Standby power supply temperature control method and system of power distribution network and storage medium

Abstract

The embodiment of the invention provides a standby power supply temperature control method and system of a power distribution network and a storage medium. The method comprises the steps that the temperature of a first refrigerant located above a lithium battery module is obtained through a first temperature sensing unit; determining first heating power of a heating module according to the first refrigerant temperature and a preset temperature; refrigerant temperature differences of all positions in the height direction of the lithium battery module are obtained through a second temperature sensing unit; correcting the first heating power according to the refrigerant temperature difference and the first refrigerant temperature to obtain second heating power; and the heating module is controlled to heat the refrigerant located below the lithium battery module at the second heating power. When the standby power supply is started, the lithium battery module is preheated, and the internal resistance of the battery is reduced, so that the voltage difference of cold start is reduced, the low-voltage protection of the battery is prevented from being triggered, and the stable operation of related equipment is ensured.

Description

Technical Field

[0001] The present invention relates to, but is not limited to, the technical field of power energy storage, and particularly relates to a temperature control method, system and storage medium for a backup power supply of a distribution network. Background Art

[0002] In a distribution network, immersion batteries are widely used in various grid equipment, such as distribution transformers, reactive power compensation devices, etc. It can provide stable voltage support, improve the operation efficiency and reliability of equipment, reduce the number of power outages, and enhance the user experience.

[0003] When existing backup power supplies such as immersion batteries are started, due to the sudden start of the equipment, a large inrush current will be generated, resulting in a sudden drop in the battery voltage; in some special application scenarios, such as being placed in an outdoor environment with a relatively low ambient temperature, the temperature of the battery itself is relatively low, and its internal resistance will increase accordingly. In this case, the pressure difference during the start of the backup power supply will become larger, and it is very easy to trigger the battery low-voltage protection mechanism. Once the low-voltage protection is triggered, the battery will have a power supply failure, thus affecting the normal operation of the entire backup power supply system, and it cannot play its due backup function at a critical moment, bringing potential risks to the continuous operation of related equipment. Summary of the Invention

[0004] The following is an overview of the subject matter described in detail in this document. This overview is not intended to limit the scope of protection of the claims.

[0005] The main objective of the embodiments of the present invention is to propose a temperature control method, system and storage medium for a backup power supply of a distribution network, which can effectively avoid the low-voltage protection failure during the start of the backup power supply, thereby ensuring the stable operation of related equipment.

[0006] In a first aspect, the embodiments of the present invention provide a temperature control method for a backup power supply of a distribution network, which is applied to a temperature control system for a backup power supply of a distribution network. The temperature control system for a backup power supply of a distribution network includes a backup energy storage device. The backup energy storage device includes a battery housing and multiple groups of lithium battery modules arranged in the battery housing. An immersion refrigerant is filled between the multiple lithium battery modules. A heating module is arranged between the first surface in the battery housing and the lithium battery modules, a first temperature sensing unit is arranged between the second surface in the battery housing and the lithium battery modules, and the first surface and the second surface in the battery housing are opposite to each other. A second temperature sensing unit is arranged along the height direction of the lithium battery modules. The temperature control method for a backup power supply of a distribution network includes: Obtaining a first refrigerant temperature located above the lithium battery modules through the first temperature sensing unit; Determining a first heating power of the heating module according to the first refrigerant temperature and a preset temperature; Obtain the refrigerant temperature difference at various positions in the height direction of the lithium battery module through the second temperature sensing unit; After correcting the first heating power according to the refrigerant temperature difference and the first refrigerant temperature, obtain the second heating power; Control the heating module to heat the refrigerant located below the lithium battery module with the second heating power.

[0007] In some alternative embodiments, at least one magnetic field generator and a deflector plate array are further provided inside the battery housing. The immersion refrigerant includes vegetable oil and magnetic nanoparticles. The deflector plate array is arranged along the arrangement direction of the lithium battery module. When the refrigerant temperature difference is greater than a preset temperature difference value, the method further includes: Obtain the target space area where the refrigerant temperature difference is greater than the preset temperature difference value; Determine a target generator according to the target space area and the arrangement direction of the lithium battery module. The target generator represents the magnetic field generator used to drive the immersion refrigerant in the target space area to move along the arrangement direction of the lithium battery module; Control the magnetic field generator according to the refrigerant temperature difference, so that the magnetic field generator drives the immersion refrigerant to flow along the deflector plate array.

[0008] In some alternative embodiments, the determining the first heating power of the heating module according to the first refrigerant temperature and the preset temperature includes: When the first refrigerant temperature is less than the preset temperature, configure the temperature difference between the first refrigerant temperature and the preset temperature as the temperature difference to be heated; Obtain the first parameters of the immersion refrigerant. The first parameters include refrigerant density, refrigerant specific heat capacity, refrigerant thermal conductivity, and refrigerant volume; Determine the first amount of heat through the temperature difference to be heated and the first parameters. The first amount of heat represents the amount of heat required to heat the immersion refrigerant to the preset temperature; Obtain environmental parameters. The environmental parameters include temperature and humidity, wind speed, and heat conduction medium. The environmental parameters represent the parameters of the environment where the backup energy storage device is located. The heat conduction medium represents the medium for heat exchange with the backup energy storage device; Obtain the heat dissipation coefficient between the immersion refrigerant and the battery housing; Determine the heat loss coefficient according to the heat dissipation coefficient and the environmental parameters; Obtain the preset heating time; Determine the first heating power according to the preset heating time, the first amount of heat, and the heat loss coefficient.

