Mobile power supply and port power distribution system thereof

Abstract

The invention relates to the technical field of mobile power supplies, in particular to a mobile power supply and a port power distribution system thereof. The system comprises a data acquisition module and a power distribution module, the power distribution module is used for distributing the port power of the mobile power supply through a balance distribution sub-module when the mobile power supply is low in electric quantity and outputs power to at least two charging ports at the same time, and the optimized distribution power of each charging port is obtained; the balance distribution sub-module comprises a first distribution grandson module, a power regulation grandson module and an optimal distribution grandson module; and finally, in combination with the health interference coefficient, the battery influence coefficient, and the initial power and the second distribution power of each charging port in the mobile power supply, determining the optimal distribution power of the charging port. According to the invention, the power of the to-be-charged equipment of the charging port is adaptively adjusted, so that the mobile power supply can ensure reasonable power distribution of each to-be-charged equipment under the condition of low electric quantity.

Description

Technical Field

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

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

[0003] At present, the power distribution of multiple charging ports by mobile power supplies 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 distributing the power of different ports based on the recommended power provided by the charging protocol of the device to be charged may result in that after 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 needs of the devices, that is, it is difficult to adaptively adjust the power of the device to be charged according to the remaining power of the mobile power supply. Summary of the invention

[0004] In order to solve the current technical problem that it is difficult to adaptively adjust the power of the device 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 a port power distribution system thereof, and the technical solution adopted is as follows: In a first aspect, an embodiment of the present invention provides a port power distribution system for a mobile power source, the system comprising: A data acquisition module is used to obtain device information of the mobile power supply and battery information of the device to be charged; 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 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.

[0005] Furthermore, the device information of the mobile power supply includes: maximum total output power, maximum output port power of each charging port and charging state of the mobile power supply.

[0006] Furthermore, 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.

[0007] Furthermore, allocating power to different charging ports in a power allocation order to obtain a first allocated power includes: The power allocation order of different charging ports is determined according to the charge states of different charging ports and the proportion of the maximum output port power; power is allocated to the charging devices of different charging ports according to the power allocation order to obtain a first allocated power; wherein the size 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.

[0008] Further, performing secondary power distribution on the first distributed power of the charging port to obtain the second distributed power includes: Calculate the standard deviation of the SOC of the devices to be charged at each current charging port, and construct a Gaussian function with a mean of 0 using the reciprocal of the standard deviation as the standard deviation parameter; substitute the power allocation order corresponding to the devices to be charged as the horizontal coordinate into the constructed Gaussian distribution function 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.

[0009] Furthermore, 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.

[0010] Furthermore, the battery information of the device to be charged includes: the battery temperature and power value of the device to be charged.

[0011] Further, 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.

[0012] Furthermore, the combining of the health interference coefficient, the battery impact coefficient, the initial power of each charging port in the mobile power supply 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.

[0013] In a second aspect, a mobile power supply is provided, wherein 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 obtain device information of the mobile power supply and battery information of the device to be charged; 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 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.

[0014] In a third aspect, an embodiment of the present invention provides an electronic device, including a memory and a processor, wherein the memory stores executable code, and when the processor executes the executable code, various possible embodiments of the first aspect are implemented.

[0015] In a fourth aspect, an embodiment of the present invention provides a computer program product, which includes: a computer program code, which, when executed on a computer, enables the computer to execute the method in the first aspect or any possible implementation of the first aspect.

[0016] In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed in a computer, enables the computer to execute various possible implementations of the first aspect.

