Output power control method and equipment of household energy storage system and medium

Abstract

The embodiment of the invention discloses an output power control method and device for a household energy storage system and a medium, and the method comprises the steps: obtaining the real-time cell parameters of each parallel cell according to a sensor corresponding to each parallel cell in the household energy storage system; wherein the real-time battery cell parameters at least comprise voltage, current and temperature; based on the real-time battery cell parameters and the charging and discharging historical data of each parallel battery cell, determining the working characteristics of each parallel battery cell; if the power output at the next moment is predicted to be greater than the preset power based on the real-time state and the current power demand of the household energy storage system, determining the to-be-borne output power corresponding to each parallel battery cell based on the working characteristics of each parallel battery cell; and comparing the to-be-borne output power with the actual output power to obtain a deviation value, and adjusting the conduction degree of each parallel battery cell according to a preset PID control algorithm and the deviation value to realize dynamic adjustment of the output power.

Description

Technical Field

[0001] This specification relates to the technical field of energy storage systems, and in particular to an output power control method, device, and medium for a household energy storage system. Background Art

[0002] Household energy storage systems typically use a parallel cell topology, which offers advantages such as low cost and good scalability. This structure can meet the needs of daily household electricity consumption and cope with scenarios such as sudden power outages. However, in high-power output scenarios, such as when a household uses multiple high-power electrical devices simultaneously, household energy storage systems with a parallel cell topology face many challenges. On the one hand, due to factors such as production processes and usage time, different battery cells have inconsistent parameters such as capacity and internal resistance. At high power output, this leads to uneven current distribution among the battery cells. Some battery cells may age faster or even be damaged due to overcurrent, seriously affecting the overall performance and service life of the energy storage system. On the other hand, traditional control methods have difficulty responding quickly and accurately to high-power output and adjusting output power. This makes it difficult to cause large output voltage fluctuations and unstable power output, making it impossible to provide a stable and reliable power supply for household electrical appliances. Therefore, output power control for household energy storage systems is an important technology for stabilizing power supply.

[0003] Traditionally, there are two methods for controlling the output power of household energy storage systems: one is based on average current control, which detects the total output current and distributes it evenly to each parallel battery cell branch. However, this method cannot compensate for differences in battery cell parameters in real time, and the current distribution accuracy is low when the load changes dynamically. The second method is to adopt a voltage balancing control strategy to achieve current balancing by adjusting the voltage across each battery cell. However, this method has a slow response speed and is difficult to effectively suppress voltage fluctuations during high-power instantaneous output, and cannot meet the requirements of household high-power electrical equipment for stable power supply. The control method based on simple logical switches can only realize the basic charging and discharging functions of the energy storage system, lacks refined control during high-power output, and cannot guarantee the reliable operation of the system in complex power usage scenarios. Summary of the Invention

[0004] In order to solve the above technical problems, one or more embodiments of this specification provide an output power control method, device, and medium for a household energy storage system.

[0005] One or more embodiments of this specification adopt the following technical solutions: One or more embodiments of this specification provide a method for controlling output power of a household energy storage system, the method comprising: According to the sensors corresponding to the parallel cells in the household energy storage system, real-time cell parameters of the parallel cells are obtained; wherein the real-time cell parameters include at least: voltage, current and temperature; Determining the operating characteristics of each of the parallel cells based on the real-time cell parameters and the charge and discharge history data of each of the parallel cells; If, based on the real-time status of the household energy storage system and the current power demand, it is predicted that the power output at the next moment is greater than the preset power, the output power to be assumed by each parallel battery cell is determined based on the operating characteristics of each parallel battery cell; The output power to be assumed is compared with the actual output power to obtain a deviation value, so as to adjust the conductivity of each parallel battery cell according to a preset PID control algorithm and the deviation value to achieve dynamic adjustment of the output power.

[0006] Optionally, in one or more embodiments of this specification, before obtaining the real-time cell parameters of each parallel cell in the household energy storage system according to the sensor corresponding to each parallel cell, the method further includes: Initializing and configuring the sensors corresponding to the parallel-connected cells in the household energy storage system to enable data acquisition functions of the sensors; A communication link between the sensor and the household energy storage system is obtained, so as to establish a communication connection between the sensor and the household energy storage system based on the communication link and a preset communication protocol.