[0009] In some alternative embodiments, correcting the first heating power according to the refrigerant temperature difference and the first refrigerant temperature to obtain a second heating power includes: When the refrigerant temperature difference is greater than a preset temperature difference value, obtaining a temperature difference change curve of the refrigerant temperature difference within a preset time; When the temperature difference change curve indicates that the refrigerant temperature difference increases or remains unchanged over time, configuring the second heating power to zero; When the temperature difference change curve indicates that the refrigerant temperature difference decreases over time, configuring a power curve of the first heating power that changes over time according to the temperature difference change curve and the first refrigerant temperature, and then obtaining the second heating power; When the refrigerant temperature difference is less than or equal to the preset temperature difference value, obtaining a power change value corresponding to a unit of the refrigerant temperature difference; Calculating the second heating power according to the power change value, the refrigerant temperature difference, and the first heating power.

[0010] In some alternative embodiments, when the heating module is heating, the heating module is monitored in real time. The monitoring method of the heating module includes: Obtaining the resistance change rate of the heating module in real time; When the resistance change rate is less than a preset change rate, configuring the heating module as an aging module and generating an aging warning message; Determining a first aging coefficient of the heating module according to the resistance change rate and the preset change rate; Determining the maximum heating power of the heating module according to the first aging coefficient; Determining the standby heating power of the standby heating component according to the maximum heating power and the second heating power; Controlling the heating module to heat at the maximum heating power and the standby heating component to heat at the standby heating power.

[0011] In some alternative embodiments, before obtaining the first refrigerant temperature above the lithium battery module through the first temperature sensing unit, the method further includes: Predicting the off-peak and peak periods of electricity consumption according to the historical electricity consumption data of the distribution network; Configuring the time between the off-peak and peak periods of electricity consumption as the preset heating time.

[0012] In some alternative embodiments, obtaining the first refrigerant temperature above the lithium battery module through the first temperature sensing unit includes: Obtaining a temperature to be corrected above the lithium battery module through the first temperature sensing unit; Obtain the historical working information of the first temperature sensing unit, where the historical working information includes historical working duration information, historical working frequency information, single working state information, and single working environment information; Determine a second aging coefficient of the first temperature sensing unit according to the historical working information and a preset aging model; Obtain the first refrigerant temperature after correcting the temperature to be corrected according to the second aging coefficient and an aging correction curve, where the aging correction curve represents a relationship curve between the second aging coefficient and a temperature correction value.

[0013] In some alternative embodiments, the determining the second aging coefficient of the first temperature sensing unit according to the historical working information and the preset aging model includes: Input the historical working duration information, the historical working frequency information, the single working state information, and the single working environment information through an input layer of the preset aging model; Process the historical working duration information through a first intermediate layer of the preset aging model to obtain a first intermediate aging degree of the first temperature sensing unit; Process the historical working frequency information through a second intermediate layer of the preset aging model, and correct the first intermediate aging degree to obtain a second intermediate aging degree; Process the single working state information through a third intermediate layer of the preset aging model, and correct the second intermediate aging degree to obtain a third intermediate aging degree; Process the single working environment information through a fourth intermediate layer of the preset aging model, and correct the third intermediate aging degree to obtain a fourth intermediate aging degree; Output the fourth intermediate aging degree through an output layer of the preset aging model to obtain the second aging coefficient.

[0014] In a second aspect, an embodiment of the present invention provides a controller, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where when the processor executes the computer program, the temperature control method for the standby power supply of the distribution network described in the first aspect is implemented.

[0015] In a third aspect, an embodiment of the present invention provides a temperature control system for the standby power supply of a distribution network, including the controller described in the second aspect above.

[0016] In a fourth aspect, a computer storage medium stores computer-executable instructions for executing the temperature control method for the standby power supply of the distribution network described in the first aspect.

[0017] The beneficial effects of the present invention include: when the backup battery is started, the first refrigerant temperature above the lithium battery module is obtained by the first temperature sensing unit; the first heating power of the heating module is determined according to the first refrigerant temperature and the preset temperature; the refrigerant temperature difference at each part in the height direction of the lithium battery module is obtained by the second temperature sensing unit; the second heating power is obtained after correcting the first heating power according to the refrigerant temperature difference and the first refrigerant temperature; the heating module is controlled to heat the refrigerant below the lithium battery module with the second heating power. By detecting the refrigerant temperature above the lithium battery module, the heating module is controlled to heat, and when the refrigerant temperature above the lithium battery module reaches the preset temperature, the temperature of other areas also reaches the preset temperature, thus avoiding frequent startup of the heating module or inaccurate heating. At the same time, the heating power of the heating module is corrected by the refrigerant temperature difference to avoid excessive refrigerant temperature difference and local high temperature damage to the lithium battery module. Therefore, the present application can preheat the lithium battery module when the backup power supply is enabled, reduce the internal resistance of the battery, thereby reducing the pressure difference during cold start and avoiding triggering the battery low voltage protection, ensuring the stable operation of related equipment.