[0017] The embodiments of the present invention have at least the following beneficial effects: The present invention firstly obtains the device information of the mobile power supply and the battery information of each charging port of the mobile power supply and the device to be charged connected to the charging port through a data acquisition module, and then allocates power to each port according to the charging protocol of the device to be charged; while ensuring that each device to be charged has a certain amount of available power, a balanced allocation submodule is constructed to realize the availability balanced priority allocation process, so that the mobile power supply can ensure that each device to be charged will not be unavailable due to the inability to allocate sufficient charging power in the case of low power; then, according to the impact of the mobile power supply load and current impact during the device power adjustment process, the power caused by the availability balanced priority allocation realized by the balanced allocation submodule is analyzed. Adjust the healthy interference to the mobile power supply, determine the healthy interference coefficient, and reduce the negative impact of power allocation on the mobile power supply battery; according to the impact of charging efficiency and power adjustment on the battery of the device to be charged, analyze the impact of different devices on the device battery when the power allocation results of availability balance priority are allocated, determine the battery impact coefficient, and reduce the negative impact of power allocation on the battery of the device to be charged; finally, combine the health interference coefficient, battery impact coefficient and equipment usage frequency analysis results to determine the optimized allocation power of the device to be charged at each charging port, and realize adaptive adjustment of the power of the device to be charged, so that the mobile power supply can ensure reasonable power allocation to each device to be charged when the battery is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A system module of a port power distribution system of a mobile power supply provided by an embodiment of the present invention; Figure 2 A schematic diagram of a module of a balanced allocation submodule provided by an embodiment of the present invention; Figure 3 A schematic diagram of a Gaussian function curve provided by an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a commonly used Buck-Boost step-up / step-down DC-DC converter provided by an embodiment of the present invention; Figure 5 A schematic diagram of the structure of a computer device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation method, structure, characteristics and effects of the port power distribution system of the mobile power supply proposed by the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0021] In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0022] 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: "and / or" in the text is only a way to describe the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present invention, "multiple" refers to two or more than two.

[0023] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0024] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0025] The embodiments of the present invention are described below in conjunction with the accompanying drawings. Those skilled in the art will appreciate 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.

[0026] The embodiment of the present invention provides a specific implementation method of a port power distribution system of a mobile power source. The method is applicable to a scenario in which charging is performed through a mobile power source, in which the mobile power source includes a plurality of charging ports.

[0027] Mobile power supplies usually consist of the following key parts: Battery Cell: Usually lithium-ion battery or lithium polymer battery is used to provide electrical energy storage function.

[0028] Circuit board: includes circuits for charge control, discharge management, power distribution and safety protection.

[0029] Interface ports: These include input ports (such as USB-C or Micro-USB) and output ports (such as USB-A, USB-C, etc.) for charging and powering external devices.

[0030] Protection circuit: including overcharge protection, over-discharge protection, over-current protection and short-circuit protection to ensure the safety of equipment and users.

[0031] Display system: such as LED indicator light or LCD screen, used to display power and working status.

[0032] In the embodiment of the present invention, a processor and a memory are also deployed in the mobile power supply, and the memory stores an 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 in the embodiment of the present invention. The processor is used for data processing, and the chip type is FPGA.

[0033] When using a mobile power bank to charge a device, the mobile power bank will allocate the appropriate charging power to the device through a series of detection, communication and power adjustment steps. When the device to be charged is inserted into the mobile power port, the system will first detect the physical connection: usually determine whether there is a device connected through the pin level of the port, such as the positive power supply Vbus and ground GND of the USB; detect the charging protocol supported by the device, such as USB Battery Charging (BC1.2), USB PowerDelivery (USB PD), Qualcomm Quick Charge (QC) and other charging protocols, and read the device's battery capacity, maximum charging current, recommended charging voltage and other parameters; once the supported protocol is detected, the mobile power bank and the device will conduct a protocol handshake to negotiate specific charging parameters; after the negotiation is completed, the mobile power bank will set up a DC-DC conversion circuit to output the negotiated voltage and current. During the charging process, the charging needs of the device and environmental changes are continuously monitored. According to the charging status of the device, such as the transition from fast charging to trickle charging, the connection status of multiple devices, and other factors, the output power is adjusted.

[0034] The specific scheme of the mobile power supply and the port power distribution system thereof provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0035] See also Figure 1 , which shows a flow chart of the steps of a port power distribution system of a mobile power supply provided by an embodiment of the present invention, the method comprises the following steps: The data acquisition module 10 is used to acquire device information of the mobile power source and battery information of the device to be charged.

[0036] Each mobile power supply has a plurality of charging ports, wherein each charging port can be connected to a device to be charged.

[0037] When the device to be charged is plugged 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 the mobile power supply, so that the mobile power supply can optimize the 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.

