Power supply power distribution method and multi-power instant water heater

Abstract

The application belongs to the technical field of intelligent household appliances, and particularly relates to a power supply power distribution method and a multi-power instant water heater. The multi-power instant water heater comprises a commercial power supply module and at least one group of battery modules. The current water flow and the inlet water temperature of the multi-power instant water heater, the power supply voltage of the commercial power supply module and the battery state parameters of the at least one group of battery modules are monitored. Based on the set outlet water temperature, the current water flow and the inlet water temperature, the current demand power is determined. When the power supply voltage and the battery state parameters both meet the power supply condition, and the current demand power exceeds the preset power grid carrying power, the power of the commercial power supply module and the at least one group of battery modules in joint power supply is determined based on the current demand power. The method improves the continuous heating capacity of the water heater, improves the stability of the outlet water temperature, improves the energy utilization efficiency, and reduces the load pressure on the power grid side.

Description

Technical Field

[0001] This application relates to the field of smart home appliance technology, and in particular to a power distribution method and a multi-power instant water heater. Background Technology

[0002] Instantaneous electric water heaters typically use mains power to drive the heating element and provide instant hot water through fixed power output or conventional power adjustment.

[0003] However, this type of solution mainly relies on a single mains power supply, which makes it difficult to provide continuous power in scenarios with grid fluctuations, limited carrying capacity, or power outages. At the same time, its power regulation is not adaptable enough to load changes and external power supply status, which can easily lead to a decrease in energy utilization efficiency and affect the stability of the outlet water temperature.

[0004] Therefore, how to improve the power supply continuity and temperature stability of instant electric water heaters under complex power supply conditions has become an urgent technical problem to be solved. Summary of the Invention

[0005] This application provides a power distribution method and a multi-power instantaneous water heater to improve the power supply continuity and temperature stability of the instantaneous electric water heater under complex power supply conditions.

[0006] In a first aspect, embodiments of this application provide a power distribution method applied to a multi-power instantaneous water heater, the multi-power instantaneous water heater including a mains power supply module and at least one battery module, the method comprising:

[0007] Monitor the current water flow and inlet water temperature of the multi-power instant water heater, as well as the power supply voltage of the mains power supply module and the battery status parameters of at least one set of battery modules;

[0008] The current power demand is determined based on the set outlet water temperature, current water flow rate, and inlet water temperature.

[0009] When the power supply voltage and battery status parameters meet the power supply conditions, and the current power demand exceeds the preset grid carrying capacity, the power of the mains power supply module and at least one set of battery modules is determined based on the current power demand.

[0010] Based on the current power demand, determine the power output of the mains power supply module and at least one set of battery modules when they are used together for power supply, including:

[0011] Obtain the fluctuation parameters of the mains voltage, and / or, at least one set of battery operating parameters of the battery module;

[0012] Based on fluctuation parameters and / or battery operating parameters, determine the power supply coefficient of the mains power supply module and / or at least one set of battery modules;

[0013] Determine the preset power limit for the mains power supply module and / or at least one set of battery modules, and adjust the preset power limit based on the power supply coefficient;

[0014] Based on the revised preset power limit and the current power demand, determine the power of the mains power supply module and at least one set of battery modules when they are jointly powered.

[0015] In one possible implementation, the power output of the mains power supply module and at least one set of battery modules when jointly powered is determined based on the current power demand, including:

[0016] The power of the mains power supply module during combined power supply is determined to be the preset grid carrying capacity.

[0017] When the current power demand is greater than the preset grid carrying capacity but less than the first total power supply, the power of at least one set of battery modules when jointly supplying power is determined to be the difference between the current power demand and the preset grid carrying capacity; the first total power supply is the sum of the preset grid carrying capacity and the maximum output power of at least one set of battery modules.

[0018] When the current power demand is greater than or equal to the first total power supply, the power of at least one set of battery modules when jointly powered is determined to be the maximum output power of at least one set of battery modules.

[0019] In one possible implementation, the power supply coefficient of the mains power supply module and / or at least one set of battery modules is determined based on fluctuation parameters and / or battery operating parameters, including:

[0020] When the fluctuation parameters meet the first triggering condition, the first power supply coefficient of the mains power supply module is determined based on the fluctuation parameters;

[0021] When the battery operating parameters meet the second triggering condition, the second power supply coefficient of at least one set of battery modules is determined based on the battery operating parameters.

[0022] In one possible implementation, the preset power limit includes a first preset power limit; the preset power limit is corrected based on a power supply coefficient; and the power of the mains power supply module and at least one set of battery modules when jointly powered is determined based on the corrected preset power limit and the current power demand, including:

[0023] Based on the first power supply coefficient, the first preset power limit of the mains power supply module is corrected;

[0024] The power of the mains power supply module during combined power supply is determined to be the corrected first preset power limit.

[0025] When the current power demand is greater than the revised first preset power limit, the power of at least one set of battery modules when jointly supplying power is determined based on the difference between the current power demand and the revised first preset power limit.

[0026] In one possible implementation, the preset power limit further includes a second preset power limit; the preset power limit is corrected based on a power supply coefficient, and the power of the mains power supply module and at least one set of battery modules when jointly powered is determined based on the corrected preset power limit and the current power demand, including:

[0027] Based on the second power supply coefficient, the second preset power limit of at least one set of battery modules is corrected;

[0028] The power of the mains power supply module during combined power supply is determined to be the preset grid carrying capacity.

[0029] When the current power demand is greater than the preset grid carrying capacity and less than the second total power supply, the power of at least one set of battery modules when jointly supplying power is determined to be the difference between the current power demand and the preset grid carrying capacity; the second total power supply is the sum of the preset grid carrying capacity and the corrected second preset power upper limit;

[0030] When the current power demand is greater than or equal to the second total power supply, the power of at least one group of battery modules when jointly supplying power is determined to be the corrected second preset power limit.

[0031] In one possible implementation, the method further includes:

[0032] When the supply voltage does not meet the power supply conditions but the battery status parameters do, determine the power of at least one battery module when supplying power based on the current power demand; or,

[0033] When the power supply voltage meets the power supply conditions but the battery status parameters do not meet the power supply conditions, control at least one group of battery modules to enter standby or hibernation state, and determine the power of the mains power supply module when supplying power based on the current power demand.

[0034] In one possible implementation, the power of the mains power supply module during power supply is determined based on the current power demand, including:

[0035] If the current power demand is less than the preset grid carrying capacity, the power of the mains power supply module when supplying power is determined to be the current power demand, and the mains power supply module is controlled to supply power to at least one battery module according to the power difference.

[0036] The differential power is the difference between the preset grid carrying capacity and the current demand power.

[0037] In one possible implementation, the method further includes:

[0038] After the battery status parameters of at least one set of battery modules meet the power supply conditions, the standby or hibernation state of at least one set of battery modules is released so that they can be jointly powered by the mains power supply module.

[0039] In one possible implementation, the method further includes:

[0040] Obtain the identification information of multi-power instant water heaters;

[0041] The wire diameter specifications of multi-power instant water heaters are determined from a preset correspondence based on the identification information.

[0042] Based on the wire diameter specifications, determine the preset power grid carrying capacity.

[0043] Secondly, embodiments of this application provide a power distribution device, comprising:

[0044] The parameter monitoring module is used to monitor the current water flow and inlet water temperature of the multi-power instant water heater, as well as the power supply voltage of the mains power supply module and the battery status parameters of at least one set of battery modules.

[0045] The power demand calculation module is used to determine the current power demand based on the set outlet water temperature, current water flow rate, and inlet water temperature.

[0046] The power distribution module is used to determine the power of the mains power supply module and at least one set of battery modules when the power supply voltage and battery status parameters meet the power supply conditions and the current power demand exceeds the preset grid carrying capacity, based on the current power demand.

[0047] The power distribution module is specifically used to acquire the fluctuation parameters of the mains voltage and / or the battery operating parameters of at least one set of battery modules; based on the fluctuation parameters and / or battery operating parameters, determine the power supply coefficient of the mains power supply module and / or at least one set of battery modules; determine the preset power upper limit of the mains power supply module and / or at least one set of battery modules, and correct the preset power upper limit based on the power supply coefficient; and determine the power of the mains power supply module and at least one set of battery modules when jointly supplying power based on the corrected preset power upper limit and the current power demand.

