divide the difference between the second allocated power and the initial power of each charging port of the same battery cell connected to the mobile power supply into two groups according to the positive and negative signs, calculate the product of the sum of the positive group and the sum of the negative group. If there is no data in a certain group, the sum value of that group is 0, and through Perform inverse proportional normalization processing and eliminate the influence of negative numbers, and use the result value after inverse proportional normalization as , The parameter affected by the internal load of the battery cell. According to the above analysis, The larger the value of, the easier it is for the adjustment process of the second allocated power of each charging port corresponding to the current battery cell to cause excessive internal load and uneven distribution of the battery.

[0104] Further, a health interference coefficient of the charging port is determined in combination with the second allocated power of each charging port, the current intensity impact parameter, the voltage intensity impact parameter, and the power change within the reference power change range.

[0105] Health interference coefficient The calculation formula is as follows:

[0106]

[0107] In the above formula, represents the number of reference power change ranges of the current port, represents the power extreme difference within the j-th reference power change range; is the current intensity impact parameter for the j-th reference power change range; is the voltage intensity impact parameter for the j-th reference power change range. By evaluating the degree of impact on the output current intensity and voltage caused by the power change within the j-th reference power change range, and using as the denominator to evaluate the degree of current impact caused by unit power adjustment, and by representing the current impact in the j-th reference power change range; combining it with the parameter representing the internal load impact of the battery cell, and then by representing the health interference coefficient.

[0108] After determining the health interference coefficient of the charging port based on the current, voltage, and power changes of the charging port, the battery impact coefficient of the device to be charged corresponding to the charging port is determined by analyzing the battery information of the device to be charged, so as to analyze the possible impact on the device battery caused by the power distribution result of the availability balance priority distribution for different devices to be charged.

[0109] For a device to be charged, when the charging power is higher than the power recommended by the current protocol, the battery management system (BMS) of the device may not be able to control the temperature in a timely and effective manner, resulting in heat accumulation inside the device to be charged. During the charging process of the device battery, the temperature rises, causing the battery to age faster and reducing its charging efficiency and service life.

[0110] In addition, the actual power change situation is also related to the charging efficiency of the device: when there are quality problems with the connection line connected to the device to be charged, or there are abnormal component operations inside the device, the actual charging efficiency of the device may be reduced. At this time, the impact of the charging output power on the device battery heating is more serious, that is, the output electrical energy is not all converted into the electrical energy of the device battery, and it is usually represented in the form of heat energy.

[0111] Therefore, to analyze the battery information of the device to be charged corresponding to the charging port and determine the battery impact coefficient of the device to be charged, first, according to the output power of the charging port and the power value of the corresponding device to be charged, determine the device power loss coefficient of the device to be charged:

[0112] Calculate the normalization value of the output power corresponding to the th time point within the most recent reference power change interval of the output power signal of each charging port ;

[0113] Calculate the normalization value of the derivative of the power value corresponding to the th time point within the most recent reference power change interval of the power signal of the device to be charged corresponding to each charging port ; ;

[0114] Calculate the device power loss coefficient at the th time point within the most recent reference power change interval during the charging process of each charging port

[0115] Secondly, combining the battery temperature of the device to be charged, the device power loss coefficient, and the power of the corresponding charging port, determine the battery impact coefficient of the device to be charged:

[0116] According to the above analysis, through representing the relationship between the power change rate of the device to be charged at the th time point of the reference power change interval, and then subtracting from the normalization value of the port output power and taking the absolute value, representing the dissimilarity between the charging power and the power change at the th time point of the reference power change interval. The larger the value of , the greater the degree of power loss of the device at the th time point of the reference power change interval, and then the corresponding device power loss coefficient is larger.

[0117] Calculate the device battery impact coefficient of the device to be charged :

[0118]

[0119] In the above formula, represents the number of time points in the most recent reference power change interval on the power time series curve of the corresponding port of the current device to be charged, represents the temperature difference of the device battery between the It represents the power difference between the i-th time point and the previous time point in the reference power change interval. By It represents the relationship between the output power change and the device temperature change at the -th time point in the reference power change interval. The larger the value of , the higher the device battery temperature change caused by unit power change; in addition, considering the possible charging loss situation, by It represents the situation where the electrical energy loss becomes heat at the -th time point in the reference power change interval, which further accurately represents the impact of power change on the device battery health.

[0120] The optimization allocation sub-module 23 is used to determine the optimized allocation power of the charging port by combining the health interference coefficient, the battery impact coefficient, the initial power and the second allocation power of each charging port in the mobile power supply.

[0121] After analyzing the impact of power adjustment on the mobile power supply and the device to be charged, adjustments are made on the basis of the power allocation result of the availability balance priority allocation, that is, on the basis of the second allocation power of the availability balance priority allocation. The stronger the negative impact of the power adjustment on the mobile power supply and the device to be charged, the lower the optimized power adjustment amount.