[0038] The battery information of the device to be charged obtained includes: the charging protocol supported by the device to be charged, such as USB Power Delivery, Qualcomm Quick Charge, BC1.2, etc.; wherein the charging protocol includes the charging voltage and current range supported by the device to be charged; the battery information of the device to be charged also includes: the state of charge (State of Charge, SOC) of the battery of the current device to be charged, the battery temperature, the battery management system (Battery Monitoring and Management System, BMS) of the device to be charged, the charging interval and each charging amount information of the device to be charged in a fixed historical time period, and the charging amount information can also be understood as the power value. Among them, the state of charge is also the percentage of remaining power. In an embodiment of the present invention, the fixed historical time period can be set to the past month.

[0039] 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 charge state 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 acquired data.

[0040] The power distribution module 20 is used to distribute the port power of the mobile power supply through the balanced distribution submodule to obtain the optimized distributed power of 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.

[0041] First, set the initial power of each charging port of the mobile power supply according to the charging protocol of the device to be charged. .

[0042] When a device to be charged is connected to a mobile power supply, power is first allocated to a charging port of the mobile power supply according to the charging parameters provided by the device to be charged during the transmission of the charging protocol.

[0043] According to the charging protocol supported by the charging device, determine the maximum charging power and recommended charging voltage and current combination currently supported by the charging device.

[0044] According to the maximum output power that the current charging port of the mobile power supply can provide, adjust the charging voltage and current combination, and select a charging voltage and current combination close to the recommended one as the output voltage and current combination, provided that it does not exceed the maximum charging power of the device to be charged and the maximum output power that the charging port can provide. The power corresponding to the voltage and current of each charging port is used as the initial power of the corresponding charging port.

[0045] Furthermore, a charging power allocation strategy for a low SOC of a mobile power source is constructed, so that when the mobile power source is at low power and outputs power to at least two charging ports at the same time, the port power of the mobile power source is allocated through a balanced allocation submodule to obtain the optimized allocated power for each charging port. In the embodiment of the present invention, it is set that when the SOC of the mobile power source is reduced to 15% or less, it is a low power state. That is, when the state of charge of the mobile power source is reduced to 15% or less, and there are multiple charging ports outputting power, it is necessary to optimize the allocation and adjustment of the current charging process of the mobile power source.

[0046] The goal of adjusting the port power of the mobile power supply through the balanced distribution submodule is to ensure that all devices that need to be charged and connected to the mobile power supply have available power, and to ensure that devices with lower charging power can also ensure a certain operating time when the power resources of the mobile power supply are limited.

[0047] The charging power distribution can be analyzed through two-stage objectives: first, the charging power of different devices to be charged is distributed according to the SOC of the devices to be charged and the port output power of different charging ports to meet the main goal and achieve fair power supply distribution.

[0048] Under the power allocation 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 centralized adjustment of the multi-port power, it may have a negative impact on the battery of the device to be charged and the mobile power supply. In order to reduce the impact of charging power adjustment on the battery life of the mobile power supply and the device to be charged, the power allocation adjustment process needs to be optimized.

[0049] In the embodiment of the present invention, the power distribution of the mobile power port is realized by the balanced distribution submodule, please refer to Figure 2 , Figure 2 This is a module diagram of a balanced allocation submodule, which includes: a first allocation submodule, a power regulation submodule, and an optimized allocation submodule.

[0050] The balanced allocation submodule is used to realize the balanced priority allocation of availability. The purpose of the balanced priority allocation of availability 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 device to be charged itself, it is also necessary to analyze the relationship between the SOC and charging power between the devices to be charged. The greater the difference in SOC between the devices to be charged, the more the reallocated charging power should focus on the low SOC device to ensure the availability of the low SOC device when the mobile power supply is exhausted. In an embodiment of the present invention, a low SOC device is a device to be charged with a SOC lower than 15%.

[0051] When the mobile power bank is at low power, port power reallocation not only needs to consider the current SOC and port output power of the devices to be charged at different ports, but also should reduce the total output power to ensure the power output duration, so as to further improve the overall charging amount of the low SOC devices.

[0052] In some possible implementations, the specific implementation module of the balanced allocation submodule is: The first allocation module 21 is used to allocate power to different charging ports according to the power allocation order to obtain the 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 the second allocated power.

[0053] Firstly, the method for obtaining the optimized output power is as follows: according to the rate of change of the charge state 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; and the maximum total output power of the mobile power supply is adjusted by the power maintenance index to obtain the optimized output power.