[0018] Other features and advantages of the present invention will be described in the following description, and in part, will be obvious from the description, or can be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained by the structures specifically pointed out in the description, claims, and drawings. Brief Description of the Drawings

[0019] Figure 1 is the step flow block diagram of a temperature control method for the backup power supply of a distribution network provided by an embodiment of the present invention; Figure 2 is the structural schematic diagram of a backup energy storage device provided by an embodiment of the present invention; Figure 3 is the valve schematic diagram of a backup energy storage device provided by an embodiment of the present invention; Figure 4 is the schematic diagram of a controller provided by an embodiment of the present invention.

[0020] Reference numerals: controller 1000, processor 1100, memory 1200; Lithium battery module 100, rib groove frame 200, battery housing 300, explosion-proof valve 310, breather valve 320, heating sheet 400. Detailed Description of the Embodiments

[0021] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] It should be noted that although the functional modules are divided in the schematic diagram of the device and the logical sequence is shown in the flowchart, in some cases, the steps shown or described can be executed in a different module division from that in the device or a different sequence from that in the flowchart. Terms such as "first" and "second" in the specification, claims or the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence.

[0023] In the distribution network, immersion batteries are widely used in various grid equipment, such as distribution transformers, reactive power compensation devices, etc. It can provide stable voltage support, improve the operation efficiency and reliability of the equipment, reduce the number of power outages, and enhance the user experience.

[0024] However, when existing backup power supplies such as immersion batteries are started, a large inrush current will be brought about due to the sudden start of the equipment, resulting in a sudden drop in the battery voltage; in some special application scenarios, such as when placed in an outdoor environment with a relatively low ambient temperature, the temperature of the battery itself is relatively low, and its internal resistance will increase accordingly. In this case, the pressure difference during the start-up of the backup power supply will become even larger, and it is very easy to trigger the battery low-voltage protection mechanism. Once the low-voltage protection is triggered, the battery will have a power supply failure, thus affecting the normal operation of the entire backup power supply system, unable to play its due backup function at critical moments, and bringing potential risks to the continuous operation of related equipment.

[0025] To solve the above problems, the present application provides a temperature control method, system and storage medium for the backup power supply of a distribution network.

[0026] In the present application, a temperature control method, system and storage medium for the backup power supply of a distribution network are provided, and will be described in detail one by one in the following embodiments.

[0027] As Figure 1 shown, an embodiment of the present invention provides a temperature control method for the backup power supply of a distribution network, which is applied to a temperature control system for the backup power supply of a distribution network. The temperature control system for the backup power supply of a distribution network includes a backup energy storage device. The backup energy storage device includes a battery housing 300 and multiple groups of lithium battery modules 100 arranged in the battery housing 300. An immersion refrigerant is filled between the multiple lithium battery modules 100. A heating module is arranged between the first surface in the battery housing 300 and the lithium battery modules 100, and a first temperature sensing unit is arranged between the second surface in the battery housing 300 and the lithium battery modules 100. The first surface and the second surface in the battery housing 300 are opposite to each other, and a second temperature sensing unit is arranged along the height direction of the lithium battery modules 100. The temperature control method for the backup power supply of a distribution network includes: S110. Obtain the first refrigerant temperature above the lithium battery module 100 through the first temperature sensing unit; S120. Determine the first heating power of the heating module according to the first refrigerant temperature and a preset temperature; S130. Obtain the refrigerant temperature difference at various positions in the height direction of the lithium battery module 100 through the second temperature sensing unit; S140. Obtain the second heating power after correcting the first heating power according to the refrigerant temperature difference and the first refrigerant temperature; S150. Control the heating module to heat the refrigerant below the lithium battery module 100 with the second heating power.

[0028] Specifically, referring to Figure 2 and Figure 3 , the backup energy storage device of the present application includes a lithium battery module 100, a battery protection board, a heating module, a ribbed groove frame 200, an immersion refrigerant, and a housing. The lithium battery module 100 is composed of multiple lithium iron phosphate battery cells connected in series. The battery cells are closely grouped side by side, and an insulating pad is added in the middle for isolation. The total positive and total negative of the lithium battery module 100 lead out power lines to connect to the battery protection board, and the cell voltage sampling line and temperature sampling line of the lithium battery module 100 are connected to the battery protection board.

[0029] The power line input of the battery protection board is the total positive and total negative of the battery pack, and the power line output is connected to the positive and negative poles of the housing. The sampling line input is the cell voltage sampling line and temperature sampling line. On the battery protection board, the total positive of the lithium battery module 100 is connected to the positive pole of the housing, and the total negative of the lithium battery module 100 is connected to the negative pole of the housing through two groups of series-connected N-MOS transistors. The battery protection board controls the on and off of the N-MOS transistors according to the cell voltage and temperature to avoid problems such as overcharging, over-discharging, over-current, or over-temperature of the battery, and realizes battery protection.

[0030] The heating module is composed of a heating sheet 400. The heating sheet 400 is placed outside the lower part of the lithium battery module 100 and can heat the refrigerant medium. The first temperature sensing unit obtains the first refrigerant temperature above the lithium battery module 100. When the first refrigerant temperature is lower than the preset temperature (such as 15°C, the specific temperature value is determined according to the actual scenario and is not limited here), the heating sheet 400 is started for heating. When the temperature is higher than the set threshold (such as 25°C), the heating is stopped.