[0007] Optionally, in one or more embodiments of this specification, after obtaining the real-time cell parameters of each parallel cell in the household energy storage system according to the sensor corresponding to each parallel cell, the method further includes: Comparing the real-time battery cell parameters with the battery cell parameter ranges corresponding to the respective working states of the parallel battery cells to determine the working state of the parallel battery cells; If it is determined that the working state of the parallel battery cells is abnormal, the branch where the parallel battery cells are located is cut off.

[0008] Optionally, in one or more embodiments of this specification, determining the operating characteristics of each of the parallel cells based on the real-time cell parameters and the charge and discharge history data of each of the parallel cells specifically includes: Based on the real-time battery cell parameters and charge and discharge history data of each of the parallel battery cells, the dynamic model related parameters corresponding to each of the parallel battery cells are updated to obtain an updated dynamic model; Based on the updated dynamic model, simulating the maximum sustainable output power and efficiency curves of each of the parallel cells under different load conditions; Based on the maximum sustainable output power and efficiency curve, operating characteristics reflecting the current performance characteristics of the battery cell are generated; wherein the operating characteristics include: output capacity coefficient, dynamic response speed and remaining capacity.

[0009] Optionally, in one or more embodiments of this specification, based on the real-time status and current power demand of the household energy storage system, predicting the power output at the next moment specifically includes: Inputting historical power consumption data and influencing factors of each electrical device corresponding to the household energy storage system into a preset power demand prediction model to obtain current power demand; wherein the power demand prediction model is obtained based on long short-term memory network training; Determining the real-time status of the household energy storage system based on the operating characteristics of each of the parallel cells and system operation data; The real-time status, current power demand and historical power output data are input into a preset time series model to predict the power output at the next moment.

[0010] Optionally, in one or more embodiments of the present specification, determining the output power to be borne by each parallel battery cell based on the operating characteristics of each parallel battery cell specifically includes: Determining an output capability coefficient and a remaining capacity of each of the parallel cells based on operating characteristics of each of the parallel cells, and determining an upper limit of allocable power of each of the parallel cells based on the output capability coefficient and the remaining capacity; Determining an initial power allocation value for each of the parallel cells based on an upper limit of the allocable power of each of the parallel cells and the power output at the next moment; Based on the working characteristics of each of the parallel battery cells, the dynamic response speed of each of the parallel battery cells is determined, and the initial power distribution value of the parallel battery cells is adjusted based on the dynamic response speed to determine the output power to be borne by each of the parallel battery cells.

[0011] Optionally, in one or more embodiments of this specification, the conductivity of each of the parallel cells is adjusted according to a preset PID control algorithm and the deviation value to achieve dynamic adjustment of the output power, specifically including: Inputting the deviation value into a PID control algorithm corresponding to the PID controller of the household energy storage system to calculate a comprehensive adjustment amount based on the PID control algorithm; wherein the comprehensive adjustment amount is determined based on a proportional adjustment amount, an integral adjustment amount, and a differential adjustment amount; Converting the comprehensive adjustment amount into a conduction ratio corresponding to each of the parallel cells; The conduction time of the switch device of the branch where each of the parallel battery cells is located is dynamically adjusted based on the conduction ratio, so as to gradually adjust the output current of each of the parallel battery cells.

[0012] Optionally, in one or more embodiments of this specification, after adjusting the conductivity of each of the parallel cells according to a preset PID control algorithm and the deviation value to achieve dynamic adjustment of the output power, the method further includes: Real-time monitoring of the adjusted remaining capacity and real-time power demand of the household energy storage system; If it is determined that the remaining capacity of the household energy storage system is greater than the preset capacity threshold, or the real-time power demand decreases, then the adjustment of increasing the output power of the parallel battery cells is terminated; The output power of each of the parallel-connected cells is reduced in sequence until the household energy storage system is converted to a normal operating state.

[0013] One or more embodiments of this specification provide an output power control device for a household energy storage system, the device comprising: at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to: perform any of the above methods.

[0014] One or more embodiments of this specification provide a non-volatile computer storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute any of the above-described methods.

