Temperature control method and system for household energy storage power supply device

Abstract

The invention provides a temperature control method and system for a household energy storage power supply device, and belongs to the technical field of energy storage equipment. The system comprises a central control unit, a charging unit, a discharging unit, a temperature detection unit and a phase change unit, the method comprises the following steps: a temperature detection unit continuously detects working temperatures of a charging unit and a discharging unit, and sends a detected working temperature sequence value to a central control unit; and the central control unit controls the phase change unit to move between the charging unit and the discharging unit based on the working temperature sequence value and an environment temperature forecast value obtained in advance. The phase change unit is creatively introduced into the household energy storage power supply device, and dynamic position adjustment of the phase change unit is realized based on temperature detection, so that the household energy storage power supply device can adaptively realize charging and discharging efficiency maximization.

Description

Technical Field

[0001] This invention belongs to the field of energy storage equipment technology, and particularly relates to a temperature control method and system for a household energy storage power device, an electronic device for implementing the method, a computer program product, and a computer-readable storage medium. Background Technology

[0002] A home energy storage power supply device is an electrical energy storage device used in homes. It can store electrical energy when electricity is abundant or prices are low, and release the energy when needed to meet household electricity demand. Home energy storage power supply devices typically also include renewable energy storage devices, which can generate and store electricity using renewable energy sources (including but not limited to solar and wind power). The electricity generated (converted) from renewable energy sources is utilized through a charging and discharging process. Taking a home solar energy storage device as an example, it is an integrated device combining solar power generation and energy storage systems. It can collect, store, and flexibly utilize solar energy, significantly improving household energy self-sufficiency and electricity stability. For example, Chinese invention patent CN115589074B proposes a solar-based home energy storage power supply system, and Chinese invention patent application CN202510279604 also proposes a home intelligent photovoltaic system based on lithium battery energy storage.

[0003] Studies have found that the charging and discharging power of energy storage devices (such as lithium batteries, lead-acid batteries, and solar cell arrays) is closely related to temperature. Temperature affects the power performance by influencing the rate of internal chemical reactions, electrolyte conductivity, and material stability. Typically, charging and discharging power are significantly limited in low-temperature (e.g., <0℃) and high-temperature (e.g., >40℃) environments. For example, fast charging at low temperatures may lead to permanent capacity decay or thermal runaway (especially in lithium batteries), while continuous high-temperature charging will significantly shorten battery cycle life and may even trigger thermal runaway. Discharge power will also decrease significantly or even be forced to stop discharging in low-temperature and high-temperature environments. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention proposes a temperature control method and system for a home energy storage power device, an electronic device for implementing the method, a computer program product, and a computer-readable storage medium.

[0005] In a first aspect of the invention, a temperature control method for a home energy storage power device is provided. The home energy storage power device includes a central control unit, a charging unit, a discharging unit, and a temperature detection unit. The home energy storage power device also includes a phase change unit that is movable between the charging unit side and the discharging unit side. Specifically, the method includes: The temperature detection unit continuously detects the operating temperature of the charging unit and the discharging unit, and sends the detected operating temperature sequence values ​​to the central control unit. The central control unit controls the phase change unit to move between the charging unit and the discharging unit based on the operating temperature sequence value and the pre-acquired ambient temperature forecast value.

[0006] When the method begins to be executed, the central control unit determines the initial position of the phase change unit based on the pre-acquired ambient temperature forecast value.

[0007] After the method begins execution, the central control unit predicts the operating temperature of the charging unit and the discharging unit at least one future moment based on the operating temperature sequence value, and controls the phase change unit to move between the charging unit and the discharging unit based on the predicted operating temperature value and the predicted ambient temperature value.

[0008] The home energy storage power supply device is also connected to a home energy storage unit and multiple home load units; The method further includes: Obtain the first ambient temperature of the home energy storage unit and the second ambient temperature of the target home load unit; When the first ambient temperature and / or the second ambient temperature do not meet the preset conditions, a temperature control strategy is activated, which ensures that the first ambient temperature and / or the second ambient temperature meet the preset conditions. The target household load unit is one or more of the plurality of household load units; The target home load unit and the home energy storage unit are located in different, isolated environmental spaces.

[0009] When the first ambient temperature and / or the second ambient temperature do not meet the preset conditions, a temperature control strategy is activated, specifically including: When the absolute value of the difference between the first ambient temperature and the second ambient temperature is greater than a preset threshold, a temperature control strategy is activated, wherein the temperature control strategy makes the absolute value of the difference between the first ambient temperature and the second ambient temperature less than the preset threshold.

[0010] The plurality of household load units include ambient temperature control devices; the household energy storage unit includes a solar energy storage unit.

[0011] The home energy storage power device also includes a first temperature sensor configured in the home energy storage unit; The first ambient temperature of the home energy storage unit is obtained through the first temperature sensor; When the first ambient temperature is lower than a preset low threshold, the associated household load unit is activated, wherein the associated household load unit is one or more of the plurality of household load units; The associated home load unit and the home energy storage unit are located in the same environmental space.