[0031] The rib groove frame 200 is placed between the outer shell and the lithium battery module 100, which is used to fix the lithium battery module 100 and accelerate heat conduction. The refrigerant medium is a low-viscosity liquid with good insulation performance, heat conduction performance and flame retardant performance, which fills the inside of the outer shell and is used for uniform heat control of the battery pack and preventing fires caused by battery thermal runaway. The refrigerant medium is preferably an environmentally friendly vegetable oil. The outer shell is made of high-strength insulating material and has good airtightness. The positive electrode and the negative electrode are arranged on the outer shell, the battery protection board is connected inside, and the charger and the load are connected outside. A breather valve 320 and an explosion-proof valve 310 are arranged on the outer shell. When the air pressure in the battery box changes slowly, the battery box inhales or exhales through the breather valve to keep the internal and external pressures consistent; when the air pressure in the battery box rises rapidly and exceeds the set value (0.3 - 0.5 MPa), the explosion-proof valve 310 bursts outwards.

[0032] By setting the first temperature sensing unit above the lithium battery module 100 and setting the heating module below the lithium battery module 100, the immersion refrigerant is heated from bottom to top. When the first refrigerant temperature reaches the preset temperature, other parts also reach the preset temperature. However, if the first temperature sensing unit is set in other areas, it may occur that the temperatures of other parts do not reach the standard. After heat exchange in other parts, the first refrigerant temperature drops, resulting in repeated start and stop of the heating module. The first heating power of the heating module is determined according to the first refrigerant temperature and the preset temperature. That is, if the first refrigerant temperature is low and the preset temperature is high, the corresponding first heating power is large; otherwise, it is small, which will not be elaborated here. The second temperature sensing unit is set in the height direction of the lithium battery module 100, that is, in the straight line area between the heating module and the first temperature sensing unit, and is used to detect the temperature difference between the preset height differences to obtain the corresponding refrigerant temperature differences at each place. If the refrigerant temperature difference is too large, it indicates that there is a problem with surface heat transfer, and continuous heating will cause local high temperature to damage the battery; while if the temperature difference is small, the temperatures of all parts on the surface are balanced, and the heating power can be appropriately increased. That is, the corresponding second heating power is obtained after correction, and the refrigerant is heated through the second heating power until the first refrigerant temperature is equal to the preset temperature. Thus, it is ensured that the standby power supply has a suitable temperature when starting, avoiding the low-voltage protection failure caused by low battery temperature.

[0033] In some alternative embodiments, at least one magnetic field generator and a deflector plate array are further provided inside the battery housing 300. The immersion refrigerant includes vegetable oil and magnetic nanoparticles. The deflector plate array is arranged along the arrangement direction of the lithium battery module 100. When the temperature difference of the refrigerant is greater than a preset temperature difference value, the method further includes: obtaining a target spatial region where the temperature difference of the refrigerant is greater than the preset temperature difference value; determining a target generator according to the target spatial region and the arrangement direction of the lithium battery module 100, where the target generator represents the magnetic field generator for driving the immersion refrigerant in the target spatial region to move along the arrangement direction of the lithium battery module 100; controlling the magnetic field generator according to the temperature difference of the refrigerant so that the magnetic field generator drives the immersion refrigerant to flow along the deflector plate array.

[0034] It should be noted that the magnetic field generator in the embodiment of the present invention can be arranged outside the battery housing 300 or inside the battery housing 300 according to requirements, and the specific installation position is not limited; multiple magnetic field generators can be specifically arranged to control the magnetic field strength and direction in different regions of the lithium battery. For example: the magnetic field generator adopts a Helmholtz coil array, with a maximum power of 50W for each generator and an adjustable magnetic field strength range of 0 - 500mT. It is distributed at the bottom and side of the battery housing 300. A corresponding concentration of magnetic nanoparticles (such as iron oxide magnetic nanoparticles) is added to the vegetable oil, so that the obtained immersion refrigerant has magnetism and can be driven by the magnetic field. The magnetic field generator generates an alternating magnetic field to drive the directional movement of the magnetic nanoparticles, driving the immersion refrigerant to form a controllable convection. The deflector plate guides the fluid to form a serpentine flow path along the module gap, enhancing the heat transfer efficiency, thereby balancing the temperature difference and preventing heat from accumulating in a local area and damaging the lithium battery module 100. The deflector plate array is arranged along the arrangement direction of the lithium battery module 100; the shape, size and spacing of the deflector plate are designed according to requirements to guide the immersion refrigerant to flow along a specific path and enhance the heat exchange efficiency between the refrigerant in the battery modules.

[0035] Specifically, the immersion refrigerant is composed of vegetable oil and magnetic nanoparticles. The vegetable oil serves as the basic carrier and has good insulation properties and certain heat conduction performance. The magnetic nanoparticles are evenly dispersed in the vegetable oil, enabling the refrigerant to have a directional flow under the action of a magnetic field. When the refrigerant temperature difference monitored by the second temperature sensing unit is greater than the preset temperature difference value, the system first determines the specific area with excessive temperature difference, that is, the target space area. This process can perform spatial mapping and analysis based on the distribution positions of the temperature sensing units and the collected temperature data to accurately locate the temperature anomaly area. According to the position of the target space area and the arrangement direction of the lithium battery module 100, the system determines the magnetic field generator most suitable for driving the flow of the immersion refrigerant in this area, that is, the target generator; it is necessary to consider the position of the magnetic field generator, the magnetic field coverage range, and the relative relationship with the target space area to ensure that the magnetic field can effectively act on the refrigerant in the target area. The control system precisely controls the magnetic field strength and direction of the target generator according to the magnitude of the refrigerant temperature difference. Under the action of the magnetic field, the immersion refrigerant containing magnetic nanoparticles will flow along the deflector array to form a regular convection. The directional flow can accelerate the heat transfer from the high-temperature area to the low-temperature area, effectively reducing the refrigerant temperature difference and making the temperature distribution in the entire battery housing 300 more uniform. Thus, the refrigerant can continue to be heated, which not only improves the working efficiency and safety of the lithium battery module 100 but also enhances the heating efficiency of the lithium battery.