[0015] At least one of the above technical solutions adopted in the embodiments of this specification can achieve the following beneficial effects: Sensors are used to obtain core parameters such as voltage, current, and temperature of parallel cells in real time, enabling refined monitoring of the cell status. By analyzing the cell operating characteristics in combination with historical charge and discharge data, consistency differences between parallel cells can be identified, facilitating subsequent adjustments to the output power of the parallel cells to avoid overload damage. When the predicted power exceeds the threshold, the power to be borne is intelligently allocated based on the cell operating characteristics, allowing cells with high health and low internal resistance to bear more of the load, thereby avoiding excessive loss of some cells. The PID control algorithm is used to dynamically adjust the cell conductivity, enabling real-time feedback calibration of power output, effectively ensuring the stability of the household energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some of the embodiments described in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings: Figure 1 A schematic flow chart of an output power control method for a household energy storage system provided in an embodiment of this specification; Figure 2A schematic diagram of the structure of an output power control device for a household energy storage system provided in an embodiment of this specification; Figure 3 A schematic diagram of the structure of a non-volatile storage medium provided in an embodiment of this specification. DETAILED DESCRIPTION

[0017] The embodiments of this specification provide a method, device, and medium for controlling output power of a household energy storage system.

[0018] To help those skilled in the art better understand the technical solutions in this specification, the following will provide a clear and complete description of the technical solutions in the embodiments of this specification, in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of this specification, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this specification without creative work should fall within the scope of protection of this specification.

[0019] like Figure 1 As shown, the embodiment of this specification provides a flow chart of an output power control method for a household energy storage system. Figure 1 It can be seen that in one or more embodiments of this specification, a method for controlling the output power of a household energy storage system specifically includes the following steps: S101: Acquire real-time cell parameters of each parallel cell in the household energy storage system according to a sensor corresponding to each parallel cell; wherein the real-time cell parameters include at least voltage, current, and temperature.

[0020] To accurately obtain real-time information about each battery cell, a household energy storage system uses a high-precision sensor for each parallel cell. The central control unit can then obtain real-time parameters for each parallel cell based on the corresponding sensor. These parameters include at least voltage, current, and temperature. For example, a high-precision Hall effect current sensor is used to detect the current in each parallel cell.

[0021] Furthermore, in one or more embodiments of this specification, before obtaining the real-time cell parameters of each parallel cell in the household energy storage system according to the sensor corresponding to each parallel cell, the method further includes the following process: Initialize and configure the sensors corresponding to each parallel-connected cell in the household energy storage system to enable data acquisition for each sensor. Then, establish a communication link between the sensor and the household energy storage system. This link, in conjunction with a pre-set communication protocol, establishes a communication connection between the sensor and the household energy storage system, allowing the central control unit of the household energy storage system to obtain real-time cell parameters for each parallel-connected cell.

[0022] Furthermore, in order to immediately trigger the protection mechanism when an abnormality is detected, cut off the relevant battery branch, and prevent the fault from expanding. In one or more embodiments of this specification, after obtaining the real-time battery parameters of each parallel battery cell in the household energy storage system based on the sensor corresponding to each parallel battery cell, the method also includes the following process: First, the real-time cell parameters are compared with the cell parameter ranges corresponding to the operating states of the parallel cells to determine the operating state of each parallel cell. If the operating state of the parallel cell is determined to be abnormal, the branch where the parallel cell is located is disconnected.

[0023] During this process, independent sensors collect real-time data on parameters such as voltage, temperature, and current for each parallel cell. The central control unit can quickly identify abnormal cell conditions such as overcharging, overdischarging, and overheating, helping to prevent thermal runaway or cascading failures and significantly reducing safety risks. Furthermore, multi-sensor parallel data collection avoids the risk of single-point failure. Even if a sensor or cell fails, the system can still maintain operation using data from other nodes.

[0024] S102: Determine operating characteristics of each of the parallel battery cells based on the real-time battery cell parameters and charge and discharge history data of each of the parallel battery cells.

[0025] After the real-time battery cell parameters are obtained based on the above step S101, in order to be able to reflect the performance changes of the battery cells under different working conditions in real time, the embodiment of this specification will determine the working characteristics of each parallel battery cell based on the real-time battery cell parameters and the charging and discharging history data of each parallel battery cell, so as to facilitate the subsequent reasonable load distribution of each battery cell based on the working characteristics of each parallel battery cell and avoid the problem of overloading of some battery cells.