[0012] In a second aspect of the invention, a temperature control system for a home energy storage power device is provided, the temperature control system for the home energy storage power device including a central control unit, a charging unit, a discharging unit, a temperature detection unit, and a phase change unit; The temperature detection unit continuously detects the operating temperature of the charging unit and the discharging unit, and sends the detected operating temperature sequence values ​​to the central control unit; The central control unit predicts the operating temperature of the charging unit and the discharging unit at least one future moment based on the operating temperature sequence value in real time, and controls the phase change unit to move between the charging unit and the discharging unit based on the predicted operating temperature value and the ambient temperature forecast value.

[0013] The home energy storage power device is also connected to a home energy storage unit and multiple home load units; the multiple home load units include ambient temperature control devices; the home energy storage unit includes a solar energy storage unit; the multiple home load units also include smart home appliances, the start / stop time periods and operating power of the smart home appliances can be pre-configured.

[0014] In a third aspect of the invention, a computer-readable storage medium is also provided, on which computer-executable program instructions are stored, wherein when the instructions are executed by a central processing unit, the temperature control method of a home energy storage power device described in the first aspect is implemented.

[0015] In a fourth aspect of the invention, an electronic device is also provided, the electronic device comprising a processor and a memory, the memory storing a computer program that, when executed by the processor, implements all or part of the steps of the temperature control method for a home energy storage power device described in the first aspect.

[0016] In a fifth aspect of the invention, a computer program product is also provided, which, when imported into and executed by an electronic device containing a processor, implements the temperature control method for a home energy storage power device described in the first aspect.

[0017] This invention innovatively introduces a phase change unit into a home energy storage power device and realizes dynamic position adjustment of the phase change unit based on temperature detection, thereby enabling the home energy storage power device to adaptively maximize charging and discharging efficiency. Its specific advantages and implementation principle will be further detailed in the specific embodiments section in conjunction with the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the main flow of a temperature control method for a household energy storage power device according to an embodiment of the present invention; Figure 2 yes Figure 1 The method involves related hardware and a schematic diagram of the data interaction process. Figure 3 This is a schematic diagram of the functional unit composition of the temperature control of a household energy storage power device according to an embodiment of the present invention; Figure 4 yes Figure 3 The diagram illustrates the data interaction and control between the various functional units of the system. Detailed Implementation

[0020] In the specific embodiments of this application, if the embodiments of the relevant technical solutions involve user-related data, then when the embodiments of this application are applied to specific products or technologies, user permission or consent is required, and the collection, use and processing of the relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0021] Before introducing the specific implementation methods of this application, the prior art related to this application is first introduced, and the technical solution framework of this application is initially introduced, which leads to the improvement motivation of the specific technical solution of this application, so as to better understand the inventiveness of this application.

[0022] Home energy storage devices in the general sense include ordinary energy storage devices and new energy energy storage devices, both of which include charging units and discharging units.

[0023] Ordinary energy storage devices generally refer to energy storage equipment that does not involve an energy conversion process; they merely transfer and store electrical energy, such as power banks, emergency chargers, and emergency charging battery packs. They can store mains electricity during off-peak hours (when electricity demand is low) and discharge it to power loads when necessary (due to mains power failures, peak / off-peak periods, or in the field). In this scenario, a home energy storage power supply can be simply understood as consisting of a "charging port + battery pack + discharging port," and its safety depends on the battery type, battery capacity, and battery SOC control strategy.

[0024] New energy storage devices broadly refer to energy storage equipment that involves an energy conversion process. These devices can convert external green renewable energy (such as wind, solar, and tidal energy, but for most residential environments, it's primarily solar energy) into electrical energy for storage and use by household loads. They can even be connected to the public power grid for trading. In this scenario, the composition of a residential energy storage device is relatively complex. Taking a residential solar energy storage device as an example, it typically includes a charging unit, a charging management system, a discharging management system, a discharging unit, and corresponding safety management units.

[0025] Unlike ordinary energy storage devices, which typically separate the charging and discharging phases (e.g., charging at home and using in the wild), home-use new energy storage devices can have their charging and discharging phases separated or not. For example, they can charge first and then discharge, or charge and discharge simultaneously.

[0026] Whether it's a conventional energy storage device or a home-use new energy storage device, its charging and discharging power is closely related to temperature. Temperature affects the power performance by influencing the rate of internal chemical reactions, electrolyte conductivity, and material stability. Typically, charging and discharging power are significantly limited in low-temperature (e.g., <0℃) and high-temperature (e.g., >40℃) environments. For example, fast charging at low temperatures may lead to permanent capacity decay or thermal runaway (especially for lithium batteries), while continuous high-temperature charging will significantly shorten battery cycle life and may even trigger thermal runaway. Discharge power will also decrease significantly in low-temperature environments and may even force the discharge to be interrupted.