[0036] In some embodiments, determining the first heating power of the heating module according to the first refrigerant temperature and the preset temperature includes: when the first refrigerant temperature is less than the preset temperature, configuring the temperature difference between the first refrigerant temperature and the preset temperature as the temperature difference to be heated; obtaining the first parameters of the immersion refrigerant, where the first parameters include refrigerant density, refrigerant specific heat capacity, refrigerant thermal conductivity, and refrigerant volume; determining the first amount of heat through the temperature difference to be heated and the first parameters, where the first amount of heat represents the amount of heat required to heat the immersion refrigerant to the preset temperature; obtaining environmental parameters, where the environmental parameters include temperature and humidity, wind speed, and heat conduction medium, and the environmental parameters represent the parameters of the environment where the backup energy storage device is located, and the heat conduction medium represents the medium for heat exchange with the backup energy storage device; obtaining the heat dissipation coefficient between the immersion refrigerant and the battery housing 300; determining the heat loss coefficient according to the heat dissipation coefficient and the environmental parameters; obtaining the preset heating time; and determining the first heating power according to the preset heating time, the first amount of heat, and the heat loss coefficient.

[0037] Specifically, when the first refrigerant temperature detected by the first temperature sensing unit is less than the preset temperature, the control system of the present application calculates the difference between the two and defines the difference as the temperature difference to be heated. For example, if the preset temperature is 25°C and the current first refrigerant temperature is 15°C, then the temperature difference to be heated is 10°C. Obtain the specific parameters of the immersion refrigerant. Among them, the refrigerant density reflects the mass of the refrigerant per unit volume; the specific heat capacity of the refrigerant refers to the heat required for a unit mass of the refrigerant to increase by a unit temperature. The larger the specific heat capacity, the more heat is required to heat the same mass of the refrigerant to the target temperature; the thermal conductivity of the refrigerant measures the ability of the refrigerant to conduct heat. A refrigerant with a high thermal conductivity can transfer heat to the lithium battery module 100 faster and improve the heat exchange efficiency; the volume of the refrigerant is the total volume of the refrigerant filled in the battery housing 300, and the volume of the refrigerant determines the total amount of refrigerant to be heated. Based on the temperature difference to be heated and the first parameters obtained, the system uses the thermodynamic formula to calculate the heat required to heat the immersion refrigerant from the current temperature to the preset temperature, that is, the first heat.

[0038] The control system collects the relevant parameters of the environment where the standby energy storage device is located through the peripheral temperature and humidity sensors, wind speed sensors and the pre-stored medium parameters, and determines the loss of heat during the transfer process through the environmental parameters.

[0039] Among them, the environmental temperature and humidity will affect the heat exchange rate between the battery housing 300 and the surrounding environment. For example, in a high-temperature environment, heat dissipation will become more difficult; while a high-humidity environment may affect the thermal conductivity of some materials. The environmental wind speed will affect the convective heat dissipation on the surface of the battery housing 300. The greater the wind speed, the higher the heat dissipation rate usually is. The heat conduction medium refers to the surrounding medium that exchanges heat with the standby energy storage device, such as air, soil, etc. Different heat conduction media have different thermal conductivities, which will have a significant impact on heat transfer. The system analyzes the heat transfer characteristics between the immersion refrigerant and the battery housing 300 to determine the heat dissipation coefficient. The heat dissipation coefficient reflects the ability of the refrigerant to dissipate heat to the surrounding environment through the battery housing 300, and its magnitude is related to factors such as the material characteristics, contact area and interface state of the refrigerant and the battery housing 300.

[0040] According to the heat dissipation coefficient and the obtained environmental parameters, the system calculates the heat loss coefficient. The heat loss coefficient represents the proportion of heat loss caused by heat dissipation to the surrounding environment during the heating process. For example, if the heat loss coefficient is 0.2, it means that 20% of the heat will be dissipated into the environment during the heating process. The calculation of this coefficient is usually based on empirical formulas or experimental data and will be dynamically adjusted according to real-time environmental parameters.

[0041] According to the working requirements of the lithium battery module 100 and the response characteristics of the temperature control system, a reasonable preset heating time is set. The preset heating time determines how long it takes to heat the refrigerant to the preset temperature, and it is inversely proportional to the heating power. Finally, combining the preset heating time, the first heat quantity, and the heat loss coefficient, the first heating power required by the heating module is calculated. Through an accurate calculation method, the temperature control system can dynamically adjust the heating power according to the actual working conditions and environmental conditions, ensuring that the lithium battery module 100 can be maintained within a suitable working temperature range in various situations while avoiding waste of energy.