[0048] Thirdly, this application provides a multi-power instant water heater, including: a water heater body, a power distribution unit, a mains power supply module, and a battery module;

[0049] The power distribution unit is configured to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0050] Fourthly, embodiments of this application provide an electronic device, including: a memory and a processor;

[0051] The memory stores the instructions that the computer executes;

[0052] The processor executes computer execution instructions stored in memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0053] Fifthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementations of the first aspect.

[0054] Sixthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect.

[0055] The power distribution method and multi-power instant water heater provided in this application monitor the current water flow and inlet water temperature of the multi-power instant water heater, as well as the power supply voltage of the mains power supply module and the battery status parameters of at least one set of battery modules; determine the current power demand based on the set outlet water temperature, current water flow, and inlet water temperature; when the power supply voltage and battery status parameters meet the power supply conditions and the current power demand exceeds the preset grid carrying capacity, determine the power of the mains power supply module when jointly supplying power as the preset grid carrying capacity; when the current power demand is greater than the preset grid carrying capacity but less than the first total power supply, determine the power of at least one set of battery modules. The power of the battery modules during joint power supply is the difference between the current demand power and the preset grid capacity. When the current demand power is greater than or equal to the first total power supply, the power of at least one battery module during joint power supply is determined to be the maximum output power of at least one battery module. When the supply voltage does not meet the power supply conditions but the battery status parameters meet the power supply conditions, the power of at least one battery module during power supply is determined based on the current demand power. When the supply voltage meets the power supply conditions but the battery status parameters do not meet the power supply conditions, at least one battery module is controlled to enter standby or hibernation state, and the power of the mains power supply module during power supply is determined based on the current demand power. This method achieves on-demand power allocation and multi-power source collaborative power supply in scenarios where grid capacity is limited or power supply fluctuates, thereby improving the continuity of power supply, energy utilization efficiency, and outlet water temperature stability of instantaneous water heaters. It solves the problems of poor power supply continuity, insufficient temperature stability, and low energy utilization of instantaneous water heaters under complex power supply conditions, improves the continuous heating capacity of water heaters, improves the stability of outlet water temperature, increases energy utilization efficiency, and reduces the load pressure on the grid side. Attached Figure Description

[0056] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0057] Figure 1 This is a flowchart illustrating the power distribution method provided in this application. Figure 1 ;

[0058] Figure 2 This is a flowchart illustrating the power distribution method provided in this application. Figure 2 ;

[0059] Figure 3 This is a schematic diagram of the power distribution device provided in this application;

[0060] Figure 4 This is a schematic diagram of the structure of the electronic device provided in this application.

[0061] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0063] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with relevant laws, regulations and standards, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0064] Existing instantaneous electric water heaters typically use mains power to drive the heating element and operate according to a preset power or conventional power adjustment logic. Their basic principle is to control the heating power based on the set temperature after detecting water demand, thereby achieving the target outlet water temperature. Under conditions of stable power supply and minimal load variation, this type of solution can meet basic instant hot water needs.

[0065] However, in practical applications, relying solely on mains power supply is highly dependent on the external power grid. When the grid voltage fluctuates, the grid's carrying capacity is limited, or a power outage occurs, the water heater is prone to problems such as insufficient power supply, heating interruption, or significant fluctuations in the outlet water temperature.

[0066] Especially when the water flow rate changes rapidly and the inlet water temperature fluctuates greatly, traditional fixed power or simple power adjustment methods are difficult to match the actual power demand in a timely manner, resulting in a decrease in energy utilization efficiency and further affecting user comfort and equipment operation stability.

[0067] The aforementioned defects not only prevent users from continuously obtaining stable hot water under high load or abnormal power supply scenarios, but may also cause the equipment to operate for a long time when it is close to the grid's capacity limit, increasing the pressure on the power supply side and making it difficult to balance continuous power supply, energy-saving operation and stable temperature control.

[0068] Therefore, how to improve the power supply continuity and temperature stability of instant electric water heaters under complex power supply conditions has become an urgent technical problem to be solved.

[0069] To address the aforementioned issues, this application provides a power allocation method applied to a multi-power instant water heater. The multi-power instant water heater includes a mains power supply module and at least one set of battery modules. This method monitors the current water flow rate, inlet water temperature, mains power supply module voltage, and battery status parameters of the at least one set of battery modules. Based on the set outlet water temperature, current water flow rate, and inlet water temperature, it determines the current power demand. When the power supply voltage and battery status parameters meet the power supply conditions and the current power demand exceeds the preset grid capacity, it further determines the power required by the mains power supply module and the at least one set of battery modules when jointly supplying power. This method enables on-demand power allocation and multi-power coordinated energy supply in scenarios with limited grid capacity or power fluctuations, thereby improving the continuity of power supply, energy utilization efficiency, and outlet water temperature stability of the instant water heater.

[0070] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0071] The power distribution method of this application is applied to a multi-power instant water heater, which includes a mains power supply module and at least one battery module, thereby enabling coordinated power distribution based on different power states and real-time water demand to improve the hot water supply capacity and temperature control effect in complex power supply environments; wherein, the multi-power instant water heater, as the main body, is equipped with a heating component, a mains power supply module, a battery module and a control unit.

[0072] The aforementioned control unit is communicatively connected to the heating component, the mains power supply module, and the battery module, respectively, to receive relevant detection signals and perform subsequent power allocation calculations. For example, the control unit is configured to acquire relevant detection signals such as water flow detection signals, inlet and outlet water temperature detection signals, mains power operation status, battery voltage / current / SOC status (State of Charge), and circuit protection signals, to perform power allocation logic such as target heating power solution, mains branch power upper limit constraint, and battery branch compensation power calculation, and to issue control commands to adjust the power output from the mains power supply module and the battery module to the heating component.

[0073] In one possible implementation, the control unit can be the main control board of a multi-power instant water heater; wherein, the main control board has a built-in drive control circuit, which can use periodic on-off power regulation control for the mains power branch and PWM (Pulse Width Modulation) stepless power control for the battery module branch, so as to realize the coordinated output of the two heat sources.

[0074] In another possible implementation, the control unit can also be a smart home central control center, a whole-house smart gateway, or a cloud server. The external central control performs power distribution calculations and issues control commands, and the local hardware of the multi-power instant water heater performs power adjustment.

[0075] Figure 1 A flowchart illustrating the multi-device collaborative control method provided in this application embodiment. Figure 1 The executing entity in this embodiment can be, for example, the main control board of a multi-power instantaneous water heater. Figure 1 As shown, the multi-device collaborative control method provided in this embodiment includes:

[0076] S101: Monitor the current water flow and inlet water temperature of the multi-power instant water heater, as well as the power supply voltage of the mains power supply module and the battery status parameters of at least one set of battery modules.

[0077] In this embodiment, a multi-power instant water heater is the main actuator. The water heater is equipped with a heating component, a main control board, a mains power supply module, at least one set of battery modules, and a detection unit corresponding to parameter monitoring. The main control board establishes electrical or signal connections with each detection unit and each power supply module to collect operating data during water use.

[0078] Understandably, the current water flow rate refers to the amount of water flowing through the heating element per unit time, used to characterize the current water load of the water heater; the inlet water temperature is used to characterize the initial temperature of the water before entering the heating element; the power supply voltage refers to the real-time voltage value of the mains power supply module, used to reflect the current power supply capacity of the mains power supply module; the battery status parameters are used to reflect whether the battery module is in a working state that can participate in power supply, and these battery status parameters include, for example, battery voltage, remaining battery power, and cell temperature.

[0079] During water usage, the main control board monitors the current water flow and inlet water temperature of the multi-power instant water heater, as well as the power supply voltage of the mains power supply module and the battery status parameters of at least one set of battery modules, and uses the monitoring results as the input basis for subsequent demand power calculation and joint power supply determination.

[0080] For example, when a user turns on an instant water heater, the main control board obtains the inlet water temperature through a temperature sensor, calculates the real-time water flow through a flow meter, and monitors the voltage status of the mains power and the battery through a voltage sensor.

[0081] Understandably, by synchronously monitoring the water-side load parameters (i.e., the current water flow rate) and the power supply-side status parameters, the main control board can obtain changes in thermal load and power supply capacity at the same control moment, thereby providing a data basis for subsequent demand power calculation and joint power supply distribution.