[0027] For ordinary energy storage devices, especially portable ones, the effects of temperature can be adjusted by changing the external environment. For example, charging can be done in a place with a suitable temperature. If the ambient temperature is not suitable when discharging, the battery pack can be preheated before discharging.

[0028] However, for residential renewable energy storage devices, which are typically stationary and, due to energy extraction restrictions, must be installed outdoors (e.g., solar photovoltaic panels), the aforementioned temperature regulation methods cannot be used. In existing technologies, corresponding temperature management systems typically minimize the impact of temperature by additionally configuring heating systems (for heating at low temperatures) and cooling systems (for cooling at high temperatures).

[0029] However, the additional temperature control system increases the complexity of the system, and the temperature control system itself also requires an electrical power supply, which may eliminate the economic value of utilizing new energy sources overall.

[0030] Therefore, this application proposes an improved technical solution.

[0031] First see Figure 1 , Figure 1 This is a schematic diagram of the main flow of a temperature control method for a household energy storage power device according to an embodiment of the present invention.

[0032] The home energy storage power supply device includes a central control unit, a charging unit, a discharging unit, and a temperature detection unit.

[0033] As one of the most important improvements of the present invention, the home energy storage power device further includes a phase change unit that is movable on the charging unit side and the discharging unit side.

[0034] The method includes: The temperature detection unit continuously detects the operating temperature of the charging unit and the discharging unit, and sends the detected operating temperature sequence values ​​to the central control unit; The central control unit controls the phase change unit to move between the charging unit and the discharging unit based on the operating temperature sequence value and the pre-acquired ambient temperature forecast value.

[0035] This invention innovatively introduces a phase change unit into a home energy storage power device and realizes dynamic position adjustment of the phase change unit based on temperature detection, thereby enabling the home energy storage power device to adaptively maximize charging and discharging efficiency.

[0036] Specifically, the home energy storage power device of the present invention is preferably used in the aforementioned home new energy storage device, especially the home solar photovoltaic energy storage device.

[0037] The technical solution of this application relates to a household solar photovoltaic energy storage device, which is a key device for realizing the efficient utilization of household solar energy. It can convert solar energy into electrical energy and store it to provide power to the household when needed, effectively improving energy utilization efficiency and power supply stability. It mainly consists of three core parts: a discharge unit, a charging unit, and a battery pack. These parts work together to realize the conversion, storage, and release of electrical energy.

[0038] The main function of the charging unit is to convert the direct current generated by the solar photovoltaic panels, or, when necessary, the alternating current from the grid, into electrical energy suitable for battery storage, thus achieving efficient energy storage. A charging unit typically includes a solar charge controller, input switching and protection circuitry, and an optional grid charging module.

[0039] A solar charge controller manages the power output of solar photovoltaic (PV) panels. It features Maximum Power Point Tracking (MPPT) capability, enabling real-time monitoring of the PV panel's output voltage and current. This allows the controller to automatically adjust the operating point, ensuring the PV panel always operates near its maximum power point, thereby maximizing solar energy conversion efficiency. The solar charge controller also provides intelligent charging management for the battery pack. Based on the battery's state (e.g., State of Charge (SOC) and State of Health (SOH), it automatically adjusts the charging voltage and current, employing different charging strategies such as constant current charging, constant voltage charging, and float charging to prevent overcharging and undercharging, effectively extending the battery pack's lifespan.

[0040] To enhance the flexibility and practicality of home solar energy storage devices, optional configurations include a grid charging module. When solar energy is insufficient to meet household electricity and battery charging needs, the grid charging module converts AC power from the grid into DC power suitable for charging the battery pack. This module supports charging during off-peak electricity pricing periods, allowing users to set charging time and amount via the device's control system, utilizing cheaper electricity to charge the battery pack and reduce electricity costs. Simultaneously, the grid charging module also features comprehensive protection functions, such as overvoltage protection, undervoltage protection, and overcurrent protection, ensuring the safety of the battery pack and the device itself in cases of grid instability or abnormalities.

[0041] The input switching and protection circuit manages the switching between solar photovoltaic panels and grid power input, and provides safety protection for the input power. When the solar photovoltaic panels generate sufficient power, the circuit automatically directs the power to charge the battery pack; when solar energy is insufficient or at night, the circuit can switch to grid charging mode according to a preset program. Furthermore, the protection circuit can detect overvoltage, undervoltage, and short circuit faults in the input power. Once an abnormality is detected, the input is immediately cut off to prevent damage to the charging unit and battery pack, ensuring the safe and stable operation of the entire device.