[0122] Furthermore, on the basis of analyzing the power allocation result of the availability balance priority allocation through data such as the device power and the charging power, the power is further adjusted in combination with the usage frequency of different devices to determine the optimized allocation power of the charging port. The usage frequency information can be analyzed through the charging interval and the amount of each charge of the device to be charged: the shorter the charging interval and the larger the amount of each charge of the device to be charged, the higher the usage frequency of the device to be charged. Then, in the power allocation process, in order to ensure that the device to be charged that is frequently used under the low SOC condition of the mobile power supply can obtain as much power as possible, it is necessary to ensure that the charging power of the device to be charged is relatively large.

[0123] Combining the health interference coefficient and the battery impact coefficient, determine the power adjustment value of the charging port. Specifically:

[0124] Obtain the product of the health interference coefficient of each charging port and the battery impact coefficient of the device to be charged as the power adjustment value .

[0125] Then, according to the power adjustment value, the initial power and the second allocation power of each charging port in the mobile power supply, determine the optimized allocation power of the charging port:

[0126] Calculate the mean value of the ratio of the amount of each charge and the charging interval for the devices to be charged corresponding to each charging port, and normalize the mean value of the ratio. Denote the normalized value as ;

[0127] Optimize the power distribution The calculation formula is:

[0128] ;

[0129] Among them, is the second allocated power; is the power adjustment value; is the initial power.

[0130] The control system controls the power output of different charging ports of the mobile power supply according to the optimized power distribution output by the data processing module . Among them, the control system manages power distribution, protocol identification, etc. through a microcontroller (Microcontroller Unit, MCU).

[0131] After obtaining the optimized power distribution of each charging port, the MCU controls the DC-DC conversion module of the mobile power supply to adjust the output voltage and current of each charging port: The DC-DC converter usually converts the voltage of the battery into multiple standard voltages, such as 5V, 9V, 12V, etc. The MCU sends instructions to the DC-DC conversion module to adjust the output voltage and current of each charging port so that the port output power reaches the optimized power distribution. Please refer to Figure 4 , Figure 4 is a schematic diagram of the structure of a common Buck-Boost step-up / step-down DC-DC converter, where K is a switching element, L1 and L2 are coils, C1 and C2 are capacitors, D is a diode, and are the voltage input and voltage output respectively.

[0132] An embodiment of the present invention provides a mobile power supply, which includes a processor and a memory. The processor is used to execute the following modules:

[0133] A data acquisition module, which is used to acquire the device information of the mobile power supply and the battery information of the device to be charged;

[0134] A power distribution module, which is used to, when the mobile power supply is in a low power state and supplies power to at least two charging ports simultaneously, distribute the port power of the mobile power supply through a balanced distribution sub-module to obtain the optimized power distribution of each charging port;

[0135] The balanced distribution sub-module includes:

[0136] The first distribution sub-module is used to perform power distribution on different charging ports according to the power distribution order to obtain the first distributed power; when the sum of the first distributed powers of all charging ports is greater than the optimized output power, perform secondary power distribution on the first distributed powers of the charging ports to obtain the second distributed power;

[0137] The power adjustment sub-module is used to analyze the current, voltage and power changes of the charging port to determine the health interference coefficient of the charging port; analyze the battery information of the device to be charged corresponding to the charging port to determine the battery impact coefficient of the device to be charged;

[0138] The optimized distribution sub-module is used to combine the health interference coefficient, the battery impact coefficient, the initial power of each charging port in the mobile power supply and the second distributed power to determine the optimized distributed power of the charging port.

[0139] Optionally, the transmission medium can be a wired link, such as but not limited to, coaxial cable, optical fiber, digital subscriber line, etc., or a wireless link, such as but not limited to, Wireless Fidelity (WIFI), Bluetooth, mobile device network, etc.

[0140] It should be noted that: for the device provided in the above embodiments, only the above-mentioned division of each functional module is used for illustration. In actual applications, the above functions can be allocated by different functional modules according to needs, that is, the internal structure of the computer device is divided into different functional modules to complete all or part of the functions described above.

[0141] Figure 5 It is a schematic structural diagram of a computer device provided by an embodiment of the present invention. Exemplarily, as Figure 5 shown, the computer device 500 includes: a memory 510, a processor 520, and a computer program 530 stored in the memory 510 and running on the processor 520. When the processor 520 executes the computer program 530, the computer device can execute any port power distribution system of the mobile power supply described above.

[0142] In addition, an embodiment of the present invention also protects a device, which may include a memory and a processor. Among them, the memory stores executable program code, and the processor is used to call and execute the executable program code to execute the port power distribution system of the mobile power supply provided by the embodiment of the present invention.