[0054] 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 of the mobile power supply at the current acquisition time and the SOC value at the previous acquisition time, calculate the ratio of the current SOC value to the absolute value u' of the difference, and normalize the obtained ratio result so that the range of the ratio is normalized to (0,1), and record the normalized result value as T 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).

[0055] It should be noted that the larger the power maintenance index is, the longer the charging time that the current mobile power supply can maintain at the current total output power is, and the smaller the total power that needs to be reduced for redistribution is.

[0056] The maximum total output power of the mobile power source is adjusted by the power maintenance index to obtain the optimized output power.

[0057] The calculation formula for the optimized output power is: Indicates that Indicates the optimized output power of the mobile power supply after redistribution. Indicates the current maximum total output power of the mobile power bank; T is the power retention index.

[0058] In some embodiments, the step of allocating power to different charging ports according to the power allocation order to obtain the first allocated power includes: According to the state of charge of different charging ports and the proportion of the maximum output port power, the power allocation order of different charging ports is determined: the maximum SOC of the device to be charged is used as the denominator, and the current SOC of each device to be charged is used as the numerator to obtain the SOC standardized value of each device to be charged; the current maximum output port power is used as the denominator, and the port output power of each charging port is used as the numerator to obtain the power standardized value of each charging port; the power standardized value and the SOC standardized value are multiplied, and the product is normalized to obtain the power allocation order R; wherein each device to be charged has its own corresponding charging port. The power allocation order represents the power allocation order parameter of the device to be charged corresponding to the current charging port. The smaller the value of the power allocation order, the more it needs to be allocated a higher power. It should be noted that each device to be charged has its own corresponding SOC standardized value, and each charging port also has its own corresponding power standardized value.

[0059] In some embodiments, a second power allocation is performed on the first allocated power of the charging port to obtain a second allocated power, including: calculating the standard deviation of the SOC of the devices to be charged at each current charging port, constructing a Gaussian distribution function with the inverse of the standard deviation as the standard deviation parameter and a mean of 0; substituting 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; obtaining 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, recorded as the target ratio; allocating power to the devices to be charged at different ports in order of power allocation order from small to large, determining 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; obtaining the difference between the sum of the first allocated powers and the optimized output power, recorded as the target difference; taking the product of the target difference and the power allocation order R of each charging port as the target product; calculating 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.

[0060] More specifically: Calculate the standard deviation of the SOC of the device to be charged at each charging port ,by The reciprocal of is the standard deviation parameter, constructing a Gaussian function with a mean of 0; see Figure 3 , Figure 3 It is a schematic diagram of the Gaussian function curve. The power allocation order of different devices to be charged is substituted into the constructed Gaussian distribution function as the horizontal coordinate to obtain the corresponding vertical coordinate of each device to be charged, and 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 is obtained, which is recorded as the target ratio P. According to the power allocation order from small to large, the power of the devices to be charged at different ports is allocated, and the allocated output power of each device to be charged is determined. 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. The allocated output power is recorded as .

[0061] It should be noted that the purpose of constructing the Gaussian function is to allocate charging power according to the degree of difference 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 it is necessary to increase the output power of the devices to be charged in the high power allocation order to ensure that the power allocation can balance the availability of each device to be charged. The smaller the reciprocal of is, the higher the kurtosis of the constructed Gaussian distribution function is, and the greater the difference in charging power obtained by devices with different power allocation orders is.

[0062] In addition, the total output power of each charging port should be taken into account during the allocation process. 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 The maximum total output power will be exceeded. The power distribution order of each charging port After multiplication, the corresponding charging port's allocated output power The difference is calculated, and the result value is used as the power allocation result of the availability balance priority allocation, and the power allocation result is recorded as the second allocated power. For different charging ports, the second allocated power The calculation formula is: ; It should be noted that the present invention achieves that 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 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 port is retained as the second allocated power.

[0063] The power regulation module 22 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.

[0064] When charging power is allocated using availability balance priority allocation, it may affect the battery health of the mobile power supply and the device to be charged. First, analyze the interference to the battery health of the mobile power supply. When the power adjustment of some ports of the mobile power supply is large, when the power of the mobile power supply port changes, such as switching from low power to high power, or fluctuates greatly, an instantaneous current shock will occur. Excessive current shock will cause stress changes in the electrode material inside the battery, and there may be a risk of overheating, which will accelerate the degradation of the battery.

[0065] In addition, when the SOC of the mobile power supply is low, the mobile power supply battery voltage 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 a charging port increases and the power output of another charging port decreases, it may cause uneven distribution of battery voltage. This imbalance will cause some battery cells 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. The battery cells here are, for example, individual cells in multiple battery modules connected in series.

[0066] It should be noted that the power requirements of the charging equipment are different at different charging stages. To predict the health interference of different port output current and voltage on the mobile power supply during the availability balancing priority allocation process, it is necessary to analyze the impact of the output power changes 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 balancing of the battery pack, it is necessary to combine the output changes of each charging port connected to the same battery cell.

[0067] First, the health interference coefficient of the charging port is determined by analyzing the current, voltage and power changes of the charging port, and then the health interference of the mobile power supply caused by the power adjustment caused by the availability balance priority allocation is analyzed.

[0068] First, for each charging port, determine the corresponding reference power change interval. Specifically: calculate the absolute value of the derivative of each timing point on the power timing curve corresponding to each charging port, sort the absolute value of the derivative of each timing point from large to small, calculate the difference between adjacent derivative values ​​in the sequence, select the two derivatives with the largest difference, and use the signal end composed of the timing points corresponding to the derivative 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 the timing points are connected, the corresponding reference power change interval is one. When the timing points are not connected, the corresponding reference power change interval is multiple.

[0069] Furthermore, by analyzing the changes in current intensity and voltage intensity in the reference power change interval, the current intensity impact parameter and the voltage intensity impact parameter of the charging port are determined.

[0070] Calculate the derivative value of each time point on the current intensity time series curve, and further calculate the maximum value of the absolute value of the derivative of the current intensity signal in the reference power change interval and the product c1' of the current intensity range in the reference power change interval, and then use the time series length of the range calculation time series point as the limiting condition of the instantaneous nature of the instantaneous impact, and divide the product c1' by the result value of the time series length As the current intensity impact parameter of the reference power change interval.

[0071] The voltage impact parameters of the power change interval are obtained in the same way Specifically: calculate the derivative value of each time point on the voltage intensity time series curve, and further calculate the maximum value of the absolute value of the derivative of the voltage intensity signal within the reference power change interval and the product c2' of the voltage intensity range within the reference power change interval, and then use the time series length of the range calculation time series point as the limiting condition of the instantaneous nature of the instantaneous impact, and divide the product c2' by the result value of the time series length As the voltage intensity impact parameter of the reference power change interval.

[0072] The difference between the second allocated power and the initial power in each charging port of the same battery cell connected to the mobile power source is divided into two groups according to the positive and negative signs, and the product of the sum of the positive array and the sum of the negative array is calculated. If there is no data in one group, the sum of the group is 0, and the value is calculated by Perform inverse proportional normalization and eliminate the negative influence, and use the result value after inverse proportional normalization as , is the parameter affected by the internal load of the battery cell. According to the above analysis, The larger the value is, the more likely it is that the adjustment process of the second power distribution of each charging port corresponding to the current battery cell will cause excessive internal load of the battery and uneven distribution.

[0073] Furthermore, 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.

[0074] Health Interference Factor The calculation formula is: In the above formula, Indicates the number of reference power change intervals of the current port. Indicates the extreme value of power within the jth reference power variation interval; is the current intensity impact parameter of the jth reference power variation interval; is the voltage intensity impact parameter of the jth reference power variation interval. Evaluate the degree of impact of output current intensity and voltage caused by power change in the jth reference power change interval, and use As the denominator, the current impact caused by unit power adjustment is evaluated by represents the current impact within the jth reference power variation interval; it is combined with the parameter representing the internal load impact of the battery cell After combining, through represents the health interference coefficient.

[0075] After determining the health interference coefficient of the charging port through the current, voltage and power changes of the charging port, the battery impact coefficient of the device to be charged is determined by analyzing the battery information of the device to be charged corresponding to the charging port, so as to analyze the possible impact on the device battery caused by the power allocation results of different devices to be charged in the availability balance priority allocation.

[0076] For devices that need to be charged, when the charging power is higher than the power recommended by the current protocol, the device's battery monitoring and management system (BMS) may not be able to effectively control the temperature in a timely manner, resulting in heat accumulation inside the device that needs to be charged. The charging process of the device's battery is accompanied by a rise in temperature, which accelerates battery aging and reduces its charging efficiency and service life.

[0077] In addition, the actual change in power is also related to the charging efficiency of the device: when there is a quality problem with the connection line connected to the device to be charged, or when there is abnormal operation inside the device, the actual charging efficiency of the device may be reduced. At this time, the charging output power has a more serious impact on the heating of the device battery, that is, the output electrical energy is not fully converted into electrical energy of the device battery, and is usually expressed in the form of heat energy.

[0078] Therefore, the battery information of the device to be charged corresponding to the charging port is analyzed to determine the battery impact coefficient of the device to be charged. First, 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: Calculate the output power signal of each charging port within the most recent reference power change interval. Normalized value of output power corresponding to each timing point ; Calculate the power signal of the device to be charged corresponding to each charging port within the most recent reference power change interval. The power value corresponding to each timing point Normalized value of the derivative ; Calculate the device power loss coefficient at the i-th time point in the most recent reference power change interval during the charging process of each charging port .

[0079] Secondly, the battery impact coefficient of the device to be charged is determined by combining the battery temperature of the device to be charged, the device power loss coefficient and the power of the corresponding charging port: According to the above analysis, through Indicates the reference power variation interval The relationship between the rate of change of the power of the charging device at each timing point, and then Normalized value of the port output power Subtract the absolute value to represent the reference power change interval. The difference between the charging power and the charge change at each time point, The larger the value is, the greater the reference power variation interval is. The greater the degree of power loss of the device at each timing point, the greater the corresponding device power loss coefficient The bigger.

[0080] Calculate the device battery impact factor for devices that need to be charged : In the above formula, Indicates the number of timing points in the most recent reference power change interval on the power timing curve of the port corresponding to the current device to be charged. Indicates the device battery temperature difference between the ith time point and the previous time point in the reference power change interval, Indicates the port power difference between the i-th timing point and the previous timing point in the reference power change interval. Indicates the reference power variation interval The relationship between the output power change at each timing point and the device temperature change, The larger the value of , the higher the change in device battery temperature caused by the unit power change; in addition, considering the possible charging loss, Indicates the reference power variation interval The power loss and heat dissipation at each time point can further accurately indicate the impact of power changes on the battery health of the device.

[0081] The optimization allocation submodule 23 is used to determine the optimized allocation power of the charging port by combining the health interference coefficient, the battery influence coefficient, the initial power of each charging port in the mobile power supply and the second allocation power.

[0082] After analyzing the impact of power adjustment on mobile power sources and devices to be charged, adjustments are made based on the power allocation results of the availability balance priority allocation, that is, adjustments are made based on the second allocated power of the availability balance priority allocation. The stronger the negative impact of the power adjustment on the mobile power source and the device to be charged, the lower the optimized power adjustment amount.

[0083] Furthermore, based on the analysis of the power allocation results of availability balance priority through data such as device power and charging power, the power is further adjusted in combination with the usage frequency of different devices to determine the optimal allocated power of the charging port. The usage frequency information can be analyzed through the charging interval and charging amount information of the device to be charged: the shorter the charging interval of the device to be charged and the larger the charging amount each time, the higher the usage frequency of the device to be charged. Therefore, in the power allocation process, in order to ensure that the device to be charged that is frequently used under low SOC conditions of the mobile power supply can get as much power as possible, it is necessary to ensure that the charging power of the device to be charged is as large as possible.

[0084] Combine the health interference coefficient and battery impact coefficient to determine the power regulation value of the charging port. Specifically: Get the health interference coefficient for each charging port And the battery impact factor of the device that needs to be charged The product of .

[0085] Then, according to the power adjustment value, the initial power of each charging port in the mobile power supply and the second allocated power, the optimal allocated power of the charging port is determined: Calculate the average value of the ratio of each charging amount and charging interval of each charging port corresponding to the device to be charged, and normalize the average value of the ratio. The normalized value is recorded as ; Optimize power distribution The calculation formula is: ; in, allocating power to the second; is the power adjustment value; is the initial power.

[0086] The control system optimizes the power distribution according to the output of the data processing module: , controlling the power output of different charging ports of the mobile power bank. The control system manages power distribution, protocol identification, etc. through a microcontroller unit (MCU).

[0087] After obtaining the optimized allocated power for 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 battery voltage 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 allocated power. Figure 4 , Figure 4 The following is a schematic diagram of the commonly used Buck-Boost step-up / step-down DC-DC converter structure, where K is the switch element, L1 and L2 are coils, C1 and C2 are capacitors, and D is a diode. and They are voltage input and voltage output respectively.

[0088] An embodiment of the present invention provides a mobile power supply, the mobile power supply comprising a processor and a memory, the processor being configured to execute 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; 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 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.

[0089] Optionally, the transmission medium can be a wired link, such as but not limited to coaxial cable, optical fiber and digital subscriber line, or a wireless link, such as but not limited to Wireless Fidelity (WIFI), Bluetooth and mobile device network.

[0090] It should be noted that the device provided in the above embodiment is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the computer device can be divided into different functional modules to complete all or part of the functions described above.

[0091] Figure 5 is a schematic diagram of the structure of a computer device provided by an embodiment of the present invention. Figure 5 As 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, wherein when the processor 520 executes the computer program 530, the computer device can execute the port power distribution system of any mobile power source introduced above.

[0092] In addition, an embodiment of the present invention also protects a device, which may include a memory and a processor, wherein the memory stores an 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.

[0093] The embodiment of the present invention can divide the functional modules of the device according to the above method example. For example, each functional module can be corresponded, 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 schematic and is only a logical function division. There may be other division methods in actual implementation.

[0094] In the case of dividing each module according to each function, the device may also 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 referred to the functional description of the corresponding functional module, which will not be repeated here.

[0095] It should be understood that the device provided in the embodiment of the present invention is used to execute the port power distribution system of the mobile power source, and thus can achieve the same effect as the above-mentioned implementation method.

[0096] In the case of an integrated unit, the device may include a processing module and a storage module. When the device is applied to a device, the processing module may be used to control and manage the actions of the device. The storage module may be used to support the device to execute mutual program codes, etc. The processing module may be a processor or a controller, which may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of the present invention. The processor may also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc. The storage module may be a memory.

[0097] In addition, the device provided in the embodiment of the present invention may specifically be a chip, a component or a module, and the chip may include a connected processor and a memory; wherein 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 embodiment.

[0098] An embodiment of the present invention also provides a computer-readable storage medium, which stores a computer program code. When the computer program code runs on a computer, the computer executes the above-mentioned related method steps to implement the port power distribution system of the mobile power supply provided in the above embodiment.

[0099] The embodiment of the present invention further provides a computer program product. When the computer program product is run on a computer, the computer is enabled to execute the above-mentioned related steps to implement the port power distribution system of the mobile power supply provided in the above-mentioned embodiment.

[0100] Among them, the device, computer-readable storage medium, computer program product or chip provided in 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 repeated here. Through the description of the above implementation methods, technicians in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, 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 devices and methods can be implemented in other ways.

[0101] The device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. There may be other divisions in actual implementation. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0102] It should also be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0103] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0104] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0105] The above contents are only specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should 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; 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 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 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.

3. A port power distribution system for a mobile power source according to claim 2, 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.

4. The port power distribution system of a mobile power source according to claim 2, characterized in that: The step of allocating power to different charging ports in a power allocation order to obtain a first allocated power includes: The power allocation order of different charging ports is determined according to the charge states of different charging ports and the proportion of the maximum output port power; power is allocated to the charging devices of different charging ports according to the power allocation order to obtain a first allocated power; wherein the size 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.

5. A port power distribution system for a mobile power source according to claim 4, characterized in that: The performing secondary power distribution on the first distributed power of the charging port to obtain the second distributed power includes: Calculate the standard deviation of the SOC of the devices to be charged at each current charging port, and construct a Gaussian function with a mean of 0 using the reciprocal of the standard deviation as the standard deviation parameter; substitute the power allocation order corresponding to the devices to be charged as the horizontal coordinate into the constructed Gaussian distribution function 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.

6. The port power distribution system of a mobile power source according to claim 2, 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 changes in 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.

7. 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.

8. The port power distribution system of a mobile power source according to claim 7, 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.

9. 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.

10. 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 obtain device information of the mobile power supply and battery information of the device to be charged; 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 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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