[0042] Battery packs are key components in home solar energy storage devices, directly impacting the device's storage capacity, power supply time, and lifespan. Commonly used battery types in home solar energy storage devices include lithium-ion batteries and lead-acid batteries. Lithium-ion batteries offer advantages such as high energy density, long cycle life, low self-discharge rate, and no memory effect. Lithium iron phosphate batteries, in particular, offer high safety and good high-temperature resistance, making them widely used in home energy storage. Ternary lithium batteries have even higher energy density but require stricter temperature and management controls. Lead-acid batteries are less expensive and technologically mature, but they suffer from low energy density, large size, heavy weight, require regular maintenance, and have a shorter cycle life. With the development of lithium-ion battery technology, the use of lead-acid batteries in home energy storage is gradually decreasing.

[0043] Battery packs are typically composed of multiple battery cells connected in series, parallel, or series-parallel configurations. Series connection increases the output voltage of the battery pack, meeting the voltage requirements of devices such as inverters; parallel connection increases the capacity of the battery pack, enhancing the energy storage capacity of the energy storage device. To ensure the performance and lifespan of the battery pack, each battery cell requires rigorous screening and matching to ensure that its voltage, capacity, internal resistance, and other parameters are as consistent as possible. Battery packs are usually equipped with a Battery Management System (BMS): the BMS acts as the "smart manager" of the battery pack. It collects the status information of the battery cells in real time through sensors distributed throughout the battery pack and transmits the data to the central control unit for analysis and processing. During charging, the BMS adjusts the charging current and voltage according to the status of the battery cells to prevent overcharging; during discharging, it monitors the voltage of the battery cells to avoid over-discharging. When voltage imbalances occur between battery cells, the BMS activates a balancing function, actively or passively balancing the charge of each cell to ensure the stability of the overall performance of the battery pack. In addition, the BMS also has fault diagnosis and alarm functions. When an abnormal situation is detected in the battery pack, such as overheating or short circuit, it will immediately issue an alarm and take corresponding protective measures, such as cutting off the circuit, to prevent damage to the battery pack or even safety accidents.

[0044] The discharge unit is the core module that converts the electrical energy stored in the battery pack into AC power usable by household appliances, ensuring their stable and safe operation. The inverter is the core component of the discharge unit; its main function is to convert the direct current (DC) output from the battery pack into AC power (AC) that meets household electricity standards, such as the common 220V / 50Hz or 110V / 60Hz AC. The inverter's conversion efficiency is a crucial performance indicator; high-efficiency inverters typically achieve efficiencies of over 90%, meaning they can convert more battery energy into usable AC power and reduce energy loss. The output control module monitors and regulates the AC output from the inverter, ensuring the stability and safety of the output power. It monitors parameters such as output voltage, current, and frequency in real time. When abnormalities are detected, such as excessively high or low voltage or current overload, it immediately takes protective measures, cutting off the output or adjusting output parameters to prevent damage to appliances due to abnormal power. Furthermore, the output control module can dynamically adjust the output power according to the actual needs of household appliances, achieving a reasonable distribution of electrical energy. The output interface serves as a bridge connecting the discharge unit to household electrical appliances. Common output interfaces include standard sockets, USB interfaces, and DC output ports. This diverse range of output interfaces allows home solar energy storage devices to meet the power needs of various household appliances, enhancing the device's practicality and versatility.

[0045] Based on the above description, the household solar photovoltaic energy storage device of the present invention includes a charging unit, a battery pack, and a discharging unit connected to each other. It can be understood that the charging unit is connected to the battery pack, and the battery pack is connected to the discharging unit. The main body of the charging unit is a solar photovoltaic panel, primarily located outdoors. The battery pack and discharging unit can be located outdoors or indoors, with the output interface of the discharging unit preferably located indoors. In actual arrangement, the charging unit, battery pack, and discharging unit can be located in different geographical locations or spaces (e.g., rooftops, balconies, living rooms, kitchens, rooms, etc.).

[0046] For ease of description, it is assumed that the charging unit is located in the first position, the battery pack is located in the second position, and the discharging unit is located in the third position. The following embodiments will be described using the charging unit in the first position, the battery pack in the second position, and the discharging unit in the third position as examples.

[0047] The most important technical means in the technical solution of this application will be introduced next, namely the phase change unit.

[0048] The core of a phase change unit is the phase change material (PCM). These materials undergo phase transitions with temperature changes, such as changing from solid to liquid (melting) or from liquid to solid (solidification), absorbing or releasing a large amount of latent heat during the process. Taking a common paraffin-based PCM as an example, when the ambient temperature rises to its melting point, the paraffin absorbs heat and melts from solid to liquid, storing the heat as latent heat. When the ambient temperature drops to its freezing point, the liquid paraffin releases heat and re-solidifies, releasing the stored heat. Through this reversible phase change process, the PCM achieves efficient heat storage and release, and the material temperature remains essentially constant during the phase change, maintaining a stable thermal environment.