[0026] Specifically, in one or more embodiments of this specification, determining the operating characteristics of each parallel cell based on the real-time cell parameters and the charge and discharge history data of each parallel cell specifically includes the following process: Based on the real-time cell parameters and charge and discharge history data of each parallel cell, the relevant parameters of the dynamic model corresponding to each parallel cell are updated to obtain an updated dynamic model. For example, in a certain application scenario, the above real-time cell parameters and charge and discharge history data can be integrated based on an adaptive filtering algorithm or a machine learning model to dynamically correct the key parameters of the dynamic model of the cell, such as ohmic internal resistance, polarization capacitance, diffusion coefficient, etc. Then, based on the updated dynamic model, the maximum sustainable output power and efficiency curves of each parallel cell under different load conditions are simulated. Then, based on the obtained maximum sustainable output power and efficiency curves, operating characteristics reflecting the current performance characteristics of the cell are generated. Among them, the operating characteristics include: output capacity coefficient, dynamic response speed and remaining capacity. The acquisition process can be defined as the ratio of the current maximum sustainable output power to the rated power as the output capacity coefficient, and then the voltage recovery time when the battery cell switches from low load to high load is quantified through the step response test of the updated dynamic model. Based on the energy loss corresponding to the efficiency curve, the statistical relationship between the voltage recovery time and the power loss at the corresponding load point is analyzed to determine the dynamic response speed of the battery cell at various charge and discharge efficiencies. In addition, the remaining capacity is estimated by combining the real-time current integration of each parallel battery cell and the model prediction.

[0027] S103: If the power output at the next moment is predicted to be greater than the preset power based on the real-time status and current power demand of the household energy storage system, the output power to be assumed by each parallel battery cell is determined based on the working characteristics of each parallel battery cell.

[0028] If the power output at the next moment is predicted to be greater than the preset power based on the real-time status and current power demand of the household energy storage system, then in order to avoid uneven current distribution among the battery cells during high-power output, which may accelerate the aging or even damage of some battery cells due to overcurrent, seriously affecting the overall performance and service life of the energy storage system, the output power to be borne by each parallel battery cell will be determined based on the working characteristics of the parallel battery cells.

[0029] Specifically, in one or more embodiments of this specification, based on the real-time status and current power demand of the household energy storage system, predicting the power output at the next moment specifically includes: The historical power consumption data and influencing factors for each electrical device corresponding to the household energy storage system are input into a pre-set power demand prediction model to determine the current power demand. It should be noted that the power demand prediction model is based on long-short-term memory network training, and influencing factors include: current time, weather, and other factors. The real-time status of the household energy storage system is then determined based on the operating characteristics of each parallel battery cell and system operation data. The real-time status, current power demand, and historical power output data are then input into a pre-set time series model to predict the power output at the next moment.

[0030] This process integrates historical electricity consumption data and multi-dimensional influencing factors into the power demand forecast, avoiding forecast bias in complex scenarios. Furthermore, the real-time status is determined by combining the operating characteristics of each parallel battery cell with system operation data, ensuring the feasibility of the forecast results at the underlying physical level. Inputting real-time status, current power demand, and historical power output data into the time series model effectively captures the temporal correlation of power changes, enabling dynamic prediction of power output at the next moment and anticipating load fluctuations.

[0031] Specifically, in one or more embodiments of this specification, determining the output power to be borne by each parallel battery cell based on the operating characteristics of each parallel battery cell specifically includes: Based on the working characteristics of each parallel battery cell, the output capacity coefficient and the remaining capacity of each parallel battery cell are determined, and the upper limit of the distributable power of each parallel battery cell is determined based on the output capacity coefficient and the said remaining capacity. Then, based on the upper limit of the distributable power of each parallel battery cell and the power output at the next moment, the initial power distribution value of each parallel battery cell is determined. Based on the working characteristics of each parallel battery cell, the dynamic response speed of each parallel battery cell is determined, and the initial power distribution value of the parallel battery cell is adjusted according to the dynamic response speed to determine the output power to be borne by each parallel battery cell. By correcting the distribution scheme in combination with the dynamic response speed, it is ensured that the high response speed battery cell takes priority in assuming transient load fluctuations, and finally the output power to be borne by each battery cell is determined, so as to generate the control signal of each battery cell branch switch device based on the output power to be borne to realize the distribution of the output power of each parallel battery cell.

[0032] S104: Comparing the output power to be assumed with the actual output power to obtain a deviation value, and adjusting the conductivity of each of the parallel cells according to a preset PID control algorithm and the deviation value to achieve dynamic adjustment of the output power.

[0033] However, since the output power of each parallel battery cell may deviate during high-power output, in order to ensure the stable operation of the household energy storage system, in the embodiments of this specification, the output power to be assumed is compared with the actual output power to obtain a deviation value, and then the conductivity of each parallel battery cell is adjusted according to the preset PID control algorithm and the deviation value to achieve dynamic adjustment of the output power.