[0143] In the embodiments of the present invention, the device can be divided into functional modules according to the above method examples. For example, each functional module can be corresponding, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware. It should be noted that the division of modules in this embodiment is illustrative, only a logical function division, and there can be other division methods in actual implementation.

[0144] In the case of dividing each module according to each function, the device can further include a signal uploading module, a determining module, an adjusting module, etc. It should be noted that all relevant contents of each step involved in the above method embodiment can be cited in the function description of the corresponding functional module, and will not be elaborated here.

[0145] It should be understood that the device provided in the embodiments of the present invention is used to execute the above port power distribution system of the mobile power supply, so the same effect as the above implementation method can be achieved.

[0146] In the case of adopting an integrated unit, the device can include a processing module and a storage module. Among them, when the device is applied to a device, the processing module can be used to control and manage the actions of the device. The storage module can be used to support the device to execute mutual program codes, etc. Among them, the processing module can be a processor or a controller, which can implement or execute various exemplary logic blocks, modules and circuits described in combination with the disclosure of the present invention. The processor can also be a combination that realizes computing functions, such as including a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc. The storage module can be a memory.

[0147] In addition, the device provided in the embodiments of the present invention can specifically be a chip, a component or a module. The chip can include a connected processor and a memory; among them, the memory is used to store instructions, and when the processor calls and executes the instructions, the chip can execute the port power distribution system of the mobile power supply provided in the above embodiments.

[0148] The embodiments of the present invention also provide a computer-readable storage medium, in which computer program codes are stored. When the computer program codes run on a computer, the computer is enabled to execute the above relevant method steps to implement the port power distribution system of the mobile power supply provided in the above embodiments.

[0149] The embodiments of the present invention also provide a computer program product. When the computer program product runs on a computer, the computer is enabled to execute the above relevant steps to implement the port power distribution system of the mobile power supply provided in the above embodiments.

[0150] Among them, the device, computer-readable storage medium, computer program product or chip provided by the embodiments of the present invention are all used to execute the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods provided above, and will not be elaborated here. Through the description of the above embodiments, those skilled in the art can understand that for the convenience and simplicity of description, only the above division of each functional module is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In the embodiments provided by the present invention, it should be understood that the disclosed device and method can be implemented in other ways.

[0151] The device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical, mechanical or other form.

[0152] It should also be noted that in this article, the terms "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or terminal device including the said element.

[0153] It should be noted that: the above sequence of the embodiments of the present invention is only for description and does not represent the superiority or inferiority of the embodiments. The processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0154] Each embodiment in this specification is described in a progressive manner. The same or similar parts between each embodiment can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

[0155] The above content is only a specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A port power distribution system for a mobile power source, characterized in that: The system includes the following modules: A data acquisition module is used to obtain device information of the mobile power supply and battery information of the device to be charged; The device information of the mobile power supply includes: the maximum total output power, the maximum output port power of each charging port and the charging state of the mobile power supply; A power distribution module, used to distribute the port power of the mobile power supply through a balanced distribution submodule to obtain an optimized distribution power for each charging port when the mobile power supply is low in power and outputs power to at least two charging ports at the same time; The balanced allocation submodule comprises: The first allocation module is used to allocate power to different charging ports according to the power allocation order to obtain a first allocated power; when the sum of the first allocated powers of all charging ports is greater than the optimized output power, the first allocated powers of the charging ports are secondary allocated to obtain a second allocated power; The method for obtaining the first allocated power is as follows: determining the power allocation order of different charging ports according to the charge states of different charging ports and the proportion of the maximum output port power; allocating power to the charging devices of different charging ports according to the power allocation order to obtain the first allocated power; wherein the magnitude of the first allocated power is adjusted based on the maximum charging power of the charging device corresponding to the charging port with the smallest power allocation order; The method for obtaining the second allocated power is as follows: calculate the standard deviation of the SOC of the devices to be charged at each current charging port, use the inverse of the standard deviation as the standard deviation parameter, and construct a Gaussian function with a mean of 0; bring the power allocation order corresponding to the devices to be charged into the constructed Gaussian distribution function as the horizontal coordinate to obtain the vertical coordinate corresponding to each device to be charged; obtain the ratio of the vertical coordinate corresponding to each device to be charged to the maximum vertical coordinate corresponding to all devices to be charged, and record it as the target ratio; allocate power to the devices to be charged at different ports in order from small to large according to the power allocation order, and allocate output power as the product of the target ratio and the maximum charging power of the corresponding device to be charged under the current charging protocol; obtain the difference between the sum of the super-first allocated power and the optimized output power, and record it as the target difference; take the product of the target difference and the power allocation order of each charging port as the target product; calculate the difference between the allocated output power of the charging port and the corresponding target product as the second allocated power of the charging port; The power regulation module is used to analyze the current, voltage and power changes of the charging port to determine the health interference coefficient of the charging port; analyze the battery information of the device to be charged corresponding to the charging port to determine the battery impact coefficient of the device to be charged; The optimization allocation submodule is used to determine the optimized allocation power of the charging port by combining the health interference coefficient, the battery impact coefficient, the initial power of each charging port in the mobile power supply and the second allocation power.

