Dual-core fusion power supply sub-core load adaptation and parent core energy supplement linkage system and method

Abstract

This invention belongs to the field of power system control technology. It discloses a system and method for the linkage between sub-core load adaptation and main core power replenishment in a dual-core fused power supply. The system includes: calculating the main core's instantaneous power replenishment margin based on the current state of charge of the main core management unit and the real-time available output capacity of the main core converter; sending a low-voltage detection pulse sequence to the sub-cores and simultaneously acquiring the returned damping attenuation waveform and instantaneous leakage current value; determining a dynamic access threshold, comparing the current real-time load power with the dynamic access threshold, and generating a continuous load adaptation tag and a sub-core locking identifier; establishing a sub-core priority power replenishment sequence, and immediately tightening the access conditions of the sub-core priority power replenishment sequence when the instantaneous power replenishment margin is lower than a preset warning value; activating a fast power replenishment channel for sub-cores that meet the preset power replenishment triggering conditions, while simultaneously performing dynamic power backtracking on unlocked sub-cores until the main core's instantaneous power replenishment margin recovers to or above the safety threshold; significantly improving energy efficiency.

Description

Technical Field

[0001] This invention relates to the field of power system control technology, and more specifically, to a system and method for load adaptation of the sub-core and power replenishment of the main core in a dual-core fusion power supply. Background Technology

[0002] With the diversification of temporary power supply needs in outdoor work scenarios, mobile power supplies, as an important energy carrier for power tools, are playing an increasingly crucial supporting role in construction sites, emergency repairs, and field operations. To address the inherent contradiction between portability and large capacity, a dual-core fusion power architecture has emerged. This architecture, through the collaborative configuration of sub-core units and parent core units, balances the dual requirements of lightweight portability and continuous power supply, providing a new technical path for powering power tools under complex working conditions.

[0003] In construction sites, the insulation performance and operating status of load equipment dynamically deteriorate due to factors such as continuous operation time, changes in ambient temperature and humidity, and mechanical wear. Existing technologies only perform load compatibility testing as a static pre-supply step, relying on manual visual inspection or a single insulation test for judgment. This makes it impossible to track and test changes in insulation impedance, abnormal leakage current, and power consumption characteristic drift on the load side in real time during continuous power supply. In addition, the main development trend of mobile power supplies is small portability and high-power energy storage. Although small portable power supplies are lightweight and convenient, their capacity is limited and cannot meet the demand for high power for a long time. While high-power energy storage power supplies provide reliable power supply, they are large and inconvenient to transport. When dealing with the power needs of emergency accidents, emergency power vehicles on the market usually provide power with higher power and capacity, but their usage rate is low in daily use, resulting in resource waste.

[0004] In view of this, the present invention proposes a sub-core load adaptation and parent core power replenishment linkage system and method for a dual-core fusion power supply to solve the above problems. Summary of the Invention

[0005] To overcome the aforementioned deficiencies of the prior art and to achieve the above objectives, the present invention provides the following technical solution: a method for the linkage between sub-core load adaptation and parent core power replenishment in a dual-core fusion power supply, comprising: Step S1: The core management unit collects the current remaining capacity, sub-core type identifier, and real-time voltage ripple coefficient of all connected sub-cores in real time. Based on the current state of charge of the core management unit and the real-time available output capacity of the core converter, the instantaneous power replenishment margin of the core is calculated. Step S2: Perform continuous closed-loop insulation tracking detection on each connected load. The main core management unit sends an alternating low-voltage detection pulse sequence to the sub-core. The sub-core injects the detection pulse sequence into the load circuit and simultaneously collects the returned damping attenuation waveform and instantaneous leakage current value to obtain the real-time insulation health of the load. Step S3: Determine the dynamic access threshold of the load based on the real-time insulation health of the load and the sub-core type identifier, compare the current real-time power of the load with the dynamic access threshold, and generate a load continuous adaptation tag and a sub-core lock identifier. Step S4: The mother core management unit establishes a priority power replenishment sequence for sub-cores based on the load continuously adapting tags and sub-core locking identifiers of all sub-cores, and immediately tightens the admission conditions of the priority power replenishment sequence for sub-cores when the real-time power replenishment margin of the mother core is lower than the preset warning value. Step S5: The mother core management unit starts the fast power replenishment channel for the sub-cores that meet the preset power replenishment trigger conditions in sequence according to the sub-core priority power replenishment sequence and the mother core real-time power replenishment margin. At the same time, it performs dynamic power back-switch for the unlocked sub-cores until the mother core real-time power replenishment margin is restored to the safety threshold or above.

[0006] Furthermore, the methods for obtaining immediate energy replenishment margin for the parent core include: The current state of charge of the parent core energy storage system is converted into usable energy. The minimum reserve capacity of the parent core converter to maintain itself and switch off-grid is deducted, and the sum of the minimum maintenance power declared by all locked sub-cores in the most recent control cycle is subtracted. The result is used as the immediate energy replenishment margin of the parent core.

[0007] Furthermore, the method of sending alternating low-voltage probe pulse sequences from the parent core management unit to the daughter core includes: The parent core management unit dynamically selects the pulse amplitude and duty cycle according to the sub-core type identifier. Before each injection, it performs an instantaneous evaluation of the ripple coefficient of the sub-core output voltage. When the ripple coefficient exceeds the ripple tolerance band corresponding to the sub-core type, it automatically reduces the detection pulse amplitude until the ripple coefficient falls back into the tolerance band.