[0042] In some embodiments, the obtaining the second heating power after correcting the first heating power according to the refrigerant temperature difference and the first refrigerant temperature includes: when the refrigerant temperature difference is greater than a preset temperature difference value, obtaining a temperature difference change curve of the refrigerant temperature difference within a preset time; when the temperature difference change curve indicates that the refrigerant temperature difference increases or remains unchanged with time, configuring the second heating power to zero; when the temperature difference change curve indicates that the refrigerant temperature difference decreases with time, configuring a power curve of the first heating power changing with time according to the temperature difference change curve and the first refrigerant temperature to obtain the second heating power; when the refrigerant temperature difference is less than or equal to the preset temperature difference value, obtaining a power change value corresponding to a unit of the refrigerant temperature difference; calculating the second heating power according to the power change value, the refrigerant temperature difference, and the first heating power.

[0043] Specifically, when the refrigerant temperature difference detected by the second temperature sensing unit is greater than the preset temperature difference value, it indicates that there is a situation of local overheating inside the battery. By recording the change of the refrigerant temperature difference within a preset time, a temperature difference change curve is formed, and this curve reflects the evolution trend of the temperature distribution non-uniformity over time.

[0044] If the temperature difference change curve shows that the refrigerant temperature difference increases or remains unchanged with time, it means that the current heating strategy exacerbates the uneven temperature distribution. At this time, the second heating power is configured to zero, and the heating is paused to avoid the problem from deteriorating. At the same time, other heat dissipation mechanisms can be triggered to balance the temperature.

[0045] If the temperature difference change curve indicates that the refrigerant temperature difference decreases with time, it means that the current heating strategy is improving the temperature distribution. Then, according to the temperature difference change curve and the first refrigerant temperature, a power curve of the first heating power changing with time is configured to obtain the second heating power. The dynamic adjustment makes the heating power match the temperature change trend, achieving more precise temperature control.

[0046] When the refrigerant temperature difference is less than or equal to the preset temperature difference value, a linear correction method is adopted: preset or obtain through a learning algorithm the power change value corresponding to the unit refrigerant temperature difference. This value represents the amplitude by which the heating power needs to be adjusted when the refrigerant temperature difference changes by 1°C. The linear correction method is simple and efficient, and can quickly adjust the heating power to adapt to small temperature changes and maintain the stability inside the lithium battery when the temperature distribution is basically uniform.

[0047] In some alternative embodiments, obtaining the second heating power after configuring the power curve of the first heating power varying with time according to the temperature difference change curve and the first refrigerant temperature includes: By taking the derivative of the temperature difference change curve, calculate the change rate of the refrigerant temperature difference at different time points. The change rate reflects the speed of improvement of the temperature distribution non-uniformity. For example, a large negative change rate indicates that the temperature distribution is rapidly tending to be uniform.

[0048] Detect the inflection point in the temperature difference change curve, that is, the point where the change rate changes significantly. The inflection point marks the transition of the temperature distribution state, such as the transition point from rapid improvement to slow improvement.

[0049] Based on the historical data and the characteristics of the temperature difference change curve, use the time series analysis method to predict the temperature difference change trend in the next preset time period.

[0050] Calculate the difference between the first refrigerant temperature and the preset temperature, and this difference determines the basic heating requirement.

[0051] Evaluate the degree of influence of the heating power change on the temperature distribution at the current first refrigerant temperature. For example, in a low-temperature environment, the same power change may have a greater impact on the temperature distribution.

[0052] Based on the characteristics of the temperature difference change curve and the evaluation result of the first refrigerant temperature, adopt the following strategy to configure the power curve: when the temperature difference change curve shows that the refrigerant temperature difference is decreasing, but the change rate is small, and the first refrigerant temperature is much lower than the preset temperature, appropriately increase the heating power in the initial stage to accelerate the uniformization of the temperature distribution; near the inflection point of the temperature difference change curve, smoothly adjust the slope of the power curve to avoid temperature fluctuations caused by sudden changes in the heating power; when the temperature difference change curve shows that the refrigerant temperature difference is close to the preset temperature difference value and the first refrigerant temperature is close to the preset temperature, reduce the amplitude of the power adjustment for fine control.

[0053] Dynamically generate the second heating power according to the configured power curve: Divide the entire heating process into multiple time slices, for example, one slice per minute or every 30 seconds. For each time slice, determine the corresponding heating power value according to the power curve. These power values form a sequence of the second heating power varying with time. Fine-tune the power curve according to the real-time monitored refrigerant temperature difference and the first refrigerant temperature to ensure that the second heating power always matches the actual working conditions.

[0054] In some embodiments, during the heating of the heating module, the heating module is monitored in real time. The monitoring method of the heating module includes: obtaining the resistance change rate of the heating module in real time; in the case where the resistance change rate is less than the preset change rate, configuring the heating module as an aging module and generating an aging warning message; determining the first aging coefficient of the heating module according to the resistance change rate and the preset change rate; determining the maximum heating power of the heating module according to the first aging coefficient; determining the standby heating power of the standby heating component according to the maximum heating power and the second heating power; controlling the heating module to heat at the maximum heating power and the standby heating component to heat at the standby heating power.

[0055] Specifically, the aging state of the heating module is evaluated by monitoring the resistance change rate of the heating module in real time. The resistance change rate refers to the percentage change in the resistance value per unit time. When the monitored resistance change rate is less than the preset change rate, it indicates that the resistance change of the heating module is extremely slow, and there may be an aging phenomenon. At this time, mark the aging module for special management; at the same time, send an aging warning message to the system administrator to remind to check or replace the heating module in time.