2. A port power distribution system for a mobile power source according to claim 1, characterized in that: The method for obtaining the optimized output power is: According to the change rate of the state of charge of the mobile power supply at the current power, the power maintenance index of the mobile power supply at the current power output is determined; the maximum total output power of the mobile power supply is adjusted by the power maintenance index to obtain the optimized output power.

3. The port power distribution system of a mobile power source according to claim 1, characterized in that: The analyzing the current, voltage and power changes of the charging port to determine the health interference coefficient of the charging port includes: For each charging port, determine a corresponding reference power variation interval; determine a current intensity impact parameter and a voltage intensity impact parameter of the charging port by analyzing the variation of current intensity and voltage intensity in the reference power variation interval; The health interference coefficient of each charging port is determined by combining the second allocated power of each charging port, the current intensity impact parameter, the voltage intensity impact parameter, and the power change in the reference power change interval.

4. The port power distribution system of a mobile power source according to claim 1, characterized in that: The battery information of the device to be charged includes: the battery temperature and power value of the device to be charged.

5. A port power distribution system for a mobile power source according to claim 4, characterized in that: The analyzing the battery information of the device to be charged corresponding to the charging port to determine the battery influence coefficient of the device to be charged includes: The device power loss coefficient of the device to be charged is determined based on the output power of the charging port and the power value of the corresponding device to be charged; the battery impact coefficient of the device to be charged is determined in combination with the battery temperature of the device to be charged, the device power loss coefficient and the power of the corresponding charging port.

6. The port power distribution system of a mobile power source according to claim 1, characterized in that: The step of combining the health interference coefficient, the battery impact coefficient, the initial power of each charging port in the mobile power source, and the second allocated power to determine the optimized allocated power of the charging port includes: The power regulation value of the charging port is determined in combination with the health interference coefficient and the battery influence coefficient; the optimized allocated power of the charging port is determined according to the power regulation value, the initial power of each charging port in the mobile power supply, and the second allocated power.

7. A mobile power source, characterized in that: The mobile power supply includes a processor and a memory, and the processor is used to execute the following modules: A data acquisition module is used to acquire device information of the mobile power supply and battery information of the device to be charged; the device information of the mobile power supply includes: maximum total output power, maximum output port power of each charging port and charge state of the mobile power supply; A power distribution module, used to distribute the port power of the mobile power supply through a balanced distribution submodule to obtain an optimized distribution power for each charging port when the mobile power supply is low in power and outputs power to at least two charging ports at the same time; The balanced allocation submodule comprises: The first allocation module is used to allocate power to different charging ports according to the power allocation order to obtain a first allocated power; when the sum of the first allocated powers of all charging ports is greater than the optimized output power, the first allocated powers of the charging ports are secondary allocated to obtain a second allocated power; The method for obtaining the first allocated power is as follows: determining the power allocation order of different charging ports according to the charge states of different charging ports and the proportion of the maximum output port power; allocating power to the charging devices of different charging ports according to the power allocation order to obtain the first allocated power; wherein the magnitude of the first allocated power is adjusted based on the maximum charging power of the charging device corresponding to the charging port with the smallest power allocation order; The method for obtaining the second allocated power is as follows: calculate the standard deviation of the SOC of the devices to be charged at each current charging port, use the inverse of the standard deviation as the standard deviation parameter, and construct a Gaussian function with a mean of 0; bring the power allocation order corresponding to the devices to be charged into the constructed Gaussian distribution function as the horizontal coordinate to obtain the vertical coordinate corresponding to each device to be charged; obtain the ratio of the vertical coordinate corresponding to each device to be charged to the maximum vertical coordinate corresponding to all devices to be charged, and record it as the target ratio; allocate power to the devices to be charged at different ports in order from small to large according to the power allocation order, and allocate output power as the product of the target ratio and the maximum charging power of the corresponding device to be charged under the current charging protocol; obtain the difference between the sum of the super-first allocated power and the optimized output power, and record it as the target difference; take the product of the target difference and the power allocation order of each charging port as the target product; calculate the difference between the allocated output power of the charging port and the corresponding target product as the second allocated power of the charging port; The power regulation module is used to analyze the current, voltage and power changes of the charging port to determine the health interference coefficient of the charging port; analyze the battery information of the device to be charged corresponding to the charging port to determine the battery impact coefficient of the device to be charged; The optimization allocation submodule is used to determine the optimized allocation power of the charging port by combining the health interference coefficient, the battery impact coefficient, the initial power of each charging port in the mobile power supply and the second allocation power.

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