[0008] Furthermore, the methods for obtaining the real-time insulation health of the load include: The envelope of the returned damping attenuation waveform is extracted and the attenuation time constant is calculated. The ratio of the instantaneous value of the leakage current to the amplitude of the detection pulse is used as the instantaneous leakage admittance. The attenuation time constant and the instantaneous leakage admittance are weighted and fused and mapped to the preset health scale to obtain the real-time insulation health of the load. When the real-time insulation health of the load is lower than D percent of the historical average for three consecutive times, it is immediately marked as a rapid deterioration state.

[0009] Furthermore, the methods for determining the dynamic admission threshold include: Select the corresponding basic access power based on the sub-core type identifier; dynamically adjust the basic access power to obtain the dynamic access threshold: when the real-time insulation health of the load is higher than the first health threshold, add a positive compensation amplitude to the basic access power; when the real-time insulation health of the load is between the first health threshold and the second health threshold, keep the basic access power unchanged; when the real-time insulation health of the load is lower than the second health threshold or is marked as a rapid deterioration state, reduce the basic access power proportionally until the minimum safe power.

[0010] Furthermore, the methods for comparing the current real-time load power with the dynamic admission threshold to generate load continuous adaptation tags and sub-core lock identifiers include: The core management unit performs three sliding comparisons of the current load real-time power with the dynamic admission threshold at different time scales in each control cycle, and obtains instantaneous comparison results, short-cycle average comparison results and long-cycle trend comparison results respectively. When the instantaneous comparison result shows that the current load real-time power exceeds the dynamic access threshold by E percent twice in a row, an instantaneous overload warning label is immediately generated for the sub-core. When the short-cycle average comparison results show that the average load power of the most recent ten control cycles exceeds F percent of the dynamic admission threshold and is accompanied by a monotonically decreasing real-time insulation health of the load, a continuous overload risk label is attached to the subcore. When the long-term trend comparison results show that the load power is monotonically increasing in the most recent minute and the rate of increase exceeds N times the slope threshold corresponding to the sub-core type, an abnormal power ramp label is added to the sub-core. The parent core management unit logically superimposes instantaneous overload warning tags, continuous overload risk tags, and power ramp-up anomaly tags. Any subcore with any two or more tags is marked as having continuous load adaptation failure, and a subcore lock flag is generated simultaneously. For subcores with only one tag, a continuous load adaptation degradation tag is generated, and the parent core management unit forcibly shifts its priority replenishment sequence position down three places during subsequent replenishment. For subcores without any tags, a continuous load adaptation optimization tag is generated, and its priority replenishment sequence position remains unchanged.

[0011] Furthermore, methods for establishing the daughter nucleus preferential energy replenishment sequence include: All sub-cores that generate continuous load adaptation tags are sorted from low to high based on their remaining capacity. If the remaining capacity is the same, they are further sorted from high to low based on the real-time insulation health of the load, and a sub-core with a sub-core locking flag is forcibly inserted at the beginning of the sequence.

[0012] Further, step S5 includes: Divide the immediate energy replenishment margin of the mother core by the maximum energy replenishment requirement of the daughter core that ranks first in the current priority energy replenishment sequence to obtain the margin coverage ratio. Set the power replenishment trigger conditions, which include the margin coverage ratio threshold and the capacity threshold. When the margin coverage ratio is greater than the margin coverage ratio threshold and the remaining capacity of the sub-core is lower than the capacity threshold, the fast power replenishment channel is opened and the sub-core is powered by the maximum allowable current of the mother core converter. At the same time, dynamic power back-shifting is performed on the unlocked sub-cores in the sequence that have not yet been reached, gradually reducing their current output power to the minimum maintenance power.

[0013] Furthermore, the specific implementation of dynamic power shiftback includes: The core management unit sends a power return command to the unlocked sub-core. After receiving the command, the sub-core reduces its output power to the minimum maintenance power at a fixed slope. At the same time, it feeds back the excess power on the load side to the core's fast power replenishment channel through the reverse DC bus inside the sub-core, forming a closed-loop energy reuse. After the return is completed, the core management unit re-evaluates the core's real-time power replenishment margin.

[0014] The dual-core fusion power supply's sub-core load adaptation and parent core power replenishment linkage system includes: Data acquisition module: The main core management unit collects the current remaining capacity of all connected sub-cores, sub-core type identifiers, and real-time voltage ripple coefficients at the sub-core output terminals in real time. Combined with the current state of charge of the management unit and the real-time available output capacity of the main core converter, the real-time replenishment margin of the main core is calculated. Health assessment module: Performs continuous closed-loop insulation tracking detection on each connected load. The main core management unit sends alternating low-voltage detection pulse sequences to the sub-core. The sub-core injects the detection pulse sequence into the load circuit and simultaneously collects the returned damping attenuation waveform and instantaneous leakage current value to obtain the real-time insulation health of the load. Tag generation module: Determines the dynamic admission threshold of the load based on the real-time insulation health of the load and the sub-core type identifier, compares the current real-time power of the load with the dynamic admission threshold, and generates a load continuous adaptation tag and a sub-core lock identifier; Rule-making module: The parent core management unit establishes a priority power replenishment sequence for sub-cores based on the load continuously adapting tags and sub-core locking identifiers of all sub-cores; Power replenishment module: The mother core management unit starts the fast power replenishment channel for the sub-cores that meet the preset power replenishment trigger conditions in sequence according to the sub-core priority power replenishment sequence and the mother core real-time power replenishment margin. At the same time, it performs dynamic power back-off for the unlocked sub-cores until the mother core real-time power replenishment margin is restored to the safety threshold or above.