[0082] S102: Determine the current power demand based on the set outlet water temperature, current water flow rate, and inlet water temperature.

[0083] Understandably, the set outlet water temperature can be the target outlet water temperature input by the user, or it can be the target value written by the system according to the preset working mode; the current power demand is used to characterize the heating power required by the heating component to make the outlet water reach the set outlet water temperature under the current flow rate and inlet water temperature conditions, and it is the basis for subsequent power allocation.

[0084] After completing the parameter monitoring in step S101, the main control board reads the set outlet water temperature, current water flow rate and inlet water temperature in the current control cycle, and determines the current required power according to the heat demand and power conversion relationship.

[0085] In one possible implementation, when the set outlet water temperature is higher than the inlet water temperature, the main control board calculates the current power demand using Formula 1, as follows:

[0086]

[0087] in, The current power demand is expressed in watts (W). This is the real-time water flow rate, expressed in kg / s. is the specific heat capacity of water, expressed in J / (kg·℃); To set the outlet water temperature, the unit is ℃; The inlet water temperature is expressed in °C. The overall heating efficiency of a water heater, encompassing the conversion of electrical energy into heat absorption in the water, is dimensionless and... .

[0088] In another possible implementation, if the outlet water temperature is set not to be higher than the inlet water temperature, the main control board will set the current required power to zero or maintain the minimum control power to match the operating state of no heating or fine-tuning temperature.

[0089] Understandably, this step transforms the user's target temperature and real-time water-side operating conditions into an actionable power target, providing a clear control benchmark for subsequent combined AC and battery power distribution. It should be understood that the parameter formats and conversion methods in the above formulas can be set according to the water heater's model specifications and control requirements; the above example is merely illustrative and not limiting.

[0090] S103: When the power supply voltage and battery status parameters meet the power supply conditions, and the current power demand exceeds the preset grid carrying capacity, determine the power of the mains power supply module and at least one set of battery modules when jointly supplying power based on the current power demand.

[0091] In this embodiment of the application, the power supply conditions are used to limit whether the mains power supply module and at least one set of battery modules are allowed to enter the output state. The power supply conditions include the power supply conditions of the mains power supply module and the power supply conditions of the battery module. The main control board collects the corresponding parameters (i.e., power supply voltage and battery status parameters) to determine whether the corresponding power supply conditions are met.

[0092] Correspondingly, before performing the joint power supply determination, the main control board first compares the power supply voltage obtained in step S101 with the preset voltage threshold range, and compares the battery status parameters with the preset battery power supply conditions.

[0093] In practice, the mains power supply module meeting the power supply conditions can be defined as the input voltage being within the rated allowable range; at least one battery module meeting the power supply conditions can be defined as the battery status parameters meeting the preset power supply requirements.

[0094] Understandably, the preset grid carrying capacity is used to characterize the upper limit of the power allowed to be output by the mains power side under the current access environment. This value can be written into the main control board according to the access conditions during equipment installation and commissioning, and used as a reference for joint power supply judgment. Specifically, since the preset grid carrying capacity is constrained by the specifications of the incoming power line and the current carrying capacity of AC devices, the output power of the mains power supply module cannot continuously exceed this threshold. If the actual power demand of the water heater during the current operation exceeds this upper limit, it indicates that the maximum output power of the mains power supply module cannot meet the power required for heating during the current operation. That is, the mains power supply module cannot provide enough energy on its own. At this time, relying solely on the mains power supply module for heating will result in the water temperature not reaching the set temperature and insufficient hot water flow. Therefore, in order to ensure the constant water temperature effect, it is necessary to control the battery module for joint power supply.

[0095] When the main control board determines that the power supply voltage and battery status parameters meet the power supply conditions, and the current demand power obtained in step S102 exceeds the preset grid carrying capacity, it enters the joint power supply power determination process.

[0096] During the process of determining the combined power supply, the main control board determines the power of the mains power supply module and at least one set of battery modules when they are jointly powered, based on the current power demand and the preset grid carrying capacity, so that the total power of the combined power supply corresponds to the current power demand. After obtaining the corresponding power, the main control board outputs the corresponding control commands to the mains side and the battery side, and acts on the heating load through the heating components to make the combined power supply meet the current heating demand.

[0097] For example, the power supply condition of the mains power supply module can be whether the mains power supply voltage is greater than or within the rated allowable range. The main control board collects the mains power supply voltage sampling signal through the voltage sensor and determines whether the parameter meets the power supply condition. Specifically, if the mains power supply voltage is within the rated allowable range, it indicates that the mains power supply voltage meets the power supply condition. If the mains power supply voltage is not within the rated allowable range (at this time, the mains power supply voltage is approximately 0, which can be determined as a mains power disconnection or power outage), it indicates that the mains power supply voltage does not meet the power supply condition.

[0098] The power supply condition for the battery module can be determined by whether the remaining power of the battery module is greater than the preset effective battery power threshold. The main control board collects the remaining power of the battery module through a voltage sensor and determines whether this parameter meets the power supply condition. Specifically, if the remaining power is greater than the preset effective battery power threshold (for example, it can be 5%), it indicates that the remaining power meets the power supply condition. If the remaining power is not greater than the preset effective battery power threshold (at this time, the mains power supply voltage is approximately 0, which can be determined as the mains power being disconnected or interrupted), it indicates that the remaining power does not meet the power supply condition.

[0099] When the power supply voltage and battery status parameters meet the power supply conditions, and the current demand power obtained exceeds the preset grid carrying capacity, the water heater will use a combined power supply and enter the combined power supply power determination process. At this time, the mains power supply module will continuously output the maximum power allowed by the grid, and at the same time, the battery module will synchronously output compensation power. The mains power supply module and the battery module will work together to match the target demand power of the whole machine, so as to meet the hot water heating demand of large flow and large temperature rise.

[0100] Understandably, the main control board calculates the current power demand by collecting data on water flow, inlet water temperature, mains voltage, and battery status, combined with the set outlet water temperature. If the current power demand exceeds the preset grid capacity, it indicates that the maximum output power of the mains alone cannot meet the heating demand, resulting in a power shortfall. When both the mains power supply module and the battery module meet the power supply conditions, the combined power supply of the mains power supply module and at least one set of battery modules is allocated. This method solves the problem of power interruption caused by insufficient mains power supply through dynamic power allocation, and suppresses temperature fluctuations caused by power supply fluctuations by matching power demand in real time, thus achieving a dual improvement in power supply continuity and temperature stability.

[0101] Meanwhile, when mains power is available but the grid's capacity is limited, the mains power supply module and the battery module work together to supply power. This allows for matching grid-side limitations with actual heating demands within the same control framework, thus maintaining the continuous output of the instantaneous water heater under complex power supply conditions. It should be understood that the above-described method for determining the combined power supply and the threshold settings are for demonstration purposes only and are not limiting.

[0102] In this embodiment, the main control board performs water-side load monitoring, thermal power calculation, and power allocation on the power supply side in a continuous control process. This allows the power supply to be organized according to the power demand corresponding to the set outlet water temperature, even when the supply voltage is within the allowable range but the grid capacity is limited.

[0103] In another possible implementation, if the actual power demand of the water heater during operation is less than the preset grid carrying capacity when both the power supply voltage and battery status parameters meet the power supply conditions, it indicates that the maximum output power of the mains power supply module can meet the power required for heating during operation. In this case, heating can be provided solely by the mains power supply module without the need to control the battery module for joint power supply.

[0104] The main control board determines that the external heating power of the mains power supply module is equal to the current demand power; at the same time, it uses the remaining capacity of the mains power to charge at least one set of battery modules; wherein, the difference power available for charging is the difference between the preset grid carrying power and the current demand power, and the mains power supply module replenishes the battery modules according to this difference power.

[0105] Under normal circumstances, when heating is under low load, the mains power will take priority to handle the heating load, and the battery will no longer need to discharge to participate in the joint power supply. The surplus power of the mains power rating capacity will be used to charge the battery, making full use of the power grid's power supply capacity. Battery energy storage will be replenished without increasing the load on the grid, improving energy utilization efficiency and reserving power for subsequent high-power heating conditions.

[0106] In one possible implementation, the main control board executes the battery module charging and discharging mutual exclusion control rules to prohibit the same battery module from charging and discharging at the same time. If the battery module is in the charging state, before issuing the discharge command, the main control board first sends a stop charging command, and after the charging link is shut down, the discharge control process is started.

[0107] Meanwhile, when the remaining power of the battery module is higher than the preset power threshold, the discharge priority of the battery module is higher than the charging priority. In other words, if the power allocation result determines that the battery module needs to provide power to the outside world (joint power supply is required) under the premise that the battery module has the conditions to discharge, the main control board will immediately issue a stop charging command to terminate the current charging process, switch the battery module to the discharge working state, and participate in joint power supply.

[0108] Understandably, the charging and discharging mutual exclusion mechanism avoids problems such as circulating current and increased device losses caused by simultaneous charging and discharging of battery modules. By using power thresholds to divide scheduling priorities, when the battery power is sufficient, priority is given to ensuring the heating power supply needs of the water heater. Only when the battery does not need to supply power to the outside world will the surplus capacity of the mains power be used for charging. When the battery power is below the threshold, charging is given priority, and high-power battery discharge is limited, thus achieving a balance between battery safety management and load demand.

[0109] The power allocation method provided in this embodiment is applied to a multi-power instant water heater including a mains power supply module and at least one set of battery modules. It monitors the current water flow rate and inlet water temperature of the multi-power instant water heater, as well as the power supply voltage of the mains power supply module and the battery status parameters of at least one set of battery modules. Based on the set outlet water temperature, current water flow rate, and inlet water temperature, the current power demand is determined. When the power supply voltage and battery status parameters meet the power supply conditions, and the current power demand exceeds the preset grid capacity, the power of the mains power supply module and at least one set of battery modules when jointly supplying power is determined based on the current power demand. This method solves the problems of poor power supply continuity, insufficient temperature stability, and low energy utilization efficiency of instant water heaters under complex power supply conditions, improves the continuous heating capacity of the water heater, improves the stability of the outlet water temperature, increases energy utilization efficiency, and reduces the load pressure on the grid side.

[0110] Figure 2 A flowchart illustrating the multi-device collaborative control method provided in this application embodiment. Figure 2 .like Figure 2 As shown, in this embodiment... Figure 1 Based on the embodiments, the power distribution method is described in detail. The power distribution method shown in this embodiment includes:

[0111] S201: Monitor the current water flow and inlet water temperature of the multi-power instant water heater, as well as the power supply voltage of the mains power supply module and the battery status parameters of at least one set of battery modules.

[0112] S202: Determine the current power demand based on the set outlet water temperature, current water flow rate, and inlet water temperature.

[0113] Steps S201-S202 are similar to steps S101-S102 above, and will not be repeated here.

[0114] S203: When the power supply voltage and battery status parameters meet the power supply conditions, and the current power demand exceeds the preset grid carrying capacity, the power of the mains power supply module during joint power supply is determined to be the preset grid carrying capacity.

[0115] S204: When the current demand power is greater than the preset grid carrying capacity and less than the first total power supply, determine the power of at least one group of battery modules when jointly supplying power as the difference between the current demand power and the preset grid carrying capacity.

[0116] S205: When the current power demand is greater than or equal to the first total power supply, determine the power of at least one set of battery modules when they are jointly powered as the maximum output power of at least one set of battery modules.

[0117] The first total power supply is the sum of the preset grid carrying capacity and the maximum output power of at least one set of battery modules.

[0118] In actual control, after receiving the current power demand, the main control board first fixes the output of the mains power supply module to the preset grid carrying power, and then determines the relationship between the current power demand and the first total power supply.

[0119] When the current power demand is higher than the preset grid carrying capacity but not the first total power supply, the main control board calculates the battery module output power based on the difference and controls the battery module to discharge at that power, so that the grid power side and the battery side can jointly meet the load demand; when the current power demand reaches or exceeds the first total power supply, the main control board limits the battery module output to the maximum output power and keeps the grid power side output unchanged, thus forming a stable joint power supply upper limit.

[0120] Understandably, this power distribution method allows the mains power module to bear a fixed base power, while the battery module only supplements the excess. When the total demand exceeds the system capacity, the battery outputs at its maximum capacity, ensuring a clear and easy-to-implement power supply control relationship. This makes the power distribution during joint power supply match the grid capacity and battery discharge capacity, ensuring that the water heater maintains continuous power supply and stable output when the load changes.

[0121] In one possible implementation, the power allocation between the mains power supply module and at least one set of battery modules when jointly powered includes: acquiring fluctuation parameters of the mains voltage and / or battery operating parameters of at least one set of battery modules; determining the power supply coefficient of the mains power supply module and / or at least one set of battery modules based on the fluctuation parameters and / or battery operating parameters; determining a preset power upper limit for the mains power supply module and / or at least one set of battery modules, and correcting the preset power upper limit based on the power supply coefficient; and determining the power of the mains power supply module and at least one set of battery modules when jointly powered based on the corrected preset power upper limit and the current power demand.

[0122] Among them, the fluctuation parameter of the mains voltage is used to characterize the change of the output voltage of the mains power supply module. This change can be obtained by the main control board by statistically analyzing the instantaneous voltage deviation, peak-to-peak value or fluctuation amplitude within the sampling period.

[0123] Battery operating parameters are used to characterize the operating status of at least one set of battery modules, providing a data basis for the main control board to dynamically adjust the output limit of the battery modules and assess their health status. These operating statuses include, for example, real-time battery temperature, remaining charge, continuous operating time, state of charge, internal resistance change trend, or aging status. The main control board acquires these battery operating parameters based on data uploaded by the battery management unit, which is used to collect various original electrical parameters of the battery modules in real time, estimate the state of charge, perform charge and discharge protection, and report relevant data information of the battery modules to the main control board.

[0124] The power supply coefficient is used to correct the output capability of the mains power supply module or battery module. This coefficient can be a preset proportional coefficient, weighting coefficient, or attenuation coefficient, and can be dynamically updated based on voltage fluctuations and battery health status. This power supply coefficient corrects the rated output limit of the mains power supply module and battery module. Voltage fluctuations are used to measure the stability of the mains power supply, and battery health status is determined by combining cell temperature and internal resistance increase indicators. The main control board dynamically adjusts the power supply coefficient by identifying the current operating conditions in real time, thereby adaptively constraining the power supply output and balancing power performance and electrical safety. For example, the power supply coefficient is a preset proportional coefficient, and the range of this preset proportional coefficient is [0,1].

[0125] The preset power limit refers to the maximum allowable output power threshold of the mains power supply module or at least one set of battery modules, which is used to limit the external output power of the corresponding mains power supply module or at least one set of battery modules to prevent the output power from exceeding the hardware allowable range.

[0126] In the specific implementation, after the main control board collects the fluctuation parameters of the mains voltage, it compares the parameters with the preset stability threshold and generates the corresponding mains power supply coefficient accordingly. When the voltage fluctuation is large, the mains power supply coefficient is set to a lower value to reflect the decrease in the output capability of the mains side.

[0127] If battery operating parameters are collected simultaneously, the main control board will also generate a battery power supply coefficient based on battery temperature, remaining power, and aging status. When the battery temperature approaches the limit range or the remaining power is low, the corresponding coefficient will decrease synchronously.

[0128] Subsequently, the main control board determines the preset power limit of the mains power supply module and / or at least one set of battery modules, and corrects the preset power limit based on the power supply coefficient; then it performs a correlation calculation between the current power demand and the preset power limit to obtain the power distribution of the mains power supply module and battery modules when they are jointly powered, and outputs it to the power regulation unit to control the actual input power of the heating components.

[0129] Understandably, during the operation of an instant water heater, the power supply coefficient participates in power distribution as a real-time correction factor, enabling the output power of the combined power supply to be adjusted synchronously with fluctuations in the mains power or the battery's operating status.

[0130] Since both the mains power side and the battery side can independently generate corresponding coefficients based on real-time parameters, the main control board can directly obtain the combined power supply result of the two power sources when the current power demand changes, and use this result to control the heating power of the multi-power instant water heater. After adopting this method, a dynamic mapping relationship is established between the power distribution result and the power supply status, which can make the power supply distribution more in line with the actual available capacity, thereby improving the stability and adaptability of the combined power supply control.