[0056] Determine the first aging coefficient according to the ratio of the resistance change rate to the preset change rate. The first aging coefficient reflects the aging degree of the heating module. The smaller the coefficient, the more serious the aging. Based on the first aging coefficient, dynamically adjust the maximum heating power of the heating module. That is, by reducing the maximum heating power of the aging heating module, the overheating risk caused by aging can be avoided, the service life of the heating module can be extended, and the safety of the lithium battery can be guaranteed.

[0057] When the heating module ages, enabling a standby heating component to supplement the heating capacity can ensure that the total heating power of the system meets the temperature control requirements, while avoiding overloading the aging heating module. At the same time, control the aging heating module and the standby heating component to carry out collaborative heating: limit the power of the aging heating module not to exceed its maximum heating power to ensure safe operation; according to the calculated standby heating power, control the standby heating component to provide additional heating capacity. During the heating process, monitor the temperature change in real time and dynamically adjust the heating power of the two modules to maintain a stable heating effect. By giving early warnings about aging problems, preventive maintenance can be achieved, reducing the risk of system failures. Limit the power of the aging heating module to avoid safety hazards caused by overheating. Through the supplement of the standby heating component, ensure that the system can still work properly when the heating module ages.

[0058] In some embodiments, before obtaining the first refrigerant temperature above the lithium battery module 100 through the first temperature sensing unit, the method further includes: predicting the low electricity consumption period and the high electricity consumption period based on the historical electricity consumption data of the power distribution network; configuring the time between the low electricity consumption period and the high electricity consumption period as the preset heating time.

[0059] Specifically, use the historical electricity consumption data of the power distribution network for time series analysis to predict the future low and high electricity consumption periods. By collecting the electricity load data of the power distribution network in the past few weeks or months, and performing cleaning and standardization processing. Identify the periodic patterns of the electricity load through methods such as Fourier transform and wavelet analysis, such as daily cycle, weekly cycle, etc. Combine corresponding machine learning algorithms to predict the future electricity load trend and determine the possible low and high periods. Based on the predicted peak and valley periods of electricity consumption, configure the time period between the low and high periods as the preset heating time: the low electricity consumption period usually corresponds to the period with lower electricity prices, and heating at this time can reduce the operating cost. Complete the heating before the high electricity consumption period arrives to ensure that the lithium battery module 100 is at the optimal working temperature under high load requirements. Dynamically adjust the length of the preset heating time according to the predicted time difference between the peak and valley periods to ensure maximum cost - effectiveness without affecting the system response. Use the electric energy during the low period for heating, reduce the power demand during the high period, and relieve the power grid pressure. By heating during the low - electricity - price period, significantly reduce the operating cost of the system. Optimize the charge - discharge cycle of the energy storage device to improve the battery service life and the overall system efficiency.

[0060] In some embodiments, obtaining the first refrigerant temperature above the lithium battery module 100 by the first temperature sensing unit includes: obtaining the temperature to be corrected above the lithium battery module 100 by the first temperature sensing unit; obtaining the historical working information of the first temperature sensing unit, where the historical working information includes historical working duration information, historical working times information, single working state information, and single working environment information; determining the second aging coefficient of the first temperature sensing unit according to the historical working information and a preset aging model; and obtaining the first refrigerant temperature after correcting the temperature to be corrected according to the second aging coefficient and an aging correction curve, where the aging correction curve represents the relationship curve between the second aging coefficient and the temperature correction value.

[0061] Specifically, the first temperature sensing unit directly collects the refrigerant temperature above the lithium battery module 100 to obtain the temperature to be corrected. This original measurement value may be deviated due to the influence of the aging of the sensing unit itself. Therefore, by calculating the aging coefficient of the first temperature sensing unit, the required first refrigerant temperature can be obtained after correcting the temperature to be corrected. By continuously recording the historical working information of the first temperature sensing unit: Historical working duration: cumulative working time, reflecting the long-term aging effect. Historical working times: start / stop cycle times, affecting the stability of the sensor. Single working state: parameters such as the temperature range and working duration of each work. Single working environment: external conditions such as ambient temperature, humidity, and vibration during each work.

[0062] Based on the historical working information and a preset aging model, the system calculates the aging degree of the sensing unit to obtain the second aging coefficient. The relationship between the second aging coefficient and the temperature correction value is reflected by the aging correction curve, and the first refrigerant temperature is obtained after correcting the temperature to be corrected according to the second aging coefficient and the aging correction curve.

[0063] In some alternative embodiments, determining the second aging coefficient of the first temperature sensing unit according to the historical working information and the preset aging model includes: inputting the historical working duration information, the historical working frequency information, the single working state information, and the single working environment information through the input layer of the preset aging model; processing the historical working duration information through the first intermediate layer of the preset aging model to obtain the first intermediate aging degree of the first temperature sensing unit; processing the historical working frequency information through the second intermediate layer of the preset aging model, and correcting the first intermediate aging degree to obtain the second intermediate aging degree; processing the single working state information through the third intermediate layer of the preset aging model, and correcting the second intermediate aging degree to obtain the third intermediate aging degree; processing the single working environment information through the fourth intermediate layer of the preset aging model, and correcting the third intermediate aging degree to obtain the fourth intermediate aging degree; and outputting the fourth intermediate aging degree through the output layer of the preset aging model to obtain the second aging coefficient.