[0015] The technical effects and advantages of the dual-core fusion power supply's daughter core load adaptation and mother core power replenishment linkage system and method of the present invention are as follows: This invention obtains the real-time insulation health of the load by sending alternating low-voltage probe pulse sequences to the subcore and simultaneously acquiring the returned damping attenuation waveform and instantaneous leakage current value. This achieves continuous closed-loop tracking and detection of the load insulation status, solving the technical problem of existing technologies that rely solely on manual visual inspection or single insulation tests for static judgment, and cannot track changes in load-side insulation impedance and leakage current anomalies in real time during continuous power supply. Based on the real-time insulation health of the load and the subcore type identifier, an admission threshold is dynamically determined. Through sliding comparisons at three different time scales (instantaneous, short-cycle, and long-cycle), a continuous load adaptation label and a subcore locking identifier are generated. This transforms load adaptability from static single-test detection to dynamic continuous evaluation, enabling timely identification of insulation degradation trends, abnormal power ramp-up, and continuous overload on the load side. Risk mitigation: Based on adaptation tags and locking identifiers, a priority replenishment sequence for sub-cores is established according to both remaining capacity and insulation health. When the immediate replenishment margin of the main core is lower than the preset warning value, the access conditions are automatically tightened, realizing intelligent scheduling and hierarchical priority management of energy resources. This ensures that critical loads and locked sub-cores can still receive priority replenishment guarantees when resources are scarce. According to the priority replenishment sequence, a fast replenishment channel is activated for sub-cores that meet the replenishment trigger conditions. At the same time, dynamic power backhaul is performed on unlocked sub-cores, feeding back excess power on the load side to the main core through the reverse DC bus to form a closed-loop energy reuse. This takes into account the coordinated configuration requirements of lightweight sub-core portability and continuous power supply of the main core, effectively solving the inherent contradiction between portability and large capacity, and improving the energy utilization efficiency and power supply reliability of the dual-core fused power system under complex operating conditions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the sub-core load adaptation and parent core energy replenishment linkage method of the dual-core fusion power supply of the present invention. Figure 2 This is a schematic diagram of the sub-core load adaptation and parent core power replenishment linkage system of the dual-core fusion power supply of the present invention; Figure 3 This is a schematic diagram of the dual-core fusion power supply of the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1:

[0018] Please see Figure 1 As shown, the sub-core load adaptation and parent core power replenishment linkage method of the dual-core fused power supply in this embodiment includes: Step S1: The core management unit collects the current remaining capacity, sub-core type identifier, and real-time voltage ripple coefficient of all connected sub-cores in real time. Based on the current state of charge of the core management unit and the real-time available output capacity of the core converter, the instantaneous power replenishment margin of the core is calculated.

[0019] The dual-core fusion power supply consists of a main core unit and multiple sub-core units. The main core unit acts as the primary energy storage hub, undertaking the function of large-capacity energy storage and distribution. The sub-core units, as detachable portable power supply modules, directly power the load devices. The main core management unit is the core controller of the main core unit, establishing data links with all connected sub-cores via a communication bus.

[0020] In construction sites, the operating status of load equipment dynamically deteriorates due to factors such as continuous operation duration, changes in ambient temperature and humidity, and mechanical wear. If only a single static test is performed before power supply, it is impossible to track and test changes in insulation impedance, abnormal leakage current, and power consumption characteristic drift on the load side in real time during continuous power supply, which can easily lead to safety hazards. Therefore, this solution uses a master core management unit to collect the real-time status of all sub-cores, providing a data foundation for subsequent continuous closed-loop insulation tracking and monitoring, and coordinated power replenishment control.

[0021] The main core management unit polls the status of each connected sub-core at a fixed sampling period of 100 milliseconds. This period balances data real-time performance with communication bandwidth usage. The data collected in each poll includes: the current remaining capacity reported by the sub-core battery management system, in ampere-hours; the type identification code written to the sub-core at the factory to distinguish sub-core models with different power levels and interface specifications; and the real-time voltage ripple coefficient at the sub-core output, which is obtained by performing Fourier analysis on the output voltage through the sub-core's internal high-speed sampling circuit, reflecting the stability of the output voltage.

[0022] In this embodiment, sub-core types are categorized into three types: Type A sub-cores are lightweight and portable, with a rated output power of 500 watts, suitable for small power tools; Type B sub-cores are standard operating type, with a rated output power of 1500 watts, suitable for medium-sized power tools; and Type C sub-cores are heavy-duty construction type, with a rated output power of 3000 watts, suitable for large power tools. Different types of sub-cores have different baseline parameters in subsequent load adaptation testing and power replenishment priority ranking.

[0023] The methods for obtaining the immediate replenishment margin of the main core include: converting the current state of charge of the main core energy storage system into usable energy, deducting the minimum reserved capacity of the main core converter to maintain itself and switch off-grid, and then subtracting the sum of the minimum maintenance power declared by all locked sub-cores in the most recent control cycle. The result is used as the immediate replenishment margin of the main core.

[0024] In one specific implementation of this invention, the instantaneous energy replenishment margin of the mother core is expressed by the formula: In the formula, The immediate energy replenishment margin for the parent core, expressed in watt-hours; This represents the current state of charge of the parent core energy storage system, with a value ranging from 0 to 1. The rated capacity of the parent core energy storage system is 23 kWh in this embodiment; The minimum reserved capacity for the main core converter to maintain itself and switch off-grid is set to 100 watt-hours in this embodiment; This represents the number of currently locked sub-cores. For the first The minimum sustaining power declared for each locked subcore, in watts.

[0025] It should be noted that the minimum reserve capacity setting of 100 Wh is based on the energy reserve required for the core converter to complete a full grid-to-off-grid switch under extreme operating conditions. This value was obtained through experimental measurement. The control cycle is set to 1 second. At the beginning of each control cycle, the core management unit recalculates the core's instantaneous replenishment margin.

[0026] Step S2: Perform continuous closed-loop insulation tracking detection on each connected load. The main core management unit sends an alternating low-voltage detection pulse sequence to the sub-core. The sub-core injects the detection pulse sequence into the load circuit and simultaneously collects the returned damping attenuation waveform and instantaneous leakage current value to obtain the real-time insulation health of the load.