[0131] In this embodiment, during the process of correcting the preset power limit based on the power supply coefficient, and determining the power of the mains power supply module and at least one set of battery modules when jointly supplying power based on the corrected preset power limit and the current power demand, a first trigger condition and a second trigger condition are also set as the determination conditions for switching the power allocation strategy. Specifically, when the fluctuation parameter meets the first trigger condition, the first power supply coefficient of the mains power supply module is determined based on the fluctuation parameter; when the battery operating parameter meets the second trigger condition, the second power supply coefficient of at least one set of battery modules is determined based on the battery operating parameter.

[0132] Understandably, the first trigger condition is related to the fluctuation parameters of the mains power supply module, which is used to determine whether there is a significant fluctuation in the mains power supply voltage. When the fluctuation parameter reaches a preset threshold, the first trigger condition is met. At this time, the dynamic correction logic of the mains power supply coefficient (i.e., the first power supply coefficient) is triggered to adapt to the changes in power output capability caused by the fluctuation of mains voltage.

[0133] The second trigger condition is associated with the battery operating parameters of the battery module and is used to determine whether the operating state of the battery module has reached the preset constraint boundary. When the battery operating parameters reach the preset constraint, the second trigger condition is met. At this time, the adaptive adjustment logic of the battery-side power supply coefficient (i.e., the second power supply coefficient) is triggered to realize the dynamic limitation of the battery output capacity.

[0134] In one possible implementation, the preset power limit includes a first preset power limit; when the fluctuation parameter meets a first trigger condition and the battery operating parameter does not meet a second trigger condition, a first power supply coefficient of the mains power supply module is determined based on the fluctuation parameter; the first preset power limit of the mains power supply module is corrected based on the first power supply coefficient; the power of the mains power supply module in combined power supply is determined to be the corrected first preset power limit; when the current demand power is greater than the corrected first preset power limit, the power of at least one battery module in combined power supply is determined based on the difference between the current demand power and the corrected first preset power limit.

[0135] The first preset power limit is the preset grid carrying capacity of the mains power supply module.

[0136] Understandably, fluctuation parameters are used to characterize the degree of change in the output conditions of the mains power supply module. For example, they can be composed of the sampled value of the mains voltage, the sampling mean square error, or the voltage deviation. The first trigger condition is used to trigger the power supply coefficient correction logic. Its implementation is that when the fluctuation parameter reaches a preset threshold, the main control board switches to the corresponding power allocation mode. The first power supply coefficient is used to correct the combined power supply of the mains power supply module. This coefficient can be obtained by the main control board based on the fluctuation parameters and is a coefficient less than 1. It is used to calculate the actual output power constraint value of the grid based on the preset grid carrying capacity, so that the actual output power of the mains power supply module is lower than the preset grid carrying capacity, thereby realizing the dynamic control of the output power under grid fluctuation conditions.

[0137] In practical implementation, after the main control board obtains the mains voltage fluctuation parameters, it compares them with a preset threshold. When it is determined that the first trigger condition is met, the first power supply coefficient is determined according to the pre-established correspondence. The first preset power limit (i.e., the preset grid carrying power) is multiplied by the coefficient to obtain the power limit of the mains power supply module when it is jointly powered. This power limit is written into the power control command as the actual output target of the mains side and sent to the rectification or power adjustment unit, so that the mains output is limited and adjusted according to voltage fluctuations.

[0138] Then, the main control board compares the current required power with the upper limit of the power. If the current required power is greater than the upper limit of the power, it calculates the difference between the two. If the battery operating parameters do not meet the second trigger condition, the difference obtained at this time is used as the target power when at least one group of battery modules are jointly powered.

[0139] For example, if the voltage deviation is used as a fluctuation parameter, the preset threshold can be set to ±10% of the rated voltage. When the sampled mains voltage deviates from the rated voltage by more than ±10%, the first trigger condition is determined to be met. The main control board queries the pre-stored mapping relationship to obtain the first power supply coefficient and lowers the upper limit of the allowed mains output power to avoid overload of the mains branch and insufficient actual output power under low voltage conditions.

[0140] Specifically, when the voltage deviation is +10%, the first power supply coefficient is 1.0; when the voltage deviation is -10%, the first power supply coefficient is 0.9; when the preset grid carrying capacity is 7kW, the first power supply coefficient is 0.9, and the maximum output power of the mains side is adjusted to 6.3kW to ensure stable power supply under mains power fluctuation conditions.

[0141] In this embodiment, the battery module may be composed of multiple series-parallel battery packs. In practical applications, other models of this component may also be selected, and this application does not limit this.

[0142] Understandably, by limiting the mains power output to the product of a first power supply coefficient related to the fluctuation parameters, and having the battery side supplement the excess, the combined power supply can match the real-time demand. The mains power output is adjusted in a timely manner according to the fluctuation state, and the battery side only intervenes when there is a gap, thereby keeping the power distribution consistent with the load demand and improving the stability and continuity of the combined power supply.

[0143] In one possible implementation, the preset power limit further includes a second preset power limit; when the fluctuation parameters do not meet the first triggering condition and the battery operating parameters meet the second triggering condition, a second power supply coefficient for at least one set of battery modules is determined based on the battery operating parameters; the second preset power limit for at least one set of battery modules is corrected based on the second power supply coefficient; the power of the mains power supply module in joint power supply is determined to be the preset grid carrying capacity; when the current demand power is greater than the preset grid carrying capacity and less than the second total power supply, the power of at least one set of battery modules in joint power supply is determined to be the difference between the current demand power and the preset grid carrying capacity; when the current demand power is greater than or equal to the second total power supply, the power of at least one set of battery modules in joint power supply is determined to be the corrected second preset power limit.

[0144] The second trigger condition is used to characterize whether the battery module's operating state has reached the preset constraint boundary. The second preset power limit is the maximum output power of at least one set of battery modules. The second total power supply is used to characterize the maximum combined available power of the mains power and the battery modules after coefficient correction, which is the sum of the preset grid carrying power and the corrected second preset power limit.

[0145] Understandably, the second total power supply is the sum of the product of the preset grid carrying capacity and the maximum output power of at least one set of battery modules (i.e., the second preset power limit) and the second power supply coefficient; when the mains power supply module and the battery module supply power together, the output of the mains power supply module is controlled to the preset grid carrying capacity to avoid exceeding the grid side's allowed carrying capacity limit.

[0146] In actual implementation, if the current acquired fluctuation parameters do not meet the first trigger condition, after the main control board acquires the battery operating parameters, it first makes a comprehensive judgment on the state of charge, discharge rate, temperature rise and cycle decay of the battery module. If at least one of the battery operating parameters meets the second trigger condition, the parameter that meets the threshold condition is mapped to the second power supply coefficient, and the second power supply coefficient is a coefficient less than 1, which is used to reduce the maximum output power of the battery module.

[0147] When the current power demand is between the preset grid carrying capacity and the second total power supply, the battery-side power output by the main control board is the difference between the two, so as to match the combined power supply with the current power demand; when the current power demand reaches or exceeds the second total power supply, the battery-side power is limited to the corrected second preset power limit, so that the battery can stably participate in power supply while meeting its own state constraints.

[0148] For example, if the battery operating parameters include battery temperature and internal resistance change, the corresponding preset constraint is set to a battery temperature greater than 55°C or an internal resistance increase exceeding 20%; if at least one indicator meets the constraint, it is determined that the battery operating parameters obtained this time meet the second trigger condition, and the main control board generates the corresponding battery power supply coefficient to reduce the maximum compensation power of the battery module and prevent the battery from overheating and accelerating aging caused by continuous high load operation; specifically, when the battery temperature is greater than the battery temperature threshold of 55°C and the internal resistance increase exceeds the internal resistance increase threshold of 20%, the corresponding second power supply coefficient can be 0.7.

[0149] Understandably, this combined power supply control method applies coefficient-based constraints to the output of the battery module when the battery's operating status is limited, and fixes the mains power supply power within the upper limit of the load capacity, so that the two power supplies can output in coordination under the same power boundary. As a result, the battery-side output can be matched with its operating status, while maintaining the stability of the mains power supply output, thus enabling the water heater to maintain continuous power supply even under high load or battery status changes.