[0049] Regarding the application of phase change units in solar energy storage systems, existing technologies have yielded relevant research. For example, reference 1 (Liu Shulan. Numerical simulation study on phase change thermal storage of graphite foam-reinforced eutectic salt [D]. Zhengzhou University, 2012. DOI:10.7666 / d.y2101105.), reference 2 (Liu Wei, Zhou Zhihua, Guo Weixing, et al. Experimental study on thermal storage performance of solar water heating system with plastic ball encapsulated phase change material [J]. Building Energy Conservation, 2018, 46(7):4. DOI:10.3969 / j.issn.1673-7237.2018.07.029.), reference 3 (Rongrong Luo et al.; High energy storage density titaniumnitride-pentaerythritol solid–solid composite phase change materials for light-thermal-electric conversion, "Applied Energy", Literature such as Volume 331 (2023, 120377) has demonstrated that the use of phase change materials (PCMs) in solar energy storage systems can effectively improve performance.

[0050] However, while phase change materials (PCMs) offer significant advantages in solar energy storage, their cost and acquisition challenges limit their large-scale application, especially in residential energy storage scenarios where deployment and operating costs are often a core consideration for users. The aforementioned literature describes static phase change schemes where the phase change unit operates in a single, static state, unable to adapt to temperature variations across different units within the system.

[0051] Therefore, the technical solution of this application is proposed. The technical solution of this application creatively introduces a phase change unit into a home energy storage power device and realizes dynamic position adjustment of the phase change unit based on temperature detection. The phase change unit can move on the charging unit side and the discharging unit side, thereby minimizing the amount of phase change material used while improving efficiency.

[0052] Next, combined Figure 2 The technical solution of this application will be further described below.

[0053] The temperature detection unit continuously detects the operating temperature of the charging unit, the battery pack unit, and the discharging unit, and sends the detected operating temperature sequence values ​​to the central control unit. Further, see Figure 2The central control unit continuously acquires the operating temperature sequence values ​​of the charging unit and the discharging unit, and then predicts the predicted operating temperatures of the charging unit and the discharging unit. In other words, the technical solution of this application is to perform temperature control based on temperature prediction, that is, to predict the operating temperature at a future point in time (e.g., the next prediction time, e.g., 15 minutes later) based on the currently obtained operating temperature sequence values. In actual execution, the central control unit predicts the operating temperature of the charging unit and the discharging unit at least one future time in real time based on the operating temperature sequence values.

[0054] Preferably, the continuous monitoring process also includes continuously acquiring the operating temperature sequence values ​​of the battery pack cells, and then predicting the predicted operating temperature values ​​of the battery pack cells. Then, based on the predicted operating temperature and the forecast ambient temperature, the central control unit controls the phase change unit to move between the charging unit and the discharging unit (the battery pack unit may be located between the two).

[0055] For example, when the temperature of the charging or discharging unit is too high or too low, the phase change unit can be moved closer to itself. It is important to note that the determination of whether the temperature is too high or too low is not based on a single factor, but rather on a combination of the predicted ambient temperature, in order to avoid frequently repositioning the phase change unit.

[0056] For example, in one scenario, the predicted operating temperature of the charging unit will reach 39°C, which is very likely to exceed 40°C, but the predicted ambient temperature may be 5-10°C. In this case, the difference between the predicted operating temperature and the predicted ambient temperature is large (greater than a preset threshold), and the phase change unit can be temporarily not moved towards the charging unit, because the higher temperature of the charging unit may gradually decrease with the natural heat exchange process of the environment. However, if the predicted ambient temperature is 25-30°C, the difference between the predicted operating temperature and the predicted ambient temperature is small (less than a preset threshold), and the phase change unit needs to be moved towards the charging unit, because the higher temperature of the charging unit may not gradually decrease with the natural heat exchange process of the environment.

[0057] It is understandable that different phase change materials have different phase change temperatures. The phase change temperature of a phase change material (PCM) is one of its core characteristics, referring to the temperature range during which the material undergoes a phase transition (such as solid to liquid, liquid to gas, or solid to solid phase transition).

[0058] In solar energy storage systems, the phase change materials used are primarily organic phase change materials. Organic phase change materials can be, for example, paraffin-based materials, whose composition consists of straight-chain alkanes (such as C...). 12 H 26 To C32 H 66 The phase change temperature is approximately -5℃ to 80℃ (increasing with increasing carbon chain length). Preferably, the phase change unit is composed of straight-chain alkane phase change materials with a phase change temperature of -5℃ to 50℃.

[0059] The phase change unit can move along the spatial trajectory formed by the first, second, and third positions of the "charging unit-battery pack-discharging unit", thereby absorbing or releasing heat based on its own phase transition, adjusting the ambient temperature near each of the "charging unit-battery pack-discharging unit", and thus ensuring that the "charging unit-battery pack-discharging unit" itself operates in a suitable temperature environment as much as possible.

[0060] In practical implementation, the phase change unit, as a movable thermal management module, exchanges heat with the charging unit, battery pack, and discharging unit through positional movement.