[0027] Existing technologies only perform load adaptability testing as a static pre-process before power supply, relying on manual visual inspection or a single insulation test for judgment. This approach cannot track changes in insulation impedance on the load side in real time during continuous power supply. This new method achieves continuous closed-loop monitoring of the load insulation status by superimposing a low-amplitude detection signal during normal power supply, thus solving the technical problem of traditional methods' inability to track insulation degradation in real time.

[0028] The method by which the parent core management unit sends alternating low-voltage probe pulse sequences to the sub-cores includes: the parent core management unit dynamically selects the pulse amplitude and duty cycle according to the sub-core type identifier, and performs an instantaneous evaluation of the ripple coefficient of the sub-core output voltage before each injection. When the ripple coefficient exceeds the ripple tolerance band corresponding to the sub-core type, the probe pulse amplitude is automatically reduced until the ripple coefficient falls back into the tolerance band.

[0029] Different types of subcores have different ripple tolerance bands: the ripple tolerance band for type A subcores is 0 to 5%, for type B subcores it is 0 to 3%, and for type C subcores it is 0 to 2%. The ripple tolerance band is set based on the sensitivity of the load driven by each type of subcore to voltage stability. Heavy-duty construction loads are usually precision electrical equipment, which are more sensitive to voltage ripple.

[0030] The probe pulse sequence consists of alternating positive and negative pulses, with a pulse width of 10 microseconds and a pulse interval of 100 microseconds. For Class A subcores, the initial pulse amplitude is set to 5 volts with a duty cycle of 10%; for Class B subcores, the initial pulse amplitude is set to 8 volts with a duty cycle of 8%; and for Class C subcores, the initial pulse amplitude is set to 12 volts with a duty cycle of 5%. When the ripple coefficient exceeds the tolerance band, the pulse amplitude is gradually reduced in 10% increments until the ripple coefficient falls back into the tolerance band or the pulse amplitude drops to the minimum limit of 2 volts.

[0031] After the subcore injects a probe pulse sequence into the load circuit, it synchronously acquires two types of signals at a sampling rate of 1 MHz through a high-speed sampling circuit: one is the return waveform of the probe pulse after attenuation through the load impedance network, which is called the damped attenuation waveform; the other is the instantaneous value of the leakage current acquired through the grounding circuit.

[0032] The method for obtaining the real-time insulation health of the load includes: extracting the envelope of the returned damping attenuation waveform and calculating the attenuation time constant; using the ratio of the instantaneous leakage current value to the amplitude of the detection pulse as the instantaneous leakage admittance, the larger the instantaneous leakage admittance, the worse the insulation performance of the load; and mapping the weighted fusion of the attenuation time constant and the instantaneous leakage admittance to a preset health scale to obtain the real-time insulation health of the load, and immediately marking it as a rapid deterioration state when the real-time insulation health of the load is lower than D percent of the historical average for three consecutive times (the value range is 75 to 85, and it is set to 80 in this embodiment).

[0033] The envelope of the damped decay waveform was extracted using the Hilbert transform method, and the extracted envelope exhibited an exponential decay pattern. The decay time constant... The envelope was obtained by exponential fitting, and the fitting model was as follows: ;in The initial amplitude, For time. The larger the decay time constant, the higher the insulation resistance of the load and the better the insulation performance.

[0034] real-time insulation health of load Expressed as a formula: In the formula, For reference decay time constants, the values ​​are set according to sub-core type: 50 microseconds for type A sub-cores, 80 microseconds for type B sub-cores, and 120 microseconds for type C sub-cores. For instantaneous leakage admittance; For reference leakage admittance, it is uniformly set to 0.01 millisieverts; The weighting factor is 0.6. This value is based on experimental calibration, which determines that the influence of the decay time constant on insulation health has a slightly greater weight than the leakage admittance. To prevent extremely small constants with a denominator of zero, the value is set to 0.001.

[0035] The calculated Values ​​mapped to a health scale: when When the value is greater than or equal to 1.2, the health level is excellent; when... A health rating between 0.8 and 1.2 indicates a good health level; when... When the score is between 0.5 and 0.8, the health level is average; when... When the value is less than 0.5, the health level is considered deteriorated.

[0036] The main core management unit maintains the historical insulation health record of the loads connected to each sub-core, recording the most recent 100 test results and calculating the historical average. When the real-time insulation health of a load is below 80% of the historical average for three consecutive times, it indicates that the load's insulation performance is rapidly deteriorating, and the load is immediately marked as being in a rapidly deteriorating state. Normal insulation performance fluctuations are typically within ±10% of the historical average; three consecutive times below 80% indicates a sustained deterioration trend rather than random fluctuations.

[0037] Step S3: Determine the dynamic access threshold of the load based on the real-time insulation health of the load and the sub-core type identifier, compare the current real-time power of the load with the dynamic access threshold, and generate a load continuous adaptation tag and a sub-core lock identifier.

[0038] Dynamic admission threshold is a power boundary value that is dynamically adjusted based on the current insulation status of the load. It is used to determine whether the load is suitable to continue to be powered by the current subcore. Unlike traditional fixed power thresholds, dynamic admission threshold can adaptively adjust according to real-time changes in the load's insulation health. It allows higher power output when the insulation performance is good and actively tightens the power limit when the insulation performance deteriorates, thereby improving power supply safety.