[0064] Specifically, the input layer of the preset aging model receives historical working information, including historical working duration information, historical working frequency information, single working state information, and single working environment information. The historical working information is input into the model in a corresponding data format (such as numbers, vectors, etc.). For example, the historical working duration can be represented by a numerical value in hours; the historical working frequency is a specific numerical value; the single working state information covers multiple parameters such as rotational speed and current, which are organized into a vector; the single working environment information includes temperature, humidity, etc., and can also be represented in vector form.

[0065] The first intermediate layer processes the input historical working duration information. The first intermediate layer incorporates corresponding functions or algorithms to describe the relationship between the working duration and the first intermediate aging degree.

[0066] The second intermediate layer analyzes and processes the historical working frequency information, and then uses the processing result to correct the first intermediate aging degree; each start and stop of the first temperature sensing unit will cause certain impacts and wear on its internal mechanical and electrical components, so the working frequency is also an important factor affecting aging; the second intermediate layer uses a corresponding function to describe the impact of the working frequency on aging, and then corrects the first aging degree through a correction formula to obtain the second intermediate aging degree.

[0067] The single - working - state information includes parameters such as temperature range, working duration, current, voltage, etc. These parameters reflect the actual operating conditions of the first temperature - sensing unit during the working process. Different working states have different effects on the aging of the first temperature - sensing unit. For example, working states with high temperature and large current will accelerate the aging of the first temperature - sensing unit. The third intermediate layer will comprehensively process the single - working - state information, calculate statistics such as the average value and maximum value of these parameters, and then correct the second - intermediate aging degree according to these statistics.

[0068] The single - working - environment information includes factors such as temperature - humidity and vibration. These environmental conditions will have a significant impact on the aging of the first temperature - sensing unit. For example, a high - temperature environment will accelerate the aging of the insulating material of the first temperature - sensing unit, and a humid environment may cause parts to rust. The fourth intermediate layer will process the single - working - environment information to obtain a correction factor related to the environment. Then, through the corresponding correction formula, the third - intermediate aging degree is corrected to obtain the fourth - intermediate aging degree.

[0069] The output layer of the preset aging model will output the fourth - intermediate aging degree as the final result, that is, obtain the second aging coefficient of the first temperature - sensing unit. The second aging coefficient intuitively reflects the aging degree of the first temperature - sensing unit during the historical working process, so as to facilitate determining the temperature correction value of the first temperature - sensing unit according to the aging degree.

[0070] The beneficial effects of the present invention include: When the backup battery is started, the first refrigerant temperature above the lithium - battery module 100 is obtained through the first temperature - sensing unit; the first heating power of the heating module is determined according to the first refrigerant temperature and the preset temperature; the refrigerant temperature difference at each location in the height direction of the lithium - battery module 100 is obtained through the second temperature - sensing unit; the first heating power is corrected according to the refrigerant temperature difference and the first refrigerant temperature to obtain the second heating power; the heating module is controlled to heat the refrigerant below the lithium - battery module 100 with the second heating power. By detecting the refrigerant temperature above the lithium - battery module 100, the heating module is controlled to heat, and when the refrigerant temperature above the lithium - battery module 100 reaches the preset temperature, the temperatures in other areas also reach the preset temperature, thus avoiding frequent start - up of the heating module or inaccurate heating. At the same time, the heating power of the heating module is corrected by the refrigerant temperature difference to avoid too large a refrigerant temperature difference and local high temperature damage to the lithium - battery module 100. Therefore, this application can pre - heat the lithium - battery module 100 when the backup power supply is enabled, reduce the internal resistance of the battery, thereby reducing the pressure difference during cold start and avoiding triggering the battery low - voltage protection, ensuring the stable operation of related equipment.

[0071] As Figure 4 shown, Figure 4The block diagram of a controller 1000 provided according to an embodiment of the present application is shown. The components of the controller 1000 include but are not limited to a memory 1200 and a processor 1100. The processor 1100 is connected to the memory 1200 via a bus, and the memory 1200 is used to store data.

[0072] The controller 1000 further includes an access device, which enables the controller 1000 to communicate via one or more networks. Examples of these networks include the Public Switched Telephone Network (PSTN), Local Area Network (LAN), Wide Area Network (WAN), Personal Area Network (PAN), or a combination of communication networks such as the Internet. The access device may include one or more of any type of wired or wireless network interface (e.g., Network Interface Card (NIC)), such as IEEE802.11 Wireless Local Area Network (WLAN) wireless interface, Worldwide Interoperability for Microwave Access (Wi-MAX) interface, Ethernet interface, Universal Serial Bus (USB) interface, cellular network interface, Bluetooth interface, Near Field Communication (NFC) interface, and so on.

[0073] The controller 1000 can be any type of stationary or mobile electronic device, including mobile computers or mobile electronic devices (e.g., tablet computers, personal digital assistants, laptop computers, notebook computers, netbooks, etc.), mobile phones (e.g., smartphones), wearable electronic devices (e.g., smartwatches, smart glasses, etc.) or other types of mobile devices, or stationary electronic devices such as desktop computers or PCs. The controller 1000 can also be a mobile or stationary server.

[0074] Among them, the processor 1100 is used to execute computer-executable instructions for the temperature control method of the backup power supply of the distribution network.

[0075] The above is a schematic solution of a controller in this embodiment. It should be noted that the technical solution of this controller and the technical solution of the above temperature control method of the backup power supply of the distribution network belong to the same concept. For the details not described in the technical solution of the controller, reