Power supply control method and system of mobile power supply

Abstract

The invention relates to the technical field of mobile power supplies, in particular to a power supply control method and system for a mobile power supply, and the method comprises the following steps: based on external equipment, analyzing instantaneous voltage, current and impedance changes when the mobile power supply is connected for the first time, carrying out the feature recognition to obtain load classification features, setting parameters to optimize the grading state of an output channel, and adjusting the output power. The temperature and abnormity of the battery cell group are monitored, and power supply is dynamically switched by combining state signals, so that safety control is realized. According to the invention, through a combined acquisition mechanism relying on multiple signals, the change process of external equipment during connection is accurately captured, instant discrimination and feature classification of multiple load types are realized, the residual capacity and the energy consumption state are used as dynamic regulation and control basis, state linkage and staged adaptive adjustment in the power supply process are promoted, and the power supply efficiency is improved. Temperature abnormal changes are classified and archived after being subjected to periodic comparison processing, an interrupt strategy is decided in an auxiliary mode, and the risk pre-control capacity and the load compatibility performance are effectively enhanced.

Description

Technical Field

[0001] This invention relates to the field of portable power bank technology, and in particular to a power supply control method and system for portable power banks. Background Technology

[0002] The field of portable power banks involves technologies related to providing external charging for various portable electronic devices such as smartphones, tablets, and portable speakers. This encompasses the structural design, energy conversion, charging and discharging management, and related power supply control of power banks. Traditional power supply control methods typically involve the power bank detecting the connection status, current demand, and interface signals of the external device. This is done using threshold logic or simple circuit switching to control the power output. Generally, monitoring voltage and current changes, interface plug-in / unplug status, or the external device's startup signal is used as the basis for power supply control, and then appropriate circuit switching methods are used to manage the power supply process.

[0003] Existing technologies use single-parameter judgment and simple on / off methods, which make it difficult to identify multi-dimensional signal characteristics in complex load connection processes. They lack energy consumption adjustment and risk screening based on the actual operating status of the equipment. The long-term reliance on static thresholds leads to untimely identification of abnormal states. When load demand fluctuates or battery temperature is abnormal for a short time, there are often problems with insufficient or delayed power supply response, which can easily cause power supply process to go out of control, damage to electrical equipment, and safety hazards to mobile power supplies. Summary of the Invention

[0004] To address the technical problems existing in the prior art, embodiments of the present invention provide a power supply control method and system for a mobile power bank. The technical solution is as follows: On the one hand, a power supply control method for a mobile power bank is provided, including the following steps: S1: Based on external devices, analyze the instantaneous voltage change when the power bank is first connected, determine the synchronization status of the initial current signal and impedance, monitor the voltage and current dynamics of the Type-C power supply interface during load connection, and combine the difference signals for feature recognition to obtain load classification features. S2: Based on the load classification characteristics, set instantaneous current change parameters, optimize the action of the adjustment components according to the voltage change rate, coordinate the resistance parameter input adjustment circuit, control the linkage sequence of the output channels through multi-channel signal switching, execute commands according to the combined signals, and obtain the graded status of the output channels; S3: Based on the graded status of the output channel, obtain the remaining battery capacity, collect power consumption changes, connect the remaining capacity and power consumption signals, adjust the output power range, and obtain power supply matching quantitative indicators. S4: Based on the power supply matching quantitative index, monitor the temperature of the mobile power cell group, read the maximum and minimum temperatures of each sampling period, identify the temperature change rate and jump characteristics, perform judgment and marking according to the protection limit, and obtain the power supply safety judgment mark.

[0005] On the other hand, the load classification features include load category code, dynamic feature identifier, and interface identification information; the output channel classification status includes channel level number, power supply switching identifier, and priority response information; the power supply matching quantification indicators include capacity allocation factor, power adjustment coefficient, and load adaptation parameters; and the power supply safety judgment identifier includes temperature warning mark, protection response level, and thermal runaway warning signal.

[0006] On the other hand, the specific steps for obtaining the load classification features are as follows: S101: Based on external devices, analyze the voltage change of the port when the mobile power bank is connected for the first time. By recording the voltage change trend at each time point, calculate the voltage fluctuation in each time slice, compare the voltage rise and fall between consecutive sampling points, determine the speed of voltage change in each stage at the beginning of the connection, filter the voltage variation characteristics in each stage, and obtain the stage voltage fluctuation parameters. S102: Based on the stage voltage fluctuation parameters, determine the correlation between current change and impedance change within the same time period, compare the trend of current change during sudden changes with the synchronicity of impedance fluctuation, screen the signal differences formed by the combination of different parameters, optimize the classification criteria of multiple signal types, and obtain load classification characteristics.

[0007] On the other hand, the specific steps for obtaining the hierarchical status of the output channel are as follows: S201: Based on the load classification characteristics, analyze the current changes of each load type during the startup phase. By monitoring the current fluctuations within a continuous time slice, compare the rate of change of the current curves in different phases, determine the sensitivity of the load to the current response in the initial startup phase, screen the instantaneous current change characteristics of each load type, and obtain the current response trend parameters. S202: Based on the current response trend parameters, compare the action time sequence of the regulating component in each response stage, analyze the voltage fluctuations generated before and after the action of the regulating component based on the voltage monitoring data, determine the feedback correspondence between the regulating component and the signal at the resistor input terminal, determine the regulating capability of the regulating component, and obtain the channel regulating capability quantification group. S203: Based on the channel adjustment capability quantization group, analyze the linkage relationship between control signal combinations in each channel, filter the control command types that trigger channel responses, determine the order of action of each control command in each channel, establish the corresponding state of channels and commands, and obtain the output channel hierarchical state.

[0008] On the other hand, the specific steps for obtaining the power supply matching quantification index are as follows: S301: Based on the graded status of the output channel, analyze the real-time power data of the corresponding power supply channel, determine the trend of battery remaining capacity change recorded by the power sensor at each sampling point, compare the synchronous fluctuation of battery data under different channel states, identify the impact of channel switching on battery state changes, and obtain the channel capacity fluctuation range. S302: Based on the remaining power data of each time period in the channel capacity fluctuation range, collect the discharge process monitored by the power consumption detection unit, compare the synchronization between the power consumption and the remaining battery energy within the time period, analyze the direction of change of power consumption trend and mark the rate of change, and obtain the discharge matching parameter set. S303: Based on the correspondence between the remaining energy and the power consumption trend in the discharge matching parameter group, analyze the matching degree between the current channel output state and the battery power supply capacity, screen the power range that meets the continuous output requirements, mark the output characteristics of each channel, and obtain the power supply matching quantitative index.

[0009] On the other hand, the specific steps for obtaining the power supply safety determination identifier are as follows: S401: Based on the power supply matching quantitative index, monitor the temperature performance of the battery cell group in each sampling cycle, analyze the temperature records of each sampling point, determine the changes in the temperature rise and fall phases, compare the trend of the difference between the maximum and minimum temperatures, identify the temperature fluctuation characteristics in each time period, and obtain the temperature rate distribution characteristics. S402: Analyze the temperature rate distribution characteristics in different time periods, determine the fluctuation rate corresponding to the temperature change section, identify the abnormal jump characteristics that occur in the temperature acquisition cycle, compare with the safety range of the protection limit, mark the data points with abnormal changes, and obtain the thermal risk warning factor. S403: Based on the thermal risk warning factor, filter the temperature risk parameters associated with the current power supply status, determine whether the collected temperature changes trigger the protection conditions, mark the operating status of the power supply circuit according to the judgment result, and obtain the power supply safety judgment mark.

[0010] On the other hand, the method also includes: S5: Based on the power supply safety judgment mark, combined with the output channel graded status adjustment power supply switch, the power supply matching quantitative index is linked to select the power range and output channel, the disconnection condition is judged according to the temperature monitoring information, and a shutdown command is issued to cut off the main power supply to obtain the power supply control status signal. The power supply control status signals include disconnect execution code, power conversion identifier, and channel status command.

[0011] On the other hand, the specific steps for obtaining the power supply control status signal are as follows: S501: Based on the power supply safety judgment identifier, analyze the channel level corresponding to the current output channel classification state, determine the switching conditions of the power supply switch state under each channel, compare the adjustment instructions of the safety judgment signal to the power supply switch, and adjust the switch of each output channel in sequence to obtain the channel switching instruction sequence. S502: Based on the channel switching instruction sequence and combined with the power supply matching quantification index, analyze the correspondence between the power difference range and the output channel, determine the switching order of the output channel in each power range, filter the output channel that currently meets the power allocation requirements, and combine the matched power range with the channel status to obtain the power allocation mapping group; S503: Based on the power distribution mapping group, determine whether the temperature monitoring signal triggers the disconnection condition, analyze the disconnection judgment parameters in the monitoring information, determine whether a shutdown command needs to be issued, record the shutdown action and main power supply disconnection status, and obtain the power supply control status signal.

[0012] On the other hand, the instantaneous voltage change refers to the change in voltage across the port over time when the external device is first connected to the power bank; the initial current signal refers to the current data detected in the first time slice at the initial stage of device connection; and the output power range refers to the range of electrical energy that the power bank is allowed to output after adjusting according to its remaining capacity and current load requirements.

[0013] On the other hand, a power supply control system for a mobile power bank is provided, which is applied to the power supply control method of the mobile power bank, including: The load identification module is based on external devices. It analyzes the instantaneous voltage change when the power bank is first connected, determines the synchronization status of the initial current signal and impedance change, monitors the voltage and current dynamics of the Type-C power interface during load connection, detects the current flow direction through the bidirectional output unit, combines the different signal types for feature identification, and obtains the load classification characteristics. Based on the load classification characteristics, the output regulation module sets instantaneous current change parameters, optimizes the response action of the regulation component according to the voltage change rate, coordinates the resistance parameter input regulation circuit, uses multi-channel signal switching to control the linkage sequence of the output channels, and executes control commands in sequence according to the combined signals to obtain the graded state of the output channels. Based on the graded status of the output channel, the energy matching module obtains the remaining battery capacity through the power sensor, calls the energy consumption detection unit to collect power consumption changes, connects the remaining capacity signal and the power consumption signal in real time, and adjusts the output power range according to the remaining capacity to obtain the power supply matching quantitative index. Based on the power supply matching quantitative index, the temperature control monitoring module monitors the temperature of the battery cell group inside the power bank, reads the maximum and minimum temperature in each sampling cycle, identifies the temperature change rate and jump characteristics, and performs judgment and marking according to the protection limit to obtain the power supply safety judgment mark. Based on the power supply safety judgment mark, the safety power supply module adjusts the power supply switch according to the graded status of the output channel, selects the power range and output channel by linking the power supply matching quantitative index, judges whether the disconnection condition is entered based on the temperature monitoring information, issues a shutdown command and cuts off the main power supply, and obtains the power supply control status signal.

[0014] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: By relying on a joint acquisition mechanism of multiple signals, the system accurately captures the changes during the connection of external devices, enabling real-time identification and feature classification of various load types. It matches real-time feedback in the output channel adjustment and energy distribution process, uses remaining capacity and energy consumption status as the basis for dynamic control, promotes state linkage and phased adaptive adjustment during the power supply process, and archives abnormal temperature changes after periodic comparison and processing to assist in decision-making on interruption strategies. This effectively enhances risk prevention and control capabilities and load compatibility performance, adapts to diverse application scenarios, and balances continuity and power supply safety. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a flowchart of the main steps of the present invention; Figure 2 This is a flowchart of steps S1 of the present invention; Figure 3 This is a flowchart of steps S2 of the present invention; Figure 4 This is a flowchart of steps S3 of the present invention; Figure 5 This is a flowchart of step S4 of the present invention; Figure 6 This is a flowchart of steps S5 of the present invention; Figure 7 This is a system block diagram of the present invention. Detailed Implementation

[0017] The technical solution of the present invention will now be described with reference to the accompanying drawings.

[0018] In embodiments of the present invention, words such as "exemplarily," "for example," etc., are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" in the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present the concept in a concrete manner. Furthermore, in embodiments of the present invention, the meaning expressed by "and / or" can be both, or either one.

[0019] In the embodiments of this invention, the terms "image" and "picture" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, they convey the same meaning. Similarly, the terms "of," "corresponding (relevant)," and "corresponding" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, they convey the same meaning.

[0020] In this embodiment of the invention, sometimes a subscript such as W1 may be written in a non-subscript form such as W1. When the difference is not emphasized, the meaning they express is the same.

[0021] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0022] This invention provides a power supply control method for a mobile power bank, such as... Figure 1 As shown, it includes the following steps: S1: Based on external devices, analyze the instantaneous voltage change when the power bank is first connected, determine the synchronization status of the initial current signal and impedance change, monitor the voltage and current dynamics of the Type-C power supply interface during load connection, detect the current flow direction through the bidirectional output unit, combine the different signal types for feature recognition, and obtain the load classification characteristics. S2: Based on load classification characteristics, instantaneous current change parameters are set, the response action of the adjustment component is optimized according to the voltage change rate, the resistance parameter input adjustment circuit is coordinated, the linkage sequence of the output channel is controlled by multi-channel signal switching, and the control commands are executed sequentially according to the combined signals to obtain the graded state of the output channel. S3: Based on the hierarchical status of the output channel, the remaining battery capacity is obtained through the power sensor, the power consumption detection unit is called to collect power consumption changes, the remaining capacity signal and the power consumption signal are connected in real time, and the output power range is adjusted according to the remaining capacity to obtain the power supply matching quantitative index. S4: Based on the power supply matching quantitative index, monitor the temperature of the internal battery cell group of the power bank, read the maximum and minimum temperature of each sampling cycle, identify the temperature change rate and jump characteristics, and perform judgment and marking according to the protection limit to obtain the power supply safety judgment mark. S5: Based on the power supply safety judgment mark, adjust the power supply switch according to the graded status of the output channel, select the power range and output channel by linking the power supply matching quantitative index, determine whether the disconnection condition is entered based on the temperature monitoring information, issue a shutdown command and cut off the main power supply, and obtain the power supply control status signal.

[0023] Load classification features include load category code, dynamic feature identifier, and interface identification information; output channel classification status includes channel level number, power supply switching identifier, and priority response information; power supply matching quantitative indicators include capacity allocation factor, power adjustment coefficient, and load adaptation parameters; power supply safety judgment identifiers include temperature warning mark, protection response level, and thermal runaway warning signal; and power supply control status signals include disconnect execution code, power conversion identifier, and channel status command.

[0024] In S1, external devices refer to various portable electronic devices that are connected to the power bank via a data cable or interface and are powered by the power bank. Instantaneous voltage change refers to the rapid change in voltage across the port over time when the external device is first connected to the power bank. This parameter is used to capture the electrical characteristics at the moment of connection, reflecting the load type; the initial current signal refers to the current data detected by the current acquisition circuit in the first time slice at the initial stage of device connection, used to determine the load startup characteristics; impedance change refers to the dynamic change of the equivalent impedance at both ends of the port during device connection, used to help identify different types of loads (such as resistive, inductive, and capacitive); synchronization status refers to the simultaneous monitoring of the initial current signal and impedance change and the corresponding data, used to determine whether the current change is directly caused by impedance characteristics; load connection period refers to the short time interval from when the external device is plugged into the power bank until it stabilizes, which is the key window for detecting parameter changes; bidirectional output unit refers to the circuit module that can realize forward and reverse current detection, generally composed of H-bridge or bidirectional MOSFET, used to monitor changes in load direction and power supply direction; current flow direction refers to whether the detected current flows from the power bank to the load or from the external power supply back to the power bank, affecting the power supply strategy selection; feature recognition refers to classifying the load type based on the various signals (voltage, current, impedance, etc.) collected above (such as identifying it as a resistive, inductive, or capacitive load).

[0025] In S2, the instantaneous current change parameter refers to the rate and degree of change of current during load startup or initial operation, which is the core adjustment basis for determining the power supply output response; the voltage change rate refers to the amount of change of port voltage per unit time, used to assist in judging the dynamic response of the load and guide the adjustment strategy of the adjustment component; the response action of the adjustment component refers to the action command of the circuit elements (such as MOSFETs, DC-DC chips, etc.) in the power module responsible for adjusting the output current, voltage, etc.; the adjustment circuit refers to the circuit system in the entire power bank used to realize the automatic adjustment of power supply output, including functions such as feedback, amplification, and protection; multi-channel signal switching refers to the electronic switch or multiplexer selecting a specific power supply channel according to the strategy under multi-channel output design; the linkage sequence refers to the control logic specifying the response order of each output channel and module under multi-channel switching and adjustment action; the combined signal refers to the discrimination basis formed by logically or physically combining multiple sensor signals, control signals, feedback signals, etc.; the control command refers to the operation command issued by the main control unit or chip to realize the synchronization of the actions of each adjustment unit or output module.

[0026] In S3, the power consumption detection unit refers to the module used to detect the energy consumption during the discharge process of the power bank. It is usually implemented by Hall element, shunt resistor or dedicated metering IC; real-time docking refers to the synchronous acquisition and correlation operation of the remaining capacity signal and the current power consumption signal inside the main control chip; the output power range refers to the range of electrical energy that the power bank is allowed to output after adjusting according to the remaining capacity and the current load demand (i.e., the power range of different levels or adjustment states).

[0027] In S4, the rate of temperature change refers to how quickly the temperature of the power bank's battery cells changes within a certain time period, which is a key indicator for measuring the risk of overheating; the jump characteristic refers to the phenomenon of instantaneous abnormal rise or fall at the temperature monitoring point, reflecting internal thermal runaway or other abnormalities; the protection limit refers to the boundary of the safe operating range set by the power bank, which triggers protection measures such as power cut-off or current limiting when exceeded; the judgment and marking refers to the control unit performing logical judgment on the collected temperature data, and if a risk is detected, the abnormal event is recorded and a risk label is attached.

[0028] In S5, the output channel hierarchical status refers to the current position or working state of the output power supply port in the control system, based on load classification and adjustment strategies; the power supply matching quantification index refers to the quantification result of the degree of adaptation between the current output and load demand, derived from real-time battery capacity and energy consumption data; the power range refers to the specific power supply range that the output port switches to according to the control command; the output channel refers to multiple power supply ports or virtual paths inside the power bank, whose opening and closing and power distribution are determined by the control logic; the disconnection condition refers to the interruption judgment criteria required to meet risk signals such as safety, temperature, and load; the shutdown command refers to the signal issued by the main control unit after detecting the disconnection condition, such as shutting down the power supply circuit and shutting down the relay, to achieve power failure protection.

[0029] like Figure 2 As shown, the specific steps for obtaining load classification features are as follows: S101: Based on external devices, analyze the voltage change of the port when the mobile power bank is connected for the first time. By recording the voltage change trend at each time point, calculate the voltage fluctuation in each time slice, compare the voltage rise and fall between consecutive sampling points, determine the speed of voltage change in each stage at the beginning of the connection, filter the voltage variation characteristics in each stage, and obtain the stage voltage fluctuation parameters. Upon detecting the first change in connection status at the Type-C port of the power bank, the control module immediately initiates a voltage sampling program. The sampling period is set to 1 millisecond, and the total sampling duration is set to 100 milliseconds. During this period, voltage values ​​are continuously collected to form a sequence, for example, sampling points V0 to V99. Each point represents the port voltage value at 1 millisecond. Subsequently, the voltage difference between two adjacent sampling points is calculated to obtain the ΔV sequence, which reflects the voltage change trend within each 1-millisecond time interval. When the ΔV value is greater than +0.15V, it is defined as a rapid rise; if the ΔV value is less than -0.15V, it is marked as a rapid fall; if the ΔV value is between -0.05V and +0.05V, it is considered to be in a stable range. After recording the status of all points, the window is divided into groups of 5 milliseconds. The system counts the number of rapid rises, rapid falls, and stable points within each window. If the number of points of a certain type exceeds 70%, the window is defined as the voltage fluctuation segment corresponding to that characteristic. For example, if 4 out of 5 sampling points in a segment have a ΔV of approximately +0.20V, then that segment is a rapid rise segment. Next, the average and standard deviation of the ΔV value for each segment are calculated. For example, if the ΔV values ​​in a segment are 0.18V, 0.21V, 0.17V, 0.19V, and 0.22V, with an average of 0.194V and a standard deviation of approximately 0.018V, the results are used as the fluctuation characteristic parameters for that segment. Then, all the stage fluctuation characteristics are combined to form the stage voltage fluctuation parameters, which describe the dynamic trend of voltage changes in the initial stage of external equipment connection, providing an electrical change basis for subsequent judgment of load type.

[0030] S102: Based on the stage voltage fluctuation parameters, determine the correlation between current change and impedance change within the same time period, compare the trend of current change during sudden changes with the synchronicity of impedance fluctuation, screen the signal differences formed by the combination of different parameters, optimize the classification criteria of multiple signal types, and obtain load classification characteristics. Within the time interval corresponding to each voltage stage, the control module retrieves the current and impedance value sequences from the sampled data, extracting continuous data at a 1-millisecond sampling period. For example, in a certain stage, the current sampling values ​​are 1.2A, 1.8A, 2.0A, 1.7A, and 2.1A, with corresponding impedance values ​​of 5.0Ω, 3.8Ω, 3.5Ω, 4.1Ω, and 3.2Ω. The module calculates the changes in current and impedance point by point and determines whether the current abrupt change point is consistent with the direction of impedance change. When the current increases while the impedance decreases, and this trend occurs consecutively for more than three sampling points, the stage is marked as a highly correlated abrupt change stage. The module then continues to examine the range of the rate of change within this stage. If the current increase at three consecutive points exceeds 0... If the impedance drops by more than 1Ω when the current increases by 0.5A, it is considered a drastic change, and the synchronicity is determined to be a strong coupling relationship. The current, impedance, and voltage states in this stage are then combined to form a multi-dimensional signal combination. By comparing the differences between the multi-dimensional combinations, for example, a current increase of 2A and an impedance decrease of 2Ω is considered a capacitive response characteristic, while a current decrease of 1.5A and an impedance increase of 2Ω is considered an inductive response characteristic. If the voltage, current, and impedance do not change drastically and the trend is slow and stable, it is determined to be a resistive load characteristic. Finally, each stage forms a complete set of identification signals, and the signals are assigned type codes such as "C01", "L01", and "R01", which are integrated to form load classification characteristics for reference by subsequent channel control links.

[0031] like Figure 3 As shown, the specific steps for obtaining the hierarchical status of the output channel are as follows: S201: Based on load classification characteristics, analyze the current changes of each load type during the startup phase. By monitoring the current fluctuations within a continuous time slice, compare the rate of change of the current curve in the different phases, determine the sensitivity of the load to the current response in the initial startup phase, screen the instantaneous current change characteristics of each load type, and obtain the current response trend parameters. First, different load types are categorized according to their identification codes. For example, resistive loads are marked as R01, inductive loads as L01, and capacitive loads as C01. Corresponding startup monitoring windows are then established for each type of load. The startup monitoring duration for each type of load is set to 200 milliseconds. During this period, current values ​​are collected in 1-millisecond increments, generating startup current sequences I0 to I199. Continuous interpolation is performed on the current data for each type of load, comparing the incremental changes in current between different time slices. The rate of change of the current is judged by comparing it with a set baseline value. The threshold for a sudden surge is set as a current increase greater than 0.4A / millisecond, the gradual rise range is set to 0.1A to 0.4A / millisecond, and the stable range is defined as less than 0.1A / millisecond. If a certain type of load experiences five consecutive current surges within 50 milliseconds before startup, and the maximum value exceeds 2.5A, then that type of load is marked as starting. The characteristics are highly sensitive to starting current. For example, inductive load L01, the current rapidly increases from 0.5A to 3.2A in the interval from 10 to 30 milliseconds, with a maximum change rate of 0.7A / millisecond. The fluctuation amplitude is significantly higher than that of capacitive load C01 in the same time period (0.25A / millisecond). Change rate statistics are performed on all sampling points to extract the mean, maximum and first abrupt change time of the current growth rate. This is used to construct the current response profile of each type of load in the starting phase. Representative current abrupt change point groups are selected. For example, the 12th, 13th and 14th milliseconds are selected as the abrupt change segment. The difference in current value before and after the abrupt change segment is calculated as the instantaneous change feature. Then, the abrupt change point group is bound to the load type to obtain the instantaneous current change feature description information of each type of load, forming the current response trend parameter to reflect the current change trend in the initial stage of starting.

[0032] S202: Based on the current response trend parameters, compare the action time sequence of the regulating component in each response stage, analyze the voltage fluctuations generated before and after the regulating component's action based on the voltage monitoring data, determine the feedback correspondence between the regulating component and the resistor input signal, determine the regulating capability of the regulating component, and obtain the channel regulating capability quantification group. The control flow record table corresponding to the load type is called, and the action time nodes of the regulating component corresponding to each type of current response are extracted. The order of the time sequence of the regulating component's actions such as turning on, closing, and adjusting is compared in different regulation stages. For example, in the current response corresponding to the resistive load R01, the MOSFET of the regulating component enters the conducting state at 15 milliseconds, while in the inductive load L01 it is at 9 milliseconds. After comparison, the timing sequence of the regulating action response under each load is recorded. At the same time, the voltage monitoring data of the corresponding time period is retrieved, and the fluctuation of the port voltage value before and after the regulating component action is compared. If the voltage is 2.5V before the action and rises steadily to 5.0V within 50 milliseconds after the action, then the voltage fluctuation amplitude of this stage is 2.5V. This value is taken as the voltage response range corresponding to the regulating component. The voltage change amplitude and duration under different stages of regulation action are further compared for each... Each action stage records the initial voltage, post-action voltage, duration of the change interval, and voltage recovery time. Combined with the sampled signal value at the resistor input, the signal change trend before and after the adjustment component's action is analyzed. For example, if the resistor input voltage is 0.6V before the adjustment and becomes 1.1V after the action, the signal change amplitude is 0.5V. Through this comparative analysis, it is determined whether the signal change timely affects the actual output state of the adjustment component. The degree of feedback relationship is quantitatively evaluated. If the response time after the signal change does not exceed 5 milliseconds and the resulting voltage change is greater than 1V, it is evaluated as a strong feedback relationship. Finally, parameters such as action response timing, voltage change amplitude, and feedback delay time are integrated to construct an evaluation set of the adjustment component's adjustment capability. The adjustment response performance index of each adjustment component at different stages is output in numerical form, ultimately forming a quantitative group of channel adjustment capabilities.

[0033] S203: Based on the channel adjustment capability quantization group, analyze the linkage relationship between control signal combinations in each channel, filter the control command types that trigger channel responses, determine the order of action of each control command in each channel, establish the corresponding state of channels and commands, and obtain the hierarchical state of output channels. The system retrieves all control signal combinations recorded in the output channel control tables and establishes a mapping table between signal combinations and channel responses in the channel control logic processing. It then extracts the actual trigger times of each control command on different channels and matches them with the channel regulation capability values ​​in the regulation capability quantification group. For example, if channel 1 has a high response capability value, the corresponding control command Cmd_A is executed within 5 milliseconds; if channel 2 has a medium response capability value, the corresponding execution time of Cmd_A is 12 milliseconds. The system records the order of their actions to form a channel response sequence set. By comparing the time intervals of the same control command's response in each channel, the system analyzes the correspondence between command propagation delay and channel feedback speed. The system further filters out channels that have priority in executing specific control commands. All control commands are triggered sequentially and arranged according to response time to form a channel response priority table. For example, for the command Cmd_B, it is executed before channel 1 in channel 3 and is recorded as channel 3 being executed first. The priority order of control commands among the channels is determined accordingly. Finally, a channel-command correspondence status group is constructed using a triplet of channel number, command number, and execution time. Channels with a response time of less than 10 milliseconds and a high level of adjustment capability are marked as first-level output channels, medium-level channels as second-level channels, and channels with a response time greater than 20 milliseconds or a low level of adjustment capability as third-level channels, thus forming a hierarchical status of output channels.

[0034] like Figure 4 As shown, the specific steps for obtaining the power supply matching quantitative index are as follows: S301: Based on the hierarchical status of the output channel, analyze the real-time power data of the corresponding power supply channel, determine the trend of battery remaining capacity change recorded by the power sensor at each sampling point, compare the synchronous fluctuation of battery data under different channel states, identify the impact of channel switching on battery state changes, and obtain the channel capacity fluctuation range. The power bank categorizes all available power channels according to their channel level numbers. For example, the first-level channel is designated CH1, the second-level channel CH2, and the third-level channel CH3. Channels are activated sequentially, and data from the power sensor is collected within the corresponding time period. The power sensor continuously records the remaining battery capacity of each channel at 100-millisecond intervals. The sampled data is then used to construct time-series datasets based on the channel number. For instance, channel CH1 records 50 sets of capacity data within a 5-second time period, gradually decreasing from 3200mAh to 2950mAh; CH2 decreases from 2950mAh to 2850mAh; and CH3 decreases by only about 30mAh, forming three sets of remaining capacity change curves with significant differences. Continuous data interpolation is then performed on each curve to calculate the capacity change amplitude between adjacent sampling points and the average rate of change within that channel. A rate greater than 15mAh / s is defined as a high-capacity consumption curve. The consumption channels are defined as follows: 5 to 15 mAh / s is defined as medium consumption channels, and less than 5 mAh / s is defined as low consumption channels. After completing the above statistics, the capacity change patterns of different channels under startup, stable, and switching states are compared. The remaining capacity values ​​before and after the channel switching time are recorded, and the capacity change trend of three consecutive sampling points before and after the switching is statistically analyzed. If the channel switching causes the remaining capacity decrease rate to increase by more than 20%, it is determined that the switching has a sudden impact on the battery state. For example, after CH2 is taken over by the channel, its power decrease rate increases from 8 mAh / s to 12 mAh / s, which is classified as a segment with a significant increase in capacity fluctuation. All channel switching events are mapped one-to-one with the changes in battery capacity response. By establishing a channel state-capacity change mapping set, the boundaries of the rapid fluctuation segments are calibrated. The calibration method is to mark the starting sampling point, the ending sampling point, the total amplitude of the fluctuation, and the corresponding channel number, and output the channel capacity fluctuation range.

[0035] S302: Based on the remaining power data of each time period in the channel capacity fluctuation range, collect the discharge process monitored by the power consumption detection unit, compare the synchronization between the power consumption and the remaining energy of the battery within the time period, analyze the direction of change of power consumption trend and mark the rate of change, and obtain the discharge matching parameter set. The energy consumption detection unit is further activated, and the actual power consumption data records within that time period are retrieved. For each fluctuation interval, the same start and end time intervals are set. The power consumption and remaining battery capacity values ​​for the same time slice are extracted from the two data sources to form comparative data pairs. For example, if the battery capacity decreases from 3200mAh to 3000mAh within 10 seconds of a certain channel fluctuation segment, while the energy consumption detection unit records a discharge of 190mAh, the difference between the two data points is determined to be 10mAh. Within the error threshold range of 5%, it is marked as a synchronous discharge state. If the error exceeds this range, it is determined as an asynchronous state. The rate of power decrease and the trend of discharge change in the synchronous state are compared to further label the rate of power decrease per second, categorized by speed zone. The discharge rate is divided into different levels, for example, a rate of decrease greater than 25 mAh / s is a fast discharge segment, 10 to 25 mAh / s is a medium discharge segment, and less than 10 mAh / s is a slow discharge segment. Then, the trend direction of each segment is identified. If the discharge rate continues to rise throughout the time period, it is defined as an accelerating discharge trend. If it continues to fall, it is a decelerating discharge trend. If the change has no significant trend and is stable within a certain range, it is marked as a constant discharge trend. The trend type, discharge rate value, synchronization mark status, and capacity change amplitude are output in a unified manner to form a complete discharge behavior description structure. Finally, the above description results under all fluctuation segments are sorted out and summarized into a discharge matching parameter set used to describe the relationship between the actual discharge and capacity change of the battery.

[0036] S303: Based on the correspondence between the remaining energy and the power consumption trend in the discharge matching parameter group, analyze the matching degree between the current channel output state and the battery power supply capacity, screen the power range that meets the continuous output requirements, label the output characteristics of each channel, and obtain the power supply matching quantitative index. The matching degree between the current channel output state and battery power capacity is analyzed using the formula: , By selecting power ranges that meet continuous output requirements and labeling the output characteristics of each channel, quantitative indicators of power supply matching are obtained. in, Representative moment Power supply matching index for each channel Representing the Each channel at time The actual output power Representing the Each channel at time Recommended upper limit of output power, Representing the Each channel at time The equivalent permissible average power is calculated from the remaining electrical energy of the corresponding channel based on the current sampling period length. Representing the Each channel at time Based on the power consumption trend, the equivalent power increment formed within the current sampling period, This represents the total number of currently active output channels; The power supply matching quantitative index is a quantitative reflection of the degree of matching between the current actual power supply status of each output channel and its battery power supply capacity. Specifically, this index compares the difference between the actual output power of each output channel and the recommended upper limit of output power in the current sampling period, combines the power increment formed by the power conversion of the remaining power of each channel and the power consumption trend, and after normalization, obtains a value that can reflect the overall power supply adaptation status of all channels.

[0037] To analyze the matching degree between the current channel's output status and battery power capacity, the actual output power of each channel within the current sampling period is first obtained. Compared with the recommended upper limit of output power Perform the absolute value calculation of the difference between the two: Channel 1 is ; Channel 2 is ; Channel 3 is ; Summing the results from the three channels yields the total deviation value for the numerator: ; Then, the equivalent residual power of each channel is obtained. and They are respectively: Channel 1 , ; Channel 2 , ; Channel 3 , ; After adding the two terms and normalizing them, the normalized three-channel values ​​are 6.23, 6.87, and 6.98, respectively. The sum of the three squares is calculated as follows: ; The square root of the sum and the normalization factor of the denominator are: ; Divide the total deviation by the normalization factor, and calculate using the following formula: ; Power supply matching index It can be divided into the following three main sections, which reflect the current power supply status of the channel group: when When the power supply level is "Adaptation Level I", it is determined to be in the normal matching range, which means that the actual output power of each channel deviates little from the recommended power and is in a sustainable power supply state. when When the power supply level is "Adaptation Level II", it is determined to be a critical matching interval, which means that some channels have excessively high output or increased battery load pressure, and the power supply trend monitoring state should be entered. when When this occurs, it is determined to be in a mismatch risk zone, and the corresponding power supply level is "Adaptation Level III". This means that the current output deviates significantly from the recommended power, and it is necessary to switch channels or implement power limiting or shutdown strategies.

[0038] The result is It is within the first interval, that is The results show that the current channel output state and battery power supply capacity have a good matching relationship, and are at the preset "adaptation level I". This indicates that the current channel can be classified as a sustainable power supply channel, and the channel status is marked as "stable output". The formula processes the absolute sum of the actual power deviation of the channel and forms a ratio with the square root of the sum of the squares of the normalized remaining energy and power consumption trend parameters. This ensures that the matching degree assessment takes into account the quantitative performance of both power demand and battery resources. The dimensionless normalization of parameters ensures that the formula calculation is stable and comparable across cycles. Each parameter has a real-time measurement basis, avoiding model dependency issues, which helps to simplify the structure and ensure consistent execution. The power range that meets the continuous output requirements is selected, the output characteristics of each channel are marked, and the quantitative index of power supply matching is obtained. .

[0039] like Figure 5 As shown, the specific steps for obtaining the power supply safety assessment indicator are as follows: S401: Based on the power supply matching quantitative index, monitor the temperature performance of the battery cell group in each sampling period, analyze the temperature records of each sampling point, determine the changes in the temperature rise and fall phases, compare the trend of the difference between the maximum and minimum temperatures, identify the temperature fluctuation characteristics in each time period, and obtain the temperature rate distribution characteristics. First, a sampling period is set in the temperature acquisition module of the battery cell assembly, for example, 1 second as one period. Within each period, the temperature data of all battery cell points are recorded sequentially, forming a complete temperature sequence record table. For example, within a 10-second sampling period, data points such as 29℃, 30.2℃, 31.5℃, 32.8℃, and 34℃ are obtained sequentially. Then, the temperature changes between adjacent sampling points are compared point by point. If the temperature at a later time is higher than the previous time, it is marked as an upward segment; otherwise, it is marked as a downward segment. The average increase amplitude for all upward segments and the average decrease amplitude for all downward segments are recorded. When the amplitude is greater than 0.8℃ / second, it is classified as a fast range; between 0.3℃ / second and 0.8℃ / second is a medium range; and less than 0.3℃ / second is a slow range. Then... Within the same period, the difference between the maximum and minimum temperatures is selected. For example, in the above data, the maximum value is 34℃, the minimum value is 29℃, and the difference is 5℃. This difference is compared with a set benchmark value, which is set to 4℃. If the difference is greater than this value, it is considered that there is a strong fluctuation trend within the period. If the difference is less than this value, it is determined to be a stable temperature range. Then, the temperature difference of each sampling period is matched with the rate range to form a time-series distribution table. The time-series distribution table is used to identify certain periods that show a pattern of rapid heating followed by slow cooling, as well as patterns that maintain a slow temperature rise for a long time. Finally, in the summary process, the rate range and difference judgment results of each period are integrated to output the temperature rate distribution characteristics of the battery pack within the entire monitoring window.

[0040] S402: Analyze the temperature rate distribution characteristics of the jumps in different time periods, determine the fluctuation rate corresponding to the temperature change segment, identify the abnormal jump characteristics that occur within the temperature acquisition cycle, compare with the safety range of the protection limit, mark the data points with abnormal changes, and obtain the thermal risk warning factor. First, the rate interval categories are compared between consecutive cycles. When the temperature rate is in a slow interval in a certain cycle, and then suddenly jumps to a fast interval in the next cycle with a change exceeding 1℃ / second, it is marked as a jump event. The start and end times of the jump are recorded in the event table. For example, if the temperature rise rate is only 0.2℃ / second in the 15th second cycle, and then suddenly increases to 1.1℃ / second in the 16th second, the jump amplitude is 0.9℃ / second, which meets the conditions for a sudden change event. Then, all similar jumps in the entire temperature distribution table are screened, and each jump duration is recorded and calculated. If the duration is less than 3 seconds, it is defined as a short-term sudden change; if the duration is greater than or equal to 3 seconds, it is defined as a long-term sudden change. Next, it is determined whether the jump event has reached the protection limit range. The protection limit is set when the temperature exceeds 6℃. If a detected temperature jump event meets either condition (e.g., 0℃ or a rate of increase exceeding 1.5℃ / second), the corresponding sampling point is marked as an anomaly. For example, if the temperature is 59℃ at the 22nd second and rises to 61℃ at the 23rd second at a rate of 2℃ / second, exceeding the protection limit, then the data point at the 23rd second is marked as an anomaly. This process is repeated point-by-point, comparing all jump events with the protection limit. The marked anomalies are then compiled into a thermal risk dataset, and each anomaly is assigned a warning level. Level 1 is considered a mild anomaly, corresponding to a temperature between 60℃ and 65℃ or a rate between 1.5℃ / second and 2℃ / second; Level 2 is considered a severe anomaly, corresponding to a temperature above 65℃ or a rate exceeding 2℃ / second. Finally, a set of data points with level labels is output, forming a thermal risk warning factor.

[0041] S403: Based on thermal risk warning factors, filter the temperature risk parameters associated with the current power supply status, determine whether the collected temperature changes trigger protection conditions, mark the operating status of the power supply circuit according to the judgment results, and obtain the power supply safety judgment mark. The formula used to determine whether the collected temperature change triggers the protection condition is: ; Calculate the temperature fluctuation judgment value Based on the judgment results, the operating status of the power supply circuit is marked to obtain the power supply safety judgment mark, among which, This represents the total number of sampling points within the sampling period. Representing the Temperature data at each sampling time, This represents the average value of all temperature data within the sampling period. This represents the maximum temperature collected within the sampling period. This represents the minimum temperature collected within the sampling period. This represents the variance of all temperature data within the sampling period. This represents a very small positive number used to avoid a denominator of zero.

[0042] The temperature fluctuation judgment value is a numerical result used to comprehensively measure the amplitude of temperature change and the dispersion of temperature distribution within the sampling period. This value is calculated by comparing the mean deviation of the temperature at each sampling point from the average temperature of the sampling period, the range of the sampling period, and the variance. It is used to reflect the overall temperature fluctuation characteristics within the current period. The larger the value, the more drastic the temperature change or the stronger the fluctuation during the sampling period. This indicator is often used in the power supply safety judgment process to help identify whether there are abnormal temperature fluctuations, sudden changes, or instability. It is one of the key bases for determining whether protection conditions are triggered.

[0043] The temperature change data collected within the sampling period is used to determine whether the power supply system meets the criteria for triggering protection. The sampling period is set to 4 seconds, and the sampling frequency is 1Hz. Therefore, the system collects a total of 4 sets of temperature data within this period, denoted as... ,in In this embodiment, the original temperature data collected were 36.2℃, 37.8℃, 38.5℃, and 40℃. After normalization, these values ​​corresponded to 0.21, 0.63, 0.79, and 1, respectively. This normalization result was used for mathematical calculations in the subsequent judgment process. First, according to the formula for calculating the average value: , Substituting this value into the first operation, the system calculates the square of the difference between each term and the mean, i.e.: ; ; ; ; Then, summing and averaging are performed to obtain the value of the first term: ; Next, based on the maximum value in the normalized temperature data... and minimum value The range is calculated as follows: ; The system is set to normalized variance as and set a tiny positive number. Substitute into the formula in the second part: ; Finally, the temperature fluctuation judgment value for this cycle is calculated: ; This result indicates that the temperature fluctuation judgment value within the current sampling period... If the temperature falls within the preset safe range [0, 3.0], according to the system's set judgment range division criteria, the various ranges of the temperature fluctuation judgment value and their corresponding states are as follows: like If so, it is determined to be in "normal operating state" and no power supply adjustment is triggered; like If the situation is as described above, it will be classified as a "moderate fluctuation warning" and marked as a risk state. The system will need to activate the delayed response mechanism or channel pre-adjustment. like If the system is in a state of high fluctuation, it will be identified as a "high fluctuation warning". The system will need to operate with limited power on some channels and enter a semi-protection state. like If the signal is not received, it will be judged as "severe fluctuation exceeding the limit", triggering the power supply shutdown logic and marking the power supply channel as "abnormal disconnection".

[0044] like Figure 6 As shown, the specific steps for obtaining the power supply control status signal are as follows: S501: Based on the power supply safety judgment mark, analyze the channel level corresponding to the current output channel classification status, determine the switching conditions of the power supply switch status under each channel, compare the adjustment instructions of the safety judgment signal to the power supply switch, and perform switching adjustment on each output channel in sequence to obtain the channel switching instruction sequence. The system reads the hierarchical status of all current output channels, classifying them into Level 1, Level 2, and Level 3 according to their level numbers. It then confirms the status of the power supply switch for each channel; for example, CH1 is in the ON state, CH2 is in the OFF state, and CH3 is in the standby state. Subsequently, it compares each channel with a safety judgment signal. When the signal is marked "Temperature Warning Mark," it determines whether a channel downgrade switch is needed. When the signal is marked "Disconnect Execution Code," it determines whether to directly shut down the power supply switch for the corresponding channel. During execution, the system first reads the current switch status of the channel, then calls the corresponding instruction in the safety judgment signal for comparison. For example, if CH1 is in the ON state but the safety judgment signal requires it to be closed, a shutdown action record is generated and the switch is executed. If CH2 is in the OFF state but the signal requires it to be opened, an open action instruction is issued. This process sequentially completes the adjustment operation for each channel, gradually forming a switch adjustment record arranged by channel number, such as CH1 OFF, CH2 OFF, CH3 OFF, ultimately forming a channel switching instruction sequence.

[0045] S502: Based on the channel switching command sequence and combined with the power supply matching quantification index, analyze the correspondence between the power difference range and the output channel, determine the switching order of the output channel in each power range, filter the output channel that currently meets the power allocation requirements, and combine the matched power range with the channel status to obtain the power allocation mapping group; The power range is divided according to the power supply matching quantitative index. For example, the low power range is set to 0 to 10W, the medium power range to 10 to 30W, and the high power range to 30 to 60W. Each switching command is then matched with a corresponding power range. During the matching process, it is determined whether the channel specified by the command meets the power carrying capacity of that range. For example, the carrying capacity of channel CH1 is 50W, CH2 is 20W, and CH3 is 8W. When the switching command requires the channel to be activated in the high power range, CH1 is selected as the execution channel; when the switching command requires the channel to be activated in the medium power range, CH3 is selected as the execution channel. CH2 is selected as the execution channel. When the switching command is triggered in the low power range, CH3 is selected as the execution channel. Then, the response order is arranged according to the channel carrying capacity of each range. If multiple channels meet the range conditions, the channel with the shorter response time is selected first. For example, in the medium power range, both CH2 and CH1 can meet the requirements, but CH2 has a response time of 5 milliseconds and CH1 has a response time of 10 milliseconds. In this case, CH2 is selected first. The final selected channel number is bound to its power range to generate a corresponding combination of power range and channel status. Each entry is recorded as a mapping entry. Finally, all entries are summarized to form a power allocation mapping group.

[0046] S503: Based on the power distribution mapping group, determine whether the temperature monitoring signal triggers the disconnection condition, analyze the disconnection judgment parameters in the monitoring information, determine whether a shutdown command needs to be issued, record the shutdown action and main power supply disconnection status, and obtain the power supply control status signal. The system continues to call real-time data from the temperature monitoring module to determine the status of each sampling point. When the monitored temperature exceeds the set threshold or the temperature rise rate exceeds the limit, the point is marked as a trigger disconnection condition. The threshold is set to 60℃ and the limit is set to 1.5℃ per second. If the power allocation mapping entry corresponding to a certain channel is within the time period of the abnormal point, it is determined that the power supply needs to be interrupted immediately. After the determination is completed, a shutdown command is generated and sent to the control switch of the corresponding channel. At the same time, the sending time and the execution action are recorded. For example, if the cell temperature reaches 61℃ and the rise rate is 1.7℃ per second at 25 seconds, the disconnection condition is triggered, a shutdown command is generated and the main power supply is cut off. The operation log records "25 seconds, channel CH1 is turned off, main power supply is turned off". The disconnection operation of all channels under abnormal conditions is completed in sequence. Finally, the records of all shutdown actions and main power supply cut-off status are summarized to form a unified power supply control status signal.

[0047] like Figure 7 As shown, the power supply control system of the mobile power bank includes: The load identification module is based on external devices. It analyzes the instantaneous voltage change when the power bank is first connected, determines the synchronization status of the initial current signal and impedance change, monitors the voltage and current dynamics of the Type-C power interface during load connection, detects the current flow direction through the bidirectional output unit, combines the different signal types for feature identification, and obtains the load classification characteristics. The output regulation module sets instantaneous current change parameters based on load classification characteristics, optimizes the response action of the regulation components according to the voltage change rate, coordinates the resistance parameter input regulation circuit, uses multi-channel signal switching to control the linkage sequence of the output channels, and executes control commands in sequence according to the combined signals to obtain the graded status of the output channels. The energy matching module is based on the graded status of the output channel. It obtains the remaining battery capacity through the power sensor, calls the energy consumption detection unit to collect power consumption changes, connects the remaining capacity signal and the power consumption signal in real time, and adjusts the output power range according to the remaining capacity to obtain the power supply matching quantitative index. The temperature control monitoring module monitors the temperature of the battery cells inside the power bank based on the power supply matching quantitative index, reads the maximum and minimum temperatures in each sampling cycle, identifies the rate of temperature change and jump characteristics, and performs judgment and marking according to the protection limit to obtain the power supply safety judgment mark. The safety power supply disconnection module adjusts the power supply switch according to the graded status of the output channel based on the power supply safety judgment mark, selects the power range and output channel in conjunction with the power supply matching quantitative index, determines whether the disconnection condition has been entered based on temperature monitoring information, issues a shutdown command and cuts off the main power supply, and obtains the power supply control status signal.

[0048] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A power supply control method for a mobile power bank, characterized in that, The method includes: S1: Based on external devices, analyze the instantaneous voltage change when the power bank is first connected, determine the synchronization status of the initial current signal and impedance, monitor the voltage and current dynamics of the Type-C power supply interface during load connection, and combine the difference signals for feature recognition to obtain load classification features. S2: Based on the load classification characteristics, set instantaneous current change parameters, optimize the action of the adjustment components according to the voltage change rate, coordinate the resistance parameter input adjustment circuit, control the linkage sequence of the output channels through multi-channel signal switching, execute commands according to the combined signals, and obtain the graded status of the output channels; S3: Based on the graded status of the output channel, obtain the remaining battery capacity, collect power consumption changes, connect the remaining capacity and power consumption signals, adjust the output power range, and obtain power supply matching quantitative indicators. S4: Based on the power supply matching quantitative index, monitor the temperature of the mobile power cell group, read the maximum and minimum temperatures of each sampling period, identify the temperature change rate and jump characteristics, perform judgment and marking according to the protection limit, and obtain the power supply safety judgment mark.

2. The power supply control method for a mobile power bank according to claim 1, characterized in that, The load classification features include load category code, dynamic feature identifier, and interface identification information; the output channel classification status includes channel level number, power supply switching identifier, and priority response information; the power supply matching quantification indicators include capacity allocation factor, power adjustment coefficient, and load adaptation parameters; and the power supply safety judgment identifiers include temperature warning mark, protection response level, and thermal runaway warning signal.

3. The power supply control method for a mobile power bank according to claim 1, characterized in that, The specific steps for obtaining the load classification features are as follows: S101: Based on external devices, analyze the voltage change of the port when the mobile power bank is connected for the first time. By recording the voltage change trend at each time point, calculate the voltage fluctuation in each time slice, compare the voltage rise and fall between consecutive sampling points, determine the speed of voltage change in each stage at the beginning of the connection, filter the voltage variation characteristics in each stage, and obtain the stage voltage fluctuation parameters. S102: Based on the stage voltage fluctuation parameters, determine the correlation between current change and impedance change within the same time period, compare the trend of current change during sudden changes with the synchronicity of impedance fluctuation, screen the signal differences formed by the combination of different parameters, optimize the classification criteria of multiple signal types, and obtain load classification characteristics.

4. The power supply control method for a mobile power supply according to claim 1, characterized in that, The specific steps for obtaining the hierarchical status of the output channel are as follows: S201: Based on the load classification characteristics, analyze the current changes of each load type during the startup phase. By monitoring the current fluctuations within a continuous time slice, compare the rate of change of the current curves in different phases, determine the sensitivity of the load to the current response in the initial startup phase, screen the instantaneous current change characteristics of each load type, and obtain the current response trend parameters. S202: Based on the current response trend parameters, compare the action time sequence of the regulating component in each response stage, analyze the voltage fluctuations generated before and after the action of the regulating component based on the voltage monitoring data, determine the feedback correspondence between the regulating component and the signal at the resistor input terminal, determine the regulating capability of the regulating component, and obtain the channel regulating capability quantification group. S203: Based on the channel adjustment capability quantization group, analyze the linkage relationship between control signal combinations in each channel, filter the control command types that trigger channel responses, determine the order of action of each control command in each channel, establish the corresponding state of channels and commands, and obtain the output channel hierarchical state.

5. The power supply control method for a mobile power supply according to claim 1, characterized in that, The specific steps for obtaining the power supply matching quantitative index are as follows: S301: Based on the graded status of the output channel, analyze the real-time power data of the corresponding power supply channel, determine the trend of battery remaining capacity change recorded by the power sensor at each sampling point, compare the synchronous fluctuation of battery data under different channel states, identify the impact of channel switching on battery state changes, and obtain the channel capacity fluctuation range. S302: Based on the remaining power data of each time period in the channel capacity fluctuation range, collect the discharge process monitored by the power consumption detection unit, compare the synchronization between the power consumption and the remaining battery energy within the time period, analyze the direction of change of power consumption trend and mark the rate of change, and obtain the discharge matching parameter set. S303: Based on the correspondence between the remaining energy and the power consumption trend in the discharge matching parameter group, analyze the matching degree between the current channel output state and the battery power supply capacity, screen the power range that meets the continuous output requirements, mark the output characteristics of each channel, and obtain the power supply matching quantitative index.

6. The power supply control method for a mobile power bank according to claim 1, characterized in that, The specific steps for obtaining the power supply safety determination identifier are as follows: S401: Based on the power supply matching quantitative index, monitor the temperature performance of the battery cell group in each sampling cycle, analyze the temperature records of each sampling point, determine the changes in the temperature rise and fall phases, compare the trend of the difference between the maximum and minimum temperatures, identify the temperature fluctuation characteristics in each time period, and obtain the temperature rate distribution characteristics. S402: Analyze the temperature rate distribution characteristics in different time periods, determine the fluctuation rate corresponding to the temperature change section, identify the abnormal jump characteristics that occur in the temperature acquisition cycle, compare with the safety range of the protection limit, mark the data points with abnormal changes, and obtain the thermal risk warning factor. S403: Based on the thermal risk warning factor, filter the temperature risk parameters associated with the current power supply status, determine whether the collected temperature changes trigger the protection conditions, mark the operating status of the power supply circuit according to the judgment result, and obtain the power supply safety judgment mark.

7. The power supply control method for a mobile power supply according to claim 1, characterized in that, The method further includes: S5: Based on the power supply safety judgment mark, combined with the output channel graded status adjustment power supply switch, the power supply matching quantitative index is linked to select the power range and output channel, the disconnection condition is judged according to the temperature monitoring information, and a shutdown command is issued to cut off the main power supply to obtain the power supply control status signal. The power supply control status signals include disconnect execution code, power conversion identifier, and channel status command.

8. The power supply control method for a mobile power supply according to claim 7, characterized in that, The specific steps for obtaining the power supply control status signal are as follows: S501: Based on the power supply safety judgment identifier, analyze the channel level corresponding to the current output channel classification state, determine the switching conditions of the power supply switch state under each channel, compare the adjustment instructions of the safety judgment signal to the power supply switch, and adjust the switch of each output channel in sequence to obtain the channel switching instruction sequence. S502: Based on the channel switching instruction sequence and combined with the power supply matching quantification index, analyze the correspondence between the power difference range and the output channel, determine the switching order of the output channel in each power range, filter the output channel that currently meets the power allocation requirements, and combine the matched power range with the channel status to obtain the power allocation mapping group; S503: Based on the power distribution mapping group, determine whether the temperature monitoring signal triggers the disconnection condition, analyze the disconnection judgment parameters in the monitoring information, determine whether a shutdown command needs to be issued, record the shutdown action and main power supply disconnection status, and obtain the power supply control status signal.

9. The power supply control method for a mobile power supply according to claim 1, characterized in that, The instantaneous voltage change refers to the change in voltage across the port over time when the external device is first connected to the power bank. The initial current signal refers to the current data detected in the first time slice during the initial connection of the device. The output power range refers to the range of electrical energy that the power bank is allowed to output after adjusting its remaining capacity and current load requirements.

10. A power supply control system for a portable power bank, said system being used to implement the power supply control method for a portable power bank as described in any one of claims 1-9, characterized in that, The system includes: The load identification module is based on external devices. It analyzes the instantaneous voltage change when the power bank is first connected, determines the synchronization status of the initial current signal and impedance change, monitors the voltage and current dynamics of the Type-C power interface during load connection, detects the current flow direction through the bidirectional output unit, combines the different signal types for feature identification, and obtains the load classification characteristics. Based on the load classification characteristics, the output regulation module sets instantaneous current change parameters, optimizes the response action of the regulation component according to the voltage change rate, coordinates the resistance parameter input regulation circuit, uses multi-channel signal switching to control the linkage sequence of the output channels, and executes control commands in sequence according to the combined signals to obtain the graded state of the output channels. Based on the graded status of the output channel, the energy matching module obtains the remaining battery capacity through the power sensor, calls the energy consumption detection unit to collect power consumption changes, connects the remaining capacity signal and the power consumption signal in real time, and adjusts the output power range according to the remaining capacity to obtain the power supply matching quantitative index. Based on the power supply matching quantitative index, the temperature control monitoring module monitors the temperature of the battery cell group inside the power bank, reads the maximum and minimum temperature in each sampling cycle, identifies the temperature change rate and jump characteristics, and performs judgment and marking according to the protection limit to obtain the power supply safety judgment mark. Based on the power supply safety judgment mark, the safety power supply module adjusts the power supply switch according to the graded status of the output channel, selects the power range and output channel by linking the power supply matching quantitative index, judges whether the disconnection condition is entered based on the temperature monitoring information, issues a shutdown command and cuts off the main power supply, and obtains the power supply control status signal.

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