[0034] Specifically, in one or more embodiments of this specification, the conductivity of each of the parallel cells is adjusted according to a preset PID control algorithm and the deviation value to achieve dynamic adjustment of the output power, which specifically includes: The deviation value is input into the PID control algorithm corresponding to the PID controller of the household energy storage system, so as to calculate the comprehensive adjustment amount according to the PID control algorithm. It should be noted that the comprehensive adjustment amount is determined based on the proportional adjustment amount, the integral adjustment amount and the differential adjustment amount. The comprehensive adjustment amount is then converted into the conduction ratio corresponding to each of the parallel battery cells. According to the obtained conduction ratio, the conduction time of the switching device of the branch where each parallel battery cell is located is dynamically adjusted to gradually adjust the output current of each parallel battery cell. In this process, a real-time feedback adjustment mechanism is adopted to quickly respond to the deviation in the power output process through the PID control algorithm to ensure that the current of each battery cell is evenly distributed, the output power is stable, and the voltage fluctuation is effectively suppressed. Furthermore, in one or more embodiments of this specification, after adjusting the conductivity of each parallel cell according to a preset PID control algorithm and a deviation value to achieve dynamic adjustment of the output power, the method further includes the following process: First, the adjusted remaining capacity and real-time power demand of the household energy storage system are monitored in real time. If it is determined that the remaining capacity of the household energy storage system is greater than the preset capacity threshold, or the real-time power demand is reduced, the adjustment of increasing the output power of the parallel battery cells is terminated. The output power of each of the parallel battery cells is then reduced in sequence until the household energy storage system is converted to a normal operating state. In other words, when the power demand of household electrical appliances decreases or the remaining capacity of the energy storage system reaches the set threshold, the system enters the end stage. At this time, the central control unit readjusts the power allocation strategy, gradually reducing the output power of each battery cell until the system returns to normal operating state.

[0035] like Figure 2 As shown in FIG, the embodiment of this specification provides a schematic diagram of the structure of an output power control device for a household energy storage system. Figure 2 It can be seen that in one or more embodiments of this specification, an output power control device for a household energy storage system includes: at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to: perform any of the above methods.

[0036] like Figure 3 As shown in FIG, the embodiment of this specification provides a structural diagram of a non-volatile storage medium. Figure 3 It can be seen that in one or more embodiments of this specification, a non-volatile storage medium stores computer-executable instructions 301, and the computer-executable instructions 301 can: execute any of the methods described above.

[0037] The various embodiments in this specification are described in a progressive manner. Similar portions between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the device, apparatus, and non-volatile computer storage medium embodiments are generally similar to the method embodiments, so their descriptions are relatively simplified. For relevant details, refer to the descriptions of the method embodiments.

[0038] The foregoing description of this specification describes specific embodiments. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that described in the embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order shown or the sequential order to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0039] The foregoing description is merely one or more embodiments of this specification and is not intended to limit this specification. It will be apparent to those skilled in the art that various modifications and variations may be made to one or more embodiments of this specification. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of one or more embodiments of this specification are intended to be within the scope of the claims of this specification.

Claims

1. A method for controlling output power of a household energy storage system, characterized in that: The method comprises: According to the sensors corresponding to the parallel cells in the household energy storage system, real-time cell parameters of the parallel cells are obtained; wherein the real-time cell parameters include at least: voltage, current and temperature; Determining the operating characteristics of each of the parallel cells based on the real-time cell parameters and the charge and discharge history data of each of the parallel cells; If, based on the real-time status of the household energy storage system and the current power demand, it is predicted that the power output at the next moment is greater than the preset power, the output power to be assumed by each parallel battery cell is determined based on the operating characteristics of each parallel battery cell; The output power to be assumed is compared with the actual output power to obtain a deviation value, so as to adjust the conductivity of each parallel battery cell according to a preset PID control algorithm and the deviation value to achieve dynamic adjustment of the output power.

2. The output power control method of a household energy storage system according to claim 1, characterized in that: Before obtaining the real-time cell parameters of each parallel cell in the household energy storage system according to the sensor corresponding to each parallel cell, the method further includes: Initializing and configuring the sensors corresponding to the parallel-connected cells in the household energy storage system to enable data acquisition functions of the sensors; A communication link between the sensor and the household energy storage system is obtained, so as to establish a communication connection between the sensor and the household energy storage system based on the communication link and a preset communication protocol.