[0061] If the operating temperature sequence value or the operating temperature prediction value (the real-time monitored temperature of the charging unit / battery pack / discharging unit) is higher than the threshold, and the ambient temperature forecast value shows that the high temperature will continue, the central control unit can instruct the phase change unit to move to the vicinity of the charging unit / battery pack / discharging unit to reduce the temperature of the charging unit / battery pack / discharging unit through phase change heat absorption. If the temperature is too low, the phase change unit can be moved to the vicinity of the discharge unit (such as the charging unit / battery pack / discharge unit) to use the phase change heat release to maintain the charging unit / battery pack / discharge unit of the energy storage device at a suitable operating temperature.

[0062] In terms of the specific mobile architecture, the technical solution of this application designs a lightweight, low-power mobile device (such as a linear guide rail, gear transmission, etc.) to ensure that the phase change unit can be quickly positioned in a limited space without affecting the overall structural strength of the photovoltaic system. In addition, the phase change material needs to be encapsulated in a container during the movement to avoid leakage or wear. The encapsulation container can be opened after reaching the designated position. At the same time, after reaching the designated position, the position and contact area of ​​the phase change unit are optimized according to the heat generation and heat flow direction of the charging unit / battery pack / discharging unit to avoid ineffective heat exchange.

[0063] It's understandable that home solar energy storage devices typically separate the charging and discharging processes, for example, charging during the day and discharging at night. In this separated scenario, temperature control conflicts usually don't arise. For instance, during charging, the phase change unit may only need to meet the temperature control requirements of the charging unit and the battery pack; that is, the phase change unit mainly moves towards or away from the charging unit, or stays near the battery pack to achieve heating or cooling. Similarly, during discharging, the phase change unit may only need to meet the temperature control requirements of the discharging unit and the battery pack; that is, the phase change unit mainly moves towards or away from the discharging unit, or stays near the battery pack to achieve heating or cooling.

[0064] However, there is also the possibility of parallel charging and discharging. In this case, a conflict may arise where both the charging and discharging units need to be cooled (heated) simultaneously. The central control unit may conclude that the phase change unit needs to move towards both the discharging and charging units while also considering the temperature regulation of the battery pack. In other words, the first, second, and third positions may all require temperature regulation at the same time, resulting in the overall system temperature being either too high or too low.

[0065] Although this situation is relatively rare (because existing energy storage systems are basically equipped with temperature preheating / precooling systems, which are used to preheat / precool before starting), as a supplement to the technical solution of the present invention, in response to the above situation, the central control unit can control the phase change unit to stay and move alternately between the charging unit, the battery pack and the discharging unit. For example, after staying in the first position for 5 minutes, after releasing (absorbing) the heat of the phase change unit, it moves to the second position and stays there for 5 minutes.

[0066] Based on the above description, preferred embodiments of the method of this application can be summarized as follows: A temperature control method for a home energy storage power device, the home energy storage power device including a central control unit, a charging unit, a battery pack, a discharging unit, and a temperature detection unit, the home energy storage power device also including a phase change unit. The phase change unit is movable on the charging unit side, the battery pack side, and the discharging unit side, and the method includes: The temperature detection unit continuously detects the operating temperature of the charging unit, the battery pack, and the discharging unit, and sends the detected operating temperature sequence values ​​to the central control unit; The central control unit controls the phase change unit to move between the charging unit, the battery pack, and the discharging unit based on the operating temperature sequence value and the pre-acquired ambient temperature forecast value.

[0067] Of course, after the system is started, the central control unit determines the initial position of the phase change unit based on the pre-acquired ambient temperature forecast value, and then begins the aforementioned position adjustment.

[0068] In implementing the technical solution of this application, since an additional movement control device for the phase change unit is introduced, additional energy consumption is also introduced. Therefore, the process of the movement control device controlling the phase change unit to move on the relevant track, closing / opening the container, adjusting the position and direction all require electrical energy. Therefore, it is also necessary to consider the ratio between efficiency improvement and additional energy consumption.

[0069] Practical testing has shown that, due to the use of lightweight, low-power moving devices (such as linear guides and gear transmissions) in the technical solution of this application, the phase change unit can be quickly positioned and adjusted within a limited space, and the additional power consumed in the related movement control process can be controlled to between 0.5% and 1% of the total system power consumption. Furthermore, by applying the above-mentioned improved solution of this invention, the system's charging / discharging efficiency is increased by more than 25%, and the resulting safety improvements are even more significant, while also extending the overall lifespan of the system.

[0070] Therefore, the efficiency improvement brought about by the temperature control method of introducing phase change units can offset the electrical energy consumed to drive the phase change units to move. Overall, it balances efficiency and cost and achieves the beneficial effect of improvement.

[0071] As a further preferred embodiment, the home energy storage power device is also connected to a home energy storage unit and multiple home load units; The method further includes: Obtain the first ambient temperature of the home energy storage unit and the second ambient temperature of the target home load unit; When the first ambient temperature and / or the second ambient temperature do not meet the preset conditions, a temperature control strategy is activated, which ensures that the first ambient temperature and / or the second ambient temperature meet the preset conditions. The target household load unit is one or more of the plurality of household load units; The target home load unit and the home energy storage unit are located in different, isolated environmental spaces.

[0072] Preferably, the plurality of household load units include an ambient temperature control device; the household energy storage unit includes a solar energy storage unit.

[0073] When the first ambient temperature and / or the second ambient temperature do not meet the preset conditions, a temperature control strategy is activated, specifically including: When the absolute value of the difference between the first ambient temperature and the second ambient temperature is greater than a preset threshold, a temperature control strategy is activated, wherein the temperature control strategy makes the absolute value of the difference between the first ambient temperature and the second ambient temperature less than the preset threshold.

[0074] The home energy storage power device also includes a first temperature sensor configured in the home energy storage unit; The first ambient temperature of the home energy storage unit is obtained through the first temperature sensor; When the first ambient temperature is lower than a preset low threshold, the associated household load unit is activated, wherein the associated household load unit is one or more of the plurality of household load units; The associated home load unit and the home energy storage unit are located in the same environmental space.

[0075] The above preferred embodiments embody improved embodiments using an additional preheating / precooling conditioning system to further avoid the conflicting situations described in the foregoing embodiments.

[0076] Specifically, a home energy storage unit can be a solar energy storage unit, such as a photovoltaic cell module, and multiple home load units can be temperature control devices, such as home air conditioners or temperature exchangers; When the target household load unit and the household energy storage unit are located in different, isolated environmental spaces, for example, the target household load unit is located indoors (e.g., a discharge unit, the output port of the discharge unit is located indoors), and the household energy storage unit is located outdoors, when the outdoor ambient temperature and / or the indoor ambient temperature do not meet the preset conditions, a temperature control strategy is activated, the temperature control strategy making the first ambient temperature and / or the second ambient temperature meet the preset conditions.

[0077] Specifically, the indoor ambient temperature can be controlled and adjusted by a temperature regulating device, while the outdoor ambient temperature can be adjusted by activating a locally placed temperature exchanger.

[0078] More specifically, when the first ambient temperature and / or the second ambient temperature do not meet the preset conditions, a temperature control strategy is activated, specifically including: When the absolute value of the difference between the first ambient temperature and the second ambient temperature is greater than a preset threshold, a temperature control strategy is activated, wherein the temperature control strategy makes the absolute value of the difference between the first ambient temperature and the second ambient temperature less than the preset threshold.

[0079] The multiple household load units also include smart home appliances, whose start / stop periods and operating power can be pre-configured.

[0080] Alternatively, the home energy storage power device may also include a first temperature sensor disposed in the home energy storage unit; The first ambient temperature of the home energy storage unit is obtained through the first temperature sensor; When the first ambient temperature is lower than a preset low threshold, the associated household load unit is activated, wherein the associated household load unit is one or more of the plurality of household load units; The associated home load unit and the home energy storage unit are located in the same environmental space; in this case, it can be understood that the associated home load unit (discharge unit, smart home appliances connected to the output port of the discharge unit) and the home energy storage unit (solar energy storage unit, such as photovoltaic cell array) are both located indoors or both located outdoors. In this case, the smart home appliances can be preheated based on mains power or other pre-stored energy, thereby increasing the overall operating temperature of the system.

[0081] Based on the method implementation examples, see below. Figure 3 and Figure 4 A system implementation example.

[0082] Figure 3 A temperature control system for a home energy storage power device is shown, the temperature control system of which includes a central control unit, a charging unit, a battery pack, a discharging unit, a temperature detection unit, and a phase change unit; The temperature detection unit continuously detects the operating temperature of the charging unit and the discharging unit, and sends the detected operating temperature sequence values ​​to the central control unit; The central control unit predicts the operating temperature of the charging unit and the discharging unit at least one future moment based on the operating temperature sequence value in real time, and controls the phase change unit to move between the charging unit, the battery pack and the discharging unit based on the predicted operating temperature value and the ambient temperature forecast value.

[0083] The home energy storage power device is also connected to a home energy storage unit and multiple home load units; the multiple home load units include ambient temperature control devices; the home energy storage unit includes a solar energy storage unit; the multiple home load units also include smart home appliances, the start / stop time periods and operating power of the smart home appliances can be pre-configured.

[0084] Figure 4 yes Figure 3 The diagram illustrates the data interaction and control between the various functional units of the system.

[0085] exist Figure 4In this embodiment, the central control unit of the system is further shown to be connected to a temperature sensor (for obtaining the operating temperatures of the charging unit, battery pack, and discharging unit), a meteorological data interface (for obtaining ambient temperature forecast values), and a moving structure drive module (for adjusting the position of the phase change unit). The moving structure drive module adjusts the position of the phase change unit via a moving track, with the phase change unit positioned between the charging unit side and the discharging unit side (passing through the battery pack). Various smart home appliance loads are connected through the discharging unit. The smart home appliance loads can be connected to mains power to perform corresponding preheating / precooling operations.