[0150] In another possible implementation, when the fluctuation parameters meet the first trigger condition and the battery operating parameters meet the second trigger condition, a first power supply coefficient is determined according to a pre-established correspondence. The preset grid carrying power of the mains power supply module (i.e., the first preset power limit) is multiplied by this coefficient to obtain the power limit of the mains power supply module when supplying power in combination, which is the corrected first preset power limit. At the same time, at least one battery operating parameter that meets the second trigger condition is mapped to the corresponding second power supply coefficient. The product of the maximum output power of the battery side (i.e., the second preset power limit) and the second power supply coefficient is calculated to obtain the actual maximum output power of the current battery side, which is the corrected second preset power limit.

[0151] The main control board compares the current power demand with the corrected first preset power limit and calculates the initial power difference between the current power demand and the mains power limit. If the initial power difference is less than or equal to the corrected second preset power limit calculated by the battery module (that is, the maximum power that the battery module is currently allowed to output), then the initial power difference is determined as the target output power of the battery module for joint power supply. If the initial power difference is greater than the corrected second preset power limit calculated by the battery module, then the corrected second preset power limit calculated by the battery module is determined as the target output power of the battery module.

[0152] Understandably, when the fluctuation parameters meet the first trigger condition and the battery operating parameters meet the second trigger condition, not only is the upper limit of the mains power output corrected using the first power supply coefficient to adapt to the mains voltage fluctuation characteristics, but the maximum output power of the battery is also dynamically limited using the second power supply coefficient.

[0153] Since the mains power supply module and the battery module each have independent dynamic power boundaries, the actual output power of the battery module is simultaneously constrained by both the initial power difference and the upper limit of the battery's own operating conditions, thus balancing power supply stability and battery operation safety. It should be understood that the relevant thresholds and coefficient mapping relationships are merely exemplary implementations, and this application does not limit them.

[0154] In another possible implementation, if the fluctuation parameters do not meet the first trigger condition and the battery operating parameters do not meet the second trigger condition, it indicates that there is no significant voltage fluctuation in the mains power grid and the battery is operating well. In this case, there is no need to enable the dynamic correction logic of the power supply coefficients on both sides, and power allocation can be directly performed using a fixed upper limit.

[0155] Understandably, with the above control method, the output of the battery module is no longer fixed at the rated maximum value for distribution, but rather adaptively scaled according to the operating parameters. The deviation between the calculated combined power supply and the current power demand is smaller, the power supply distribution is more in line with the actual load demand, and the power fluctuation during the water heater's water heating process is also reduced. Since the mains power output is always limited by the preset grid carrying capacity, the grid side is under more stable pressure, and the battery side can compensate for the power gap within a controlled range, thereby improving the operational stability under combined power supply scenarios.

[0156] In one possible implementation, the preset threshold corresponding to the first triggering condition and the preset constraint corresponding to the second triggering condition are not fixed constants; both can be obtained through statistical analysis or learning from the historical operating data of the instantaneous water heater.

[0157] For the first trigger condition, the main control board can continuously collect long-term mains power fluctuation parameter samples, statistically identify the fluctuation parameter feature values ​​corresponding to frequent and severe fluctuations in mains power based on historical data, and set the feature value as the preset threshold of the first trigger condition; it can also train historical mains voltage fluctuation samples through machine learning and adaptively update the threshold to adapt to the differences in power grid environment in different areas where the equipment is deployed.

[0158] Regarding the second trigger condition, the main control board can continuously accumulate historical operating parameters of the battery module, such as battery continuous operating time, temperature of each charge and discharge cycle, internal resistance change trend, aging state, etc. Combined with battery safety operation specifications, it can determine the parameter indicators corresponding to the battery module approaching the safety constraint boundary, thereby forming the preset constraint corresponding to the second trigger condition. At the same time, as the battery module continues to be used and the degree of aging increases, it can also iteratively adjust the preset constraint based on newly added historical operating data, so as to realize the dynamic adaptation of the constraint condition to the battery aging state.

[0159] This application does not impose any special restrictions on the method of determining the first triggering condition and the second triggering condition.

[0160] S206: When the supply voltage does not meet the power supply conditions but the battery status parameters meet the power supply conditions, determine the power of at least one battery module when supplying power based on the current power demand.

[0161] S207: When the power supply voltage meets the power supply conditions but the battery status parameters do not meet the power supply conditions, control at least one group of battery modules to enter standby or hibernation state, and determine the power of the mains power supply module when supplying power based on the current power demand.

[0162] In actual operation, when the mains power supply voltage is lower than the preset threshold but the battery status parameters still meet the threshold requirements, the main control board calculates the power value that the battery module should output based on the current power demand, and converts the power value into the corresponding discharge current control command to drive the battery module to supply power to the heating component through the power conversion circuit.

[0163] The power conversion circuit can adopt a synchronous boost structure or a buck-boost structure. The specific model can be selected according to the voltage platform of the whole machine. In practical applications, other models can also be selected for this component. This application does not limit this.

[0164] When the mains power supply voltage meets the power supply requirements but the battery status parameters do not, the main control board controls the battery module to exit the discharge channel, putting it into standby or hibernation mode. Standby mode corresponds to low power consumption maintenance, while hibernation mode corresponds to stopping external discharge and shutting down some equalization and sampling circuits. Simultaneously, the main control board calculates the power output of the mains power supply module based on the current power demand and adjusts the input power of the heating component through the thyristor power regulation unit or relay switching unit. This control method keeps the battery module under control when it is not suitable for operation and ensures that the mains power supply provides power as needed.

[0165] Understandably, through the above methods, multi-power instant water heaters can be powered by the battery when the mains power is abnormal but the battery is available, and can also be powered independently by the mains power when the battery is low but the mains power is available. This ensures that the current power demand always has a corresponding power source, maintaining the continuity of the heating process and the matching of output power. Since the power supply switching is based on the joint judgment of the power supply voltage and battery status parameters, and the power distribution result is updated synchronously with the real-time load, the equipment can maintain stable operation in complex power supply environments.

[0166] In one possible implementation, when the power supply voltage meets the power supply conditions but the battery status parameters do not meet the power supply conditions, if the current power demand is less than the preset grid carrying capacity, then the power of the mains power supply module when supplying power is determined to be the current power demand, and the mains power supply module is controlled to supply power to at least one group of battery modules according to the difference power.

[0167] The differential power is the difference between the preset grid carrying capacity and the current demand power.

[0168] Understandably, the differential power is obtained in real time by the main control board by subtracting the current demand power from the preset grid carrying capacity, and is allocated to the battery module as redundant power on the mains side. This redundant power can be used for constant current charging or to maintain the available power of the battery module.

[0169] In actual control, the main control board first determines the current power demand, and then judges whether it is less than the preset grid carrying capacity. If the condition is met, the output power of the mains power supply module is set to the current power demand, and at the same time, a corresponding supplementary power supply command is generated, so that the mains power supply module outputs supplementary power to the battery module according to the power difference. The supplementary power is rectified or stepped down by the battery management unit and then enters the battery cell to complete energy recovery and state maintenance.

[0170] If the mains power supply module used is a switching power supply module with a rated power within a certain range, other models of this component can be selected in actual applications, and this application does not limit this.

[0171] Understandably, by enabling the mains power supply module to meet the current load demand of the water heater while using the unused capacity to replenish the battery module, the battery module can maintain a high available power during low load periods and take on the task of supplementing power supply when demand increases later. This makes the power distribution more in line with real-time load changes and enables the system to maintain continuous power supply capability in complex power supply environments.

[0172] In another possible implementation, if the redundant power is less than 100W, the power supply to at least one set of battery modules is stopped directly; at the same time, the redundant power is monitored in real time, and when the redundant power exceeds 150W, charging of at least one set of battery modules is started.

[0173] In addition, charging can be performed during off-peak hours when the battery module is not supplying power.

[0174] In one possible implementation, if the supply voltage meets the power supply conditions, it indicates that there is a valid mains power input. At this time, the battery status parameters of the battery module are monitored in real time. If the battery status parameters are not less than the first preset state threshold, it is determined that the battery module meets the battery power supply conditions. If the battery status parameters are less than the first preset state threshold, it is determined that the battery module does not meet the battery power supply conditions. At this time, the battery module is controlled to enter the standby state.