[0039] The dynamic access threshold is determined by: selecting the corresponding basic access power based on the sub-core type identifier; dynamically adjusting the basic access power to obtain the dynamic access threshold: when the real-time insulation health of the load is higher than the first health threshold, a positive compensation amplitude is added to the basic access power; when the real-time insulation health of the load is between the first health threshold and the second health threshold, the basic access power remains unchanged; when the real-time insulation health of the load is lower than the second health threshold or is marked as a rapid deterioration state, the basic access power is reduced proportionally until the minimum safe power is reached.

[0040] The basic access power settings for each type of subcore are as follows: The basic access power for Class A subcores is 450 watts, which is 90% of the rated power, with a 10% safety margin; the basic access power for Class B subcores is 1350 watts, which is also 90% of the rated power; and the basic access power for Class C subcores is 2700 watts.

[0041] The first health threshold is set to 1.0, and the second health threshold is set to 0.6. When the real-time load insulation health is greater than 1.0, it indicates that the load insulation performance is better than the reference level, and a positive compensation can be added. The compensation amount is 10% of the base admission power, but the dynamic admission threshold must not exceed the subcore rated power. When the real-time load insulation health is between 0.6 and 1.0, the insulation performance is within an acceptable range, and the base admission power remains unchanged. When the real-time load insulation health is below 0.6 or is marked as rapidly deteriorating, the base admission power is reduced according to the following formula: In the formula, This is a dynamic admission threshold; Basic access power; This is the second health threshold. The reduced dynamic admission threshold must not be lower than the minimum safe power, and the minimum safe power for each type of subcore is as follows: Class A 100 watts, Class B 300 watts, and Class C 600 watts.

[0042] The current real-time load power is compared with the dynamic threshold to generate a load continuous adaptation tag and a sub-core lock flag. Specifically, the parent core management unit performs three sliding comparisons of the current real-time load power with the dynamic threshold at different time scales within each control cycle, obtaining instantaneous comparison results, short-cycle average comparison results, and long-cycle trend comparison results. The comparisons at these three time scales can distinguish between different types of abnormal operating conditions such as transient impacts, continuous overloads, and gradual power ramp-ups.

[0043] When the instantaneous comparison result shows that the current load real-time power exceeds the dynamic threshold by E percent twice consecutively, an instantaneous overload warning tag is immediately generated for that subcore. The condition of two consecutive occurrences can effectively filter out single sampling noise or surge current at the moment of load start-up. The value of E ranges from 101 to 105. In this embodiment, the value of E is set to 105, based on the premise that 1% to 5% of the transient power exceeds the limit without triggering a warning. When the short-cycle average comparison results show that the average load power over the most recent ten control cycles exceeds the dynamic threshold by 1 / F (ranging from 101 to 105, and 102 in this embodiment) and is accompanied by a monotonically decreasing real-time insulation health of the load, a continuous overload risk label is added to the subcore. The ten control cycles correspond to a 10-second observation window, which is sufficient to identify continuous overloads rather than transient fluctuations; the requirement of a simultaneous monotonically decreasing insulation health is to confirm that the overload has indeed led to a continuous deterioration in insulation performance.

[0044] When the long-term trend comparison results show that the load power exhibits a monotonically increasing trend within the most recent minute, and the rate of increase exceeds N times (ranging from 1 to 2, set to 1.2 in this embodiment) of the slope threshold corresponding to the sub-core type, an abnormal power ramp-up label is added to that sub-core. The slope thresholds for each type of sub-core are: 10 watts / second for Type A, 30 watts / second for Type B, and 60 watts / second for Type C. The slope thresholds are set based on the maximum power change rate of each type of load under normal operating conditions; exceeding 1.2 times indicates an abnormal power ramp-up trend.

[0045] The parent core management unit logically superimposes instantaneous overload warning tags, continuous overload risk tags, and power ramp-up anomaly tags. Any subcore with any two or more tags is marked as having continuous load adaptation failure, and a subcore lock flag is generated simultaneously. For subcores with only one tag, a continuous load adaptation degradation tag is generated, and the parent core management unit forcibly shifts its priority replenishment sequence position down three places during subsequent replenishment. For subcores without any tags, a continuous load adaptation optimization tag is generated, and its priority replenishment sequence position remains unchanged.

[0046] The purpose of the sub-core lockout flag is to isolate the sub-core from normal power supply scheduling and put it into a protective power supply mode. The locked sub-core maintains only the minimum power output to prevent sudden power failure of the load, while waiting for manual intervention or automatic disconnection of the load.

[0047] Step S4: The mother core management unit establishes a priority power replenishment sequence for sub-cores based on the load continuous adaptation tags and sub-core lock identifiers of all sub-cores, and immediately tightens the access conditions of the priority power replenishment sequence for sub-cores when the real-time power replenishment margin of the mother core is lower than the preset warning value.

[0048] In multi-core parallel power supply scenarios, the remaining capacity consumption rate of each sub-core is different, requiring the parent core to perform differentiated power replenishment scheduling for the sub-cores. Traditional fixed priority scheduling cannot adapt to complex operating conditions such as dynamic load changes and insulation degradation. This step establishes a dynamic priority power replenishment sequence to achieve intelligent power replenishment scheduling based on load adaptation status.

[0049] The method for establishing the sub-core priority replenishment sequence includes: sorting all sub-cores that generate load continuous adaptation tags in order of remaining capacity from low to high; if the remaining capacity is the same, further sorting them in order of real-time load insulation health from high to low; and forcibly inserting a sub-core with a sub-core locking flag at the beginning of the sequence.

[0050] The principle of prioritizing remaining capacity ensures that sub-cores whose capacity is about to be depleted can receive replenishment first, avoiding sudden power outages due to capacity exhaustion. When remaining capacity is the same, insulation health is used as a secondary priority because loads with higher insulation health have a greater safety margin in their power demand, and their power supply continuity should be guaranteed first.

[0051] Sub-cores marked with a sub-core lock indicator are forcibly inserted at the beginning of the sequence to ensure that these sub-cores in protective power supply mode can maintain a minimum power supply. Although the locked sub-cores no longer output normal power, they still require a small amount of energy to maintain the operation of their control and protection circuits.

[0052] The preset warning value is set at 20% of the rated capacity of the parent core, i.e., 2000 watt-hours. When the immediate energy replenishment margin of the parent core is less than 2000 watt-hours, it indicates that the energy reserves of the parent core itself are under strain, and at this time the access conditions for the priority energy replenishment sequence of daughter cores are immediately tightened.

[0053] The specific measures to tighten the access conditions include: temporarily removing sub-cores with the load continuous adaptation degradation label from the priority replenishment sequence, and only retaining sub-cores with the load continuous adaptation preferred label and sub-cores with the sub-core lock flag; reducing the replenishment power limit of all sub-cores in the sequence to 60% of the normal value; and lowering the capacity threshold in the replenishment triggering condition from 25% to 15%, that is, replenishment will only be triggered when the remaining capacity of a sub-core is less than 15% of its maximum capacity.

[0054] Step S5: The mother core management unit starts the fast power replenishment channel for the sub-cores that meet the preset power replenishment trigger conditions in sequence according to the sub-core priority power replenishment sequence and the mother core real-time power replenishment margin. At the same time, it performs dynamic power back-switch for the unlocked sub-cores until the mother core real-time power replenishment margin is restored to the safety threshold or above.

[0055] The rapid power replenishment channel is a high-power energy transfer channel between the main core and the daughter core, capable of rapidly charging the daughter core using the maximum allowable current of the main core converter. Through reasonable power replenishment scheduling and power shift-back strategies, efficient utilization of the main core's energy can be achieved while ensuring power supply to critical loads.

[0056] Divide the immediate energy replenishment margin of the mother core by the maximum energy replenishment requirement of the daughter core that ranks first in the current priority energy replenishment sequence to obtain the margin coverage ratio.

[0057] The power replenishment trigger conditions are set, including a margin coverage ratio threshold and a capacity threshold: when the margin coverage ratio is greater than 1.2 and the remaining capacity of the sub-core is less than 25% of its maximum capacity, the fast power replenishment channel is activated and the sub-core is replenished with the maximum allowable current of the parent core converter. In this embodiment, the margin coverage ratio threshold is set to 1.2 to ensure that the parent core still has 20% energy reserve to cope with emergencies after completing the current sub-core power replenishment; the capacity threshold of 25% is set based on the fact that the output voltage stability of various sub-cores begins to decline significantly when the remaining capacity is less than 25%.

[0058] The maximum allowable current of the main core converter is set according to the type of sub-core: 20 amps for type A sub-core, corresponding to 1000 watts of supplementary power; 30 amps for type B sub-core, corresponding to 1500 watts of supplementary power; and 50 amps for type C sub-core, corresponding to 2500 watts of supplementary power.

[0059] While rapidly replenishing the first-ranked daughter core, dynamic power backshifting is performed on the unlocked daughter cores in the sequence that have not yet been activated, gradually reducing their current output power to the minimum sustaining power. The purpose of dynamic power backshifting is to release the parent core energy currently consumed by the unlocked daughter cores and transfer this energy to the rapid replenishment channel, thereby improving replenishment efficiency.

[0060] The specific execution of dynamic power reset includes: the core management unit sends a power reset command to the unlocked sub-cores. After receiving the command, the sub-core reduces the output power to the minimum maintenance power at a fixed slope. At the same time, the excess power on the load side is fed back to the core's fast power replenishment channel through the internal reverse DC bus of the sub-core, forming a closed-loop energy reuse. After the reset is completed, the core management unit re-evaluates the core's real-time power replenishment margin.

[0061] The power transition slope is set to a fixed 100 watts / second. This slope is slow enough to avoid power surges to the load, yet fast enough to complete the power transition within a reasonable time. For example, for a Class B subcore, it takes 12 seconds to transition from the rated power of 1500 watts to the minimum sustaining power of 300 watts.

[0062] The internal reverse DC bus of the sub-core serves as a bidirectional power flow channel in the sub-core power electronic topology. When the sub-core receives a power shift-back command, its internal bidirectional DC-DC converter switches to reverse operating mode, transferring excess power from the load side back to the core's fast power replenishment channel. The power efficiency of the reverse transfer is approximately 95%, with energy loss primarily stemming from the switching and conduction losses of the bidirectional converter.

[0063] The closed-loop energy reuse mechanism enables dynamic power transfer not only to release the energy occupied by the mother core by the daughter core, but also to recover and reuse some of the energy that has been output to the load side. For example, when a Class B daughter core transfers back from 1350 watts to 300 watts, about 1000 watts of the released 1050 watts of power are fed back to the fast power replenishment channel through the reverse DC bus, effectively improving the overall energy utilization efficiency.

[0064] After power migration is complete, the core management unit recalculates the core's immediate power margin. If the core's immediate power margin recovers to or above the safety threshold, the power migration restriction on unlocked daughter cores is lifted, allowing them to resume normal power output. If the core's immediate power margin remains below the safety threshold, the power migration state continues until the core's immediate power margin recovers. The safety threshold is set at 30% of the core's rated capacity.

[0065] It should be noted that, in other embodiments, the margin coverage ratio threshold in the power replenishment trigger condition can be adjusted according to the actual application scenario. For scenarios with extremely high requirements for power supply continuity, it can be appropriately reduced to 1.1, while for scenarios that allow for a certain degree of power supply interruption, it can be appropriately increased to 1.5. Similarly, the capacity threshold can also be adjusted according to the characteristics of the sub-core battery. For lithium iron phosphate batteries, it can be reduced to 20%, while for ternary lithium batteries, it can be increased to 30%.

[0066] This invention achieves deep linkage between sub-core load adaptation and parent core power replenishment through continuous closed-loop insulation tracking and detection, dynamic access threshold adjustment, intelligent priority power replenishment sequence establishment, and closed-loop energy reuse. Compared with existing technologies, this solution can track changes in insulation impedance, abnormal leakage current, and power consumption characteristic drift on the load side in real time during continuous power supply, effectively solving the technical problem that traditional static detection cannot identify dynamic degradation. At the same time, the dual-core fusion architecture takes into account both portability and large capacity, avoiding the problems of limited capacity of small portable power supplies and inconvenient transportation of high-power energy storage power supplies, and providing reliable technical support for power supply of power tools under complex working conditions. Example 2:

[0067] Please see Figure 2 As shown, parts not described in detail in this embodiment are described in Embodiment 1. A dual-core fusion power supply sub-core load adaptation and parent core power replenishment linkage system is provided, including: Data acquisition module: The main core management unit collects the current remaining capacity of all connected sub-cores, sub-core type identifiers, and real-time voltage ripple coefficients at the sub-core output terminals in real time. Combined with the current state of charge of the management unit and the real-time available output capacity of the main core converter, the real-time replenishment margin of the main core is calculated. Health assessment module: Performs continuous closed-loop insulation tracking detection on each connected load. The main core management unit sends alternating low-voltage detection pulse sequences to the sub-core. The sub-core injects the detection pulse sequence into the load circuit and simultaneously collects the returned damping attenuation waveform and instantaneous leakage current value to obtain the real-time insulation health of the load. Tag generation module: Determines the dynamic admission threshold of the load based on the real-time insulation health of the load and the sub-core type identifier, compares the current real-time power of the load with the dynamic admission threshold, and generates a load continuous adaptation tag and a sub-core lock identifier; Rule-making module: The parent core management unit establishes a priority power replenishment sequence for sub-cores based on the load continuously adapting tags and sub-core locking identifiers of all sub-cores; Power replenishment module: The mother core management unit starts the fast power replenishment channel for the sub-cores that meet the preset power replenishment trigger conditions in sequence according to the sub-core priority power replenishment sequence and the mother core real-time power replenishment margin. At the same time, it performs dynamic power back-off for the unlocked sub-cores until the mother core real-time power replenishment margin is restored to the safety threshold or above.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for coordinating sub-core load adaptation and parent core power replenishment in a dual-core fusion power supply, characterized in that, include: Step S1: The core management unit collects the current remaining capacity, sub-core type identifier, and real-time voltage ripple coefficient of all connected sub-cores in real time. Based on the current state of charge of the core management unit and the real-time available output capacity of the core converter, the instantaneous power replenishment margin of the core is calculated. Step S2: Perform continuous closed-loop insulation tracking detection on each connected load. The main core management unit sends an alternating low-voltage detection pulse sequence to the sub-core. The sub-core injects the detection pulse sequence into the load circuit and simultaneously collects the returned damping attenuation waveform and instantaneous leakage current value to obtain the real-time insulation health of the load. Step S3: Determine the dynamic access threshold of the load based on the real-time insulation health of the load and the sub-core type identifier, compare the current real-time power of the load with the dynamic access threshold, and generate a load continuous adaptation tag and a sub-core lock identifier. Step S4: The mother core management unit establishes a priority power replenishment sequence for sub-cores based on the load continuously adapting tags and sub-core locking identifiers of all sub-cores, and immediately tightens the admission conditions of the priority power replenishment sequence for sub-cores when the real-time power replenishment margin of the mother core is lower than the preset warning value. Step S5: The mother core management unit starts the fast power replenishment channel for the sub-cores that meet the preset power replenishment trigger conditions in sequence according to the sub-core priority power replenishment sequence and the mother core real-time power replenishment margin. At the same time, it performs dynamic power back-switch for the unlocked sub-cores until the mother core real-time power replenishment margin is restored to the safety threshold or above.

2. The method for daughter core load adaptation and mother core power replenishment linkage of a dual-core fusion power supply according to claim 1, characterized in that, The methods for obtaining immediate energy replenishment margin in the parent core include: The current state of charge of the parent core energy storage system is converted into usable energy. The minimum reserve capacity of the parent core converter to maintain itself and switch off-grid is deducted, and the sum of the minimum maintenance power declared by all locked sub-cores in the most recent control cycle is subtracted. The result is used as the immediate energy replenishment margin of the parent core.

3. The method for daughter core load adaptation and mother core power replenishment linkage of a dual-core fusion power supply according to claim 2, characterized in that, The methods by which the parent core management unit sends alternating low-voltage probe pulse sequences to the daughter core include: The parent core management unit dynamically selects the pulse amplitude and duty cycle according to the sub-core type identifier. Before each injection, it performs an instantaneous evaluation of the ripple coefficient of the sub-core output voltage. When the ripple coefficient exceeds the ripple tolerance band corresponding to the sub-core type, it automatically reduces the detection pulse amplitude until the ripple coefficient falls back into the tolerance band.

4. The method for daughter core load adaptation and mother core power replenishment linkage of a dual-core fusion power supply according to claim 3, characterized in that, Methods for obtaining real-time insulation health of loads include: The envelope of the returned damping attenuation waveform is extracted and the attenuation time constant is calculated. The ratio of the instantaneous value of the leakage current to the amplitude of the detection pulse is used as the instantaneous leakage admittance. The attenuation time constant and the instantaneous leakage admittance are weighted and fused and mapped to the preset health scale to obtain the real-time insulation health of the load. When the real-time insulation health of the load is lower than D percent of the historical average for three consecutive times, it is immediately marked as a rapid deterioration state.