3. The output power control method of a household energy storage system according to claim 1, characterized in that: After obtaining the real-time cell parameters of each parallel cell in the household energy storage system according to the sensor corresponding to each parallel cell, the method further includes: Comparing the real-time battery cell parameters with the battery cell parameter ranges corresponding to the respective working states of the parallel battery cells to determine the working state of the parallel battery cells; If it is determined that the working state of the parallel battery cells is abnormal, the branch where the parallel battery cells are located is cut off.

4. The output power control method of a household energy storage system according to claim 1, characterized in that: Determining the operating characteristics of each of the parallel cells based on the real-time cell parameters and the charge and discharge history data of each of the parallel cells specifically includes: Based on the real-time battery cell parameters and charge and discharge history data of each of the parallel battery cells, the dynamic model related parameters corresponding to each of the parallel battery cells are updated to obtain an updated dynamic model; Based on the updated dynamic model, simulating the maximum sustainable output power and efficiency curves of each of the parallel cells under different load conditions; Based on the maximum sustainable output power and efficiency curve, operating characteristics reflecting the current performance characteristics of the battery cell are generated; wherein the operating characteristics include: output capacity coefficient, dynamic response speed and remaining capacity.

5. The output power control method of a household energy storage system according to claim 1, characterized in that: Based on the real-time status of the household energy storage system and the current power demand, the power output at the next moment is predicted, specifically including: Inputting historical power consumption data and influencing factors of each electrical device corresponding to the household energy storage system into a preset power demand prediction model to obtain current power demand; wherein the power demand prediction model is obtained based on long short-term memory network training; Determining the real-time status of the household energy storage system based on the operating characteristics of each of the parallel cells and system operation data; The real-time status, current power demand and historical power output data are input into a preset time series model to predict the power output at the next moment.

6. The output power control method of a household energy storage system according to claim 1, characterized in that: Determining the output power to be borne by each parallel battery cell based on the operating characteristics of each parallel battery cell specifically includes: Determining an output capability coefficient and a remaining capacity of each of the parallel cells based on operating characteristics of each of the parallel cells, and determining an upper limit of allocable power of each of the parallel cells based on the output capability coefficient and the remaining capacity; Determining an initial power allocation value for each of the parallel cells based on an upper limit of the allocable power of each of the parallel cells and the power output at the next moment; Based on the working characteristics of each of the parallel battery cells, the dynamic response speed of each of the parallel battery cells is determined, and the initial power distribution value of the parallel battery cells is adjusted based on the dynamic response speed to determine the output power to be borne by each of the parallel battery cells.

7. The output power control method of a household energy storage system according to claim 1, characterized in that: According to the preset PID control algorithm and the deviation value, the conductivity of each parallel battery cell is adjusted to achieve dynamic adjustment of the output power, specifically including: Inputting the deviation value into a PID control algorithm corresponding to the PID controller of the household energy storage system to calculate a comprehensive adjustment amount based on the PID control algorithm; wherein the comprehensive adjustment amount is determined based on a proportional adjustment amount, an integral adjustment amount, and a differential adjustment amount; Converting the comprehensive adjustment amount into a conduction ratio corresponding to each of the parallel cells; The conduction time of the switch device of the branch where each of the parallel battery cells is located is dynamically adjusted based on the conduction ratio, so as to gradually adjust the output current of each of the parallel battery cells.

8. The output power control device of a household energy storage system according to claim 1, characterized in that: After adjusting the conductivity of each of the parallel cells according to a preset PID control algorithm and the deviation value to achieve dynamic adjustment of the output power, the method further includes: Real-time monitoring of the adjusted remaining capacity and real-time power demand of the household energy storage system; If it is determined that the remaining capacity of the household energy storage system is greater than the preset capacity threshold, or the real-time power demand decreases, then the adjustment of increasing the output power of the parallel battery cells is terminated; The output power of each of the parallel-connected cells is reduced in sequence until the household energy storage system is converted to a normal operating state.

9. An output power control device for a household energy storage system, characterized in that: The device comprises: at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to: execute the method according to any one of claims 1 to 8.

10. A non-volatile storage medium storing computer-executable instructions, characterized in that: The computer executable instructions can execute the method according to any one of claims 1 to 8.

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