[0175] If the power supply voltage does not meet the power supply conditions, it indicates that there is no effective mains power input. At this time, the battery status parameters of the battery module are monitored in real time. If the battery status parameters are not less than the second preset state threshold, it is determined that the battery module meets the battery power supply conditions. If the battery status parameters are less than the second preset state threshold, it is determined that the battery module does not meet the battery power supply conditions. At this time, the battery module is controlled to enter the sleep state.

[0176] For example, the battery status parameter can be the remaining power, with a first preset state threshold of 5% and a second preset state threshold of 10%. If the power supply voltage meets the power supply conditions, and the remaining power is not less than 5%, it indicates that the battery module meets the battery power supply conditions, and the battery module can be used for joint power supply when the current power demand of the water heater is greater than the preset grid carrying capacity. If the remaining power is less than 5%, it indicates that the battery module does not meet the power supply conditions, and the battery module is controlled to enter the standby state.

[0177] If the power supply voltage does not meet the power supply conditions, and the remaining power is not less than 10%, it indicates that the battery module meets the power supply conditions, and the battery module is used for power supply; if the remaining power is less than 10%, it indicates that the battery module does not meet the power supply conditions, and the battery module is controlled to enter a sleep state; at the same time, when the battery module is in a sleep state, the whole machine can be woken up only by reconnecting to the mains power.

[0178] In another possible implementation, after the battery status parameters of at least one set of battery modules meet the power supply conditions, the standby or dormant state of at least one set of battery modules is released so as to jointly supply power with the mains power supply module.

[0179] In practice, the main control board continuously collects battery status parameters of at least one set of battery modules and compares them with preset power supply thresholds. When the battery status parameters are detected to meet the power supply conditions again, the main control board sends a wake-up command or enable command to the corresponding battery module to release its standby or hibernation state, so that the battery module can restore the output path and participate in power distribution according to the current joint power supply control strategy.

[0180] For example, the wake-up command can be implemented through relay control signals, MOS switch control signals or communication messages of the battery management system. After the battery module is restored, it can supply power to the DC bus according to the preset output voltage level and supply power to the water heater load together with the mains power supply module.

[0181] Understandably, when a multi-power instant water heater is working, if the battery module enters standby or hibernation mode due to insufficient power, abnormal battery temperature, or protection, the system is only maintained by the mains power supply module for basic power supply. When the battery status parameters return to normal and meet the power supply conditions, the system releases the low-power state of the battery module, allowing it to reconnect to the power supply circuit, thereby restoring the joint power supply relationship with the mains power supply module.

[0182] By adopting the above method, the battery module can promptly rejoin the power supply when it becomes available, the power supply mode switching is continuous, the combined power supply is restored quickly, and the output power of the water heater can be maintained stably when the battery is available and the mains power supply is available.

[0183] In one possible implementation, the identification information of the multi-power instantaneous water heater is obtained; the wire diameter specification of the multi-power instantaneous water heater is determined from a preset correspondence based on the identification information; and the preset power grid carrying capacity is determined based on the wire diameter specification.

[0184] Understandably, the identification information is used to characterize the specific product identity of a multi-power instant water heater. The identification information can be read by the main control board from the device nameplate, internal memory, or communication interface. For example, it can be the device model, product code, or configuration information.

[0185] The preset mapping relationship is used to map the identification information to the wire diameter specification. It can be stored in the local storage unit, remote server or controller built-in table, and the query can be completed according to the pre-established model and wiring specification mapping relationship.

[0186] The wire diameter specification is used to characterize the cross-sectional area, conductor material, or rated current carrying capacity of the mains access line. The main control board can find the matching allowable current value based on the specification and calculate the corresponding preset grid carrying power accordingly.

[0187] In actual implementation, after receiving the identification information, the main control board first performs format verification and encoding parsing on the identification information, and then searches for matching wire diameter specification entries in the preset correspondence. If the identification information corresponds to multiple wire diameter specification candidates, the final wire diameter specification is determined according to the preset priority, regional power grid parameters or factory configuration parameters.

[0188] Subsequently, the main control board calculates the preset grid carrying capacity based on the upper limit of current carrying capacity, wiring length compensation coefficient and safety margin coefficient corresponding to the wire diameter specification, and writes the power into the power distribution control parameters.

[0189] Understandably, the main control board can be integrated onto the water heater control circuit board and implemented using a single-chip microcomputer, microcontroller, or dedicated control chip. In practical applications, other models of this component can also be selected, and this application does not limit this.

[0190] The identification information, preset correspondence, wire diameter specifications and preset grid carrying capacity form a hierarchical mapping relationship, enabling the equipment to determine the power boundary that the mains side can carry according to the specific wiring configuration, and use this boundary as the basis for subsequent power allocation and joint power supply control; thus, the equipment can obtain grid carrying capacity parameters that match the actual cable conditions in different installation environments.

[0191] For example, the identification information (such as equipment model and product code) of a multi-power instant water heater includes wire diameter specifications (such as 4mm² and 6mm²). The main control board queries the wire diameter specifications from a preset correspondence based on the identification information and calculates the preset grid carrying power according to the wire diameter specifications. Specifically, when the wire diameter is 4mm², the maximum allowable current is 32A (corresponding to a power of approximately 7kW), and when the wire diameter is 6mm², the maximum allowable current is 40A (corresponding to a power of approximately 9kW). The main control board combines the maximum current carrying capacity corresponding to the wire diameter specifications, the wiring length compensation coefficient (such as increasing power loss by 1% for every 10m of cable), and the safety margin coefficient (such as retaining a 10% power margin) to finally determine the preset grid carrying power. This power value serves as the maximum output power limit of the mains power supply module and is used for power allocation decisions in joint power supply control.

[0192] By using the above method, the preset grid carrying capacity can correspond one-to-one with the wire diameter specifications of the equipment, thereby matching the power boundary of the mains side with the actual wiring capacity and providing accurate constraints for subsequent power allocation, reducing control deviations caused by inconsistent carrying capacity settings.

[0193] In another possible implementation, the preset grid carrying capacity can also be determined by: determining the upper limit of grid carrying capacity based on wire diameter specifications; monitoring the total grid load of the whole house; determining the remaining available power of the mains power supply module based on the total grid load of the whole house; and determining the preset grid carrying capacity based on the upper limit of grid carrying capacity and the remaining available power.

[0194] In practice, the upper limit of the grid capacity is determined based on the specifications of the incoming power line; the total grid load of the whole house is monitored in real time, and the remaining available power of the mains power supply module is obtained based on the total grid load of the whole house. The remaining available power represents the power resources that the water heater can currently occupy; the upper limit of the grid capacity is compared with the remaining available power.

[0195] If the upper limit of the grid capacity is greater than the remaining available power, the remaining available power is determined as the preset grid capacity corresponding to the current water heater; if the upper limit of the grid capacity is less than or equal to the remaining available power, the upper limit of the grid capacity is determined as the preset grid capacity corresponding to the current water heater.

[0196] Understandably, in scenarios where multiple devices share the same power line throughout the house, using cable diameter as a safety benchmark and dynamically adjusting the upper limit of the water heater's mains power based on the real-time load of other appliances can prevent multiple appliances from working simultaneously and causing circuit overload, thereby improving electrical safety.

[0197] The power allocation method provided in this embodiment monitors the current water flow and inlet water temperature of the multi-power instant water heater, as well as the power supply voltage of the mains power supply module and the battery status parameters of at least one set of battery modules; based on the set outlet water temperature, current water flow, and inlet water temperature, it determines the current power demand; when the power supply voltage and battery status parameters both meet the power supply conditions, and the current power demand exceeds the preset grid carrying capacity, it determines the power of the mains power supply module in joint power supply to be the preset grid carrying capacity; when the current power demand is greater than the preset grid carrying capacity but less than the first total power supply, it determines that at least one set of battery modules is in joint power supply. The power at any given time is the difference between the current demand power and the preset grid capacity. When the current demand power is greater than or equal to the first total power supply, the power of at least one battery module when jointly supplying power is determined to be the maximum output power of at least one battery module. When the supply voltage does not meet the power supply conditions but the battery status parameters meet the power supply conditions, the power of at least one battery module when supplying power is determined based on the current demand power. When the supply voltage meets the power supply conditions but the battery status parameters do not meet the power supply conditions, at least one battery module is controlled to enter standby or hibernation state, and the power of the mains power supply module when supplying power is determined based on the current demand power. This method realizes on-demand power allocation and multi-power source collaborative power supply in scenarios where grid capacity is limited or power supply fluctuates, thereby improving the power supply continuity, energy utilization efficiency, and outlet water temperature stability of instantaneous water heaters. It solves the problems of poor power supply continuity, insufficient temperature stability, and low energy utilization of instantaneous water heaters under complex power supply conditions, improves the continuous heating capacity of water heaters, improves the stability of outlet water temperature, increases energy utilization efficiency, and reduces the load pressure on the grid side.