5. The method for daughter core load adaptation and mother core power replenishment linkage of a dual-core fusion power supply according to claim 4, characterized in that, The methods for determining dynamic admission thresholds include: Select the corresponding basic access power based on the sub-core type identifier; dynamically adjust the basic access power to obtain the dynamic access threshold: when the real-time insulation health of the load is higher than the first health threshold, add a positive compensation amplitude to the basic access power; when the real-time insulation health of the load is between the first health threshold and the second health threshold, keep the basic access power unchanged; when the real-time insulation health of the load is lower than the second health threshold or is marked as a rapid deterioration state, reduce the basic access power proportionally until the minimum safe power.

6. The method for daughter core load adaptation and mother core power replenishment linkage of a dual-core fusion power supply according to claim 5, characterized in that, The methods for comparing the current real-time load power with the dynamic admission threshold to generate load continuous adaptation tags and sub-core lock flags include: The core management unit performs three sliding comparisons of the current load real-time power with the dynamic admission threshold at different time scales in each control cycle, and obtains instantaneous comparison results, short-cycle average comparison results and long-cycle trend comparison results respectively. When the instantaneous comparison result shows that the current load real-time power exceeds the dynamic access threshold by E percent twice in a row, an instantaneous overload warning label is immediately generated for the sub-core. When the short-cycle average comparison results show that the average load power of the most recent ten control cycles exceeds F percent of the dynamic admission threshold and is accompanied by a monotonically decreasing real-time insulation health of the load, a continuous overload risk label is attached to the subcore. When the long-term trend comparison results show that the load power is monotonically increasing in the most recent minute and the rate of increase exceeds N times the slope threshold corresponding to the sub-core type, an abnormal power ramp label is added to the sub-core. The parent core management unit logically superimposes instantaneous overload warning tags, continuous overload risk tags, and power ramp-up anomaly tags. Any subcore with any two or more tags is marked as having continuous load adaptation failure, and a subcore lock flag is generated simultaneously. For subcores with only one tag, a continuous load adaptation degradation tag is generated, and the parent core management unit forcibly shifts its priority replenishment sequence position down three places during subsequent replenishment. For subcores without any tags, a continuous load adaptation optimization tag is generated, and its priority replenishment sequence position remains unchanged.

7. The method for daughter core load adaptation and mother core power replenishment linkage of a dual-core fusion power supply according to claim 6, characterized in that, Methods for establishing a daughter nucleus preferential energy replenishment sequence include: All sub-cores that generate continuous load adaptation tags are sorted from low to high based on their remaining capacity. If the remaining capacity is the same, they are further sorted from high to low based on the real-time insulation health of the load, and a sub-core with a sub-core locking flag is forcibly inserted at the beginning of the sequence.

8. The method for daughter core load adaptation and mother core power replenishment linkage of a dual-core fusion power supply according to claim 7, characterized in that, Step S5 includes: Divide the immediate energy replenishment margin of the mother core by the maximum energy replenishment requirement of the daughter core that ranks first in the current priority energy replenishment sequence to obtain the margin coverage ratio. Set the power replenishment trigger conditions, which include the margin coverage ratio threshold and the capacity threshold. When the margin coverage ratio is greater than the margin coverage ratio threshold and the remaining capacity of the sub-core is lower than the capacity threshold, the fast power replenishment channel is opened and the sub-core is powered by the maximum allowable current of the mother core converter. At the same time, dynamic power back-shifting is performed on the unlocked sub-cores in the sequence that have not yet been reached, gradually reducing their current output power to the minimum maintenance power.

9. The method for daughter core load adaptation and mother core power replenishment linkage of a dual-core fusion power supply according to claim 8, characterized in that, The specific implementation of dynamic power shiftback includes: The core management unit sends a power return command to the unlocked sub-core. After receiving the command, the sub-core reduces its output power to the minimum maintenance power at a fixed slope. At the same time, it feeds back the excess power on the load side to the core's fast power replenishment channel through the reverse DC bus inside the sub-core, forming a closed-loop energy reuse. After the return is completed, the core management unit re-evaluates the core's real-time power replenishment margin.

10. A sub-core load adaptation and parent core power replenishment linkage system for a dual-core fusion power supply, used to implement the sub-core load adaptation and parent core power replenishment linkage method of any one of claims 1 to 9, characterized in that, include: Data acquisition module: The main core management unit collects the current remaining capacity of all connected sub-cores, sub-core type identifiers, and real-time voltage ripple coefficients at the sub-core output terminals in real time. Combined with the current state of charge of the management unit and the real-time available output capacity of the main core converter, the real-time replenishment margin of the main core is calculated. Health assessment module: Performs continuous closed-loop insulation tracking detection on each connected load. The main core management unit sends alternating low-voltage detection pulse sequences to the sub-core. The sub-core injects the detection pulse sequence into the load circuit and simultaneously collects the returned damping attenuation waveform and instantaneous leakage current value to obtain the real-time insulation health of the load. Tag generation module: Determines the dynamic admission threshold of the load based on the real-time insulation health of the load and the sub-core type identifier, compares the current real-time power of the load with the dynamic admission threshold, and generates a load continuous adaptation tag and a sub-core lock identifier; Rule-making module: The parent core management unit establishes a priority power replenishment sequence for sub-cores based on the load continuously adapting tags and sub-core locking identifiers of all sub-cores; Power replenishment module: The mother core management unit starts the fast power replenishment channel for the sub-cores that meet the preset power replenishment trigger conditions in sequence according to the sub-core priority power replenishment sequence and the mother core real-time power replenishment margin. At the same time, it performs dynamic power back-off for the unlocked sub-cores until the mother core real-time power replenishment margin is restored to the safety threshold or above.

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