[0086] Although not shown in the accompanying drawings, preferred and more common product embodiments may also be an electronic device, particularly a terminal electronic device, comprising: a memory and one or more processors. The memory stores one or more application programs adapted to be executed by the one or more processors to implement the aforementioned temperature control method for a home energy storage power device.

[0087] Although not shown in the accompanying drawings, more embodiments also include a computer medium storing a computer program that, when executed, implements all or part of the steps of the aforementioned temperature control method for a home energy storage power device.

[0088] It is understood that the system, product, equipment, and media implementation examples and method implementations correspond to each other and can be referenced by each other, and their principles are similar or the same, so they will not be elaborated again.

[0089] Other technologies, principles, algorithms, or models not elaborated in detail in this application can be found in the prior art.

[0090] In summary, this invention innovatively introduces a phase change unit into a home energy storage power device and achieves dynamic position adjustment of the phase change unit based on temperature detection. This enables the home energy storage power device to adaptively maximize charging and discharging efficiency and control the deployment cost of the home solar energy storage power device.

[0091] The foregoing has shown and described the method embodiments and systems of the present invention, but it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temperature control method of a home energy storage power supply device including a central control unit, a charging unit, a discharging unit, and a temperature detection unit, characterized by, The method further comprises: The temperature detection unit continuously detects the working temperature of the charging unit and the discharging unit, and sends the detected working temperature sequence value to the central control unit; The central control unit controls the phase change unit to move between the charging unit and the discharging unit based on the working temperature sequence value and the pre-acquired environmental temperature prediction value.

2. The temperature control method of the household energy storage power supply device according to claim 1, wherein: The central control unit determines the initial position of the phase change unit according to the pre-acquired environmental temperature prediction value.

3. The temperature control method of the household energy storage power supply device according to claim 1, wherein: The central control unit predicts the working temperature prediction value of the charging unit and the discharging unit at at least one future time point in real time based on the working temperature sequence value, and controls the phase change unit to move between the charging unit and the discharging unit based on the working temperature prediction value and the environmental temperature prediction value.

4. The temperature control method of a home energy storage power supply device according to claim 1, characterized by: The household energy storage power supply device is further connected to a household energy storage unit and a plurality of household load units; The method further comprises: acquiring a first environmental temperature of the household energy storage unit and a second environmental temperature of a target household load unit; when the first environmental temperature and / or the second environmental temperature do not meet a preset condition, starting a temperature control strategy, the temperature control strategy making the first environmental temperature and / or the second environmental temperature meet the preset condition, The target household load unit is one or more of the plurality of household load units; The target household load unit and the household energy storage unit are located in different mutually isolated environmental spaces.

5. The temperature control method of a domestic energy storage power supply device according to claim 4, characterized by: When the first environmental temperature and / or the second environmental temperature do not meet a preset condition, starting a temperature control strategy, specifically comprising: When the absolute value of the difference between the first environmental temperature and the second environmental temperature is greater than a preset threshold, starting a temperature control strategy, the temperature control strategy making the absolute value of the difference between the first environmental temperature and the second environmental temperature less than the preset threshold.

6. The temperature control method of a home energy storage power supply device according to claim 4, characterized by: The plurality of household load units include environmental temperature adjusting equipment; the household energy storage unit includes a solar energy storage unit.

7. The temperature control method of the household energy storage power supply device according to claim 4, wherein: The household energy storage power supply device further comprises a first temperature sensor arranged at the household energy storage unit; The first environmental temperature of the household energy storage unit is acquired by the first temperature sensor; When the first environmental temperature is lower than a preset low threshold, starting an associated household load unit, the associated household load unit being one or more of the plurality of household load units; The associated household load unit and the household energy storage unit are located in the same environmental space.

8. A temperature control system of a household energy storage power supply device, the temperature control system of the household energy storage power supply device comprising a central control unit, a charging unit, a discharging unit, a temperature detection unit, and a phase change unit; characterized in that: The temperature detection unit continuously detects the working temperature of the charging unit and the discharging unit, and sends the detected working temperature sequence value to the central control unit; The central control unit predicts the working temperature prediction value of the charging unit and the discharging unit at at least one future time based on the working temperature sequence value in real time, and controls the phase change unit to move between the charging unit and the discharging unit based on the working temperature prediction value and the environmental temperature prediction value.

9. A temperature control system for a domestic energy storage power supply device as claimed in claim 8, wherein: The household energy storage power supply device is further connected with a household energy storage unit and a plurality of household load units; the plurality of household load units include an environmental temperature adjusting device; the household energy storage unit includes a solar energy storage unit; the plurality of household load units further include intelligent household appliances, and the start-stop period and working power of the intelligent household appliances can be pre-configured. 10.A computer readable storage medium having computer executable program instructions stored thereon, when the instructions are executed by a central processing unit, a temperature control method of a household energy storage power supply device according to any one of claims 1-7 is implemented.

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