[0198] Figure 3 A schematic diagram of the power distribution device provided in this application. Figure 3 As shown, this application provides a power distribution device 300, which includes:

[0199] The parameter monitoring module 301 is used to monitor the current water flow and inlet water temperature of the multi-power instant water heater, as well as the power supply voltage of the mains power supply module and the battery status parameters of at least one set of battery modules.

[0200] The power demand calculation module 302 is used to determine the current power demand based on the set outlet water temperature, the current water flow rate, and the inlet water temperature.

[0201] The power distribution module 303 is used to determine the power of the mains power supply module and at least one set of battery modules when the power supply voltage and battery status parameters meet the power supply conditions and the current power demand exceeds the preset grid carrying capacity, based on the current power demand.

[0202] The power distribution module 303 is specifically used to acquire the fluctuation parameters of the mains voltage and / or the battery operating parameters of at least one set of battery modules; determine the power supply coefficient of the mains power supply module and / or at least one set of battery modules based on the fluctuation parameters and / or battery operating parameters; determine the preset power upper limit of the mains power supply module and / or at least one set of battery modules, and correct the preset power upper limit based on the power supply coefficient; and determine the power of the mains power supply module and at least one set of battery modules when jointly supplying power based on the corrected preset power upper limit and the current power demand.

[0203] The power distribution device provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0204] Figure 4 A schematic diagram of the structure of the electronic device provided in this application. Figure 4 As shown, the electronic device 400 provided in this embodiment includes at least one processor 401 and a memory 402. Optionally, the device 400 further includes a communication component 403. The processor 401, memory 402, and communication component 403 are connected via a bus 404.

[0205] In a specific implementation, at least one processor 401 executes computer execution instructions stored in memory 402, causing at least one processor 401 to perform the above-described method.

[0206] The specific implementation process of processor 401 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0207] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0208] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0209] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0210] This application also provides a multi-power instantaneous water heater, including: a water heater body, a power distribution unit, a mains power supply module, and a battery module; the power distribution unit is configured to perform the method as described in the above embodiments.

[0211] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0212] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0213] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0214] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0215] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0216] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0217] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0218] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0219] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0220] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A power distribution method, characterized in that, The method, applicable to multi-power instantaneous water heaters, wherein the multi-power instantaneous water heater includes a mains power supply module and at least one battery module, comprises: Monitor the current water flow and inlet water temperature of the multi-power instant water heater, as well as the power supply voltage of the mains power supply module and the battery status parameters of the at least one set of battery modules; The current power demand is determined based on the set outlet water temperature, the current water flow rate, and the inlet water temperature. When the power supply voltage and the battery status parameters both meet the power supply conditions, and the current power demand exceeds the preset grid carrying capacity, the power of the mains power supply module and the at least one set of battery modules when jointly supplying power is determined based on the current power demand. Determining the power output of the mains power supply module and the at least one set of battery modules when jointly supplying power based on the current power demand includes: Obtain the fluctuation parameters of the mains voltage, and / or the battery operating parameters of the at least one set of battery modules; Based on the fluctuation parameters and / or the battery operating parameters, determine the power supply coefficient of the mains power supply module and / or the at least one set of battery modules; Determine the preset power limit of the mains power supply module and / or the at least one set of battery modules, and correct the preset power limit based on the power supply coefficient; Based on the revised preset power limit and the current power demand, the power of the mains power supply module and the at least one set of battery modules when jointly supplying power is determined.

2. The method according to claim 1, characterized in that, Determining the power output of the mains power supply module and the at least one set of battery modules when jointly supplying power based on the current power demand includes: The power of the mains power supply module during combined power supply is determined to be the preset grid carrying capacity. When the current power demand is greater than the preset grid carrying capacity and less than the first total power supply, the power of the at least one set of battery modules when jointly supplying power is determined to be the difference between the current power demand and the preset grid carrying capacity; the first total power supply is the sum of the preset grid carrying capacity and the maximum output power of the at least one set of battery modules. When the current power demand is greater than or equal to the first total power supply, the power of the at least one group of battery modules when jointly supplying power is determined to be the maximum output power of the at least one group of battery modules.

3. The method according to claim 1, characterized in that, Determining the power supply coefficient of the mains power supply module and / or the at least one set of battery modules based on the fluctuation parameters and / or the battery operating parameters includes: When the fluctuation parameter meets the first triggering condition, the first power supply coefficient of the mains power supply module is determined based on the fluctuation parameter. When the battery operating parameters meet the second trigger condition, a second power supply coefficient for the at least one set of battery modules is determined based on the battery operating parameters.

4. The method according to claim 3, characterized in that, The preset power limit includes a first preset power limit; The step of correcting the preset power limit based on the power supply coefficient, and determining the power of the mains power supply module and the at least one set of battery modules when jointly supplying power based on the corrected preset power limit and the current power demand, includes: Based on the first power supply coefficient, the first preset power limit of the mains power supply module is corrected; The power of the mains power supply module during combined power supply is determined to be the corrected first preset power limit. When the current power demand is greater than the modified first preset power limit, the power of the at least one group of battery modules when jointly supplying power is determined based on the difference between the current power demand and the modified first preset power limit.

5. The method according to claim 3, characterized in that, The preset power limit also includes a second preset power limit; the step of correcting the preset power limit based on the power supply coefficient, and determining the power of the mains power supply module and the at least one set of battery modules when jointly supplying power based on the corrected preset power limit and the current power demand, includes: Based on the second power supply coefficient, the second preset power limit of the at least one set of battery modules is corrected; The power of the mains power supply module during combined power supply is determined to be the preset grid carrying capacity. When the current power demand is greater than the preset grid carrying capacity and less than the second total power supply, the power of the at least one group of battery modules when jointly supplying power is determined to be the difference between the current power demand and the preset grid carrying capacity; the second total power supply is the sum of the preset grid carrying capacity and the corrected second preset power upper limit; When the current power demand is greater than or equal to the second total power supply, the power of the at least one group of battery modules when jointly supplying power is determined to be the modified second preset power limit.

6. The method according to any one of claims 1-5, characterized in that, The method further includes: When the supply voltage does not meet the supply conditions but the battery status parameters meet the supply conditions, the power of the at least one set of battery modules during power supply is determined based on the current power demand; or, When the power supply voltage meets the power supply conditions but the battery status parameters do not meet the power supply conditions, the at least one set of battery modules is controlled to enter a standby state or a hibernation state, and the power of the mains power supply module when supplying power is determined based on the current power demand.

7. The method according to claim 6, characterized in that, Determining the power output of the mains power supply module when supplying power based on the current power demand includes: If the current power demand is less than the preset grid carrying capacity, then the power of the mains power supply module when supplying power is determined to be the current power demand, and the mains power supply module is controlled to supply power to the at least one group of battery modules according to the difference power. Wherein, the differential power is the difference between the preset grid carrying capacity and the current demand power.

8. The method according to claim 7, characterized in that, The method further includes: After the battery status parameters of at least one group of battery modules meet the power supply conditions, the standby or dormant state of the at least one group of battery modules is released so that they can be jointly powered by the mains power supply module.

9. The method according to any one of claims 1-5, characterized in that, The method further includes: Obtain the identification information of the multi-power instantaneous water heater; The wire diameter specification of the multi-power instantaneous water heater is determined from a preset correspondence based on the identification information. Based on the wire diameter specification, the preset power grid carrying capacity is determined.

10. A multi-power instantaneous water heater, characterized in that, include: Water heater body, power distribution unit, mains power supply module and battery module; The power distribution unit is configured to perform the method as described in any one of claims 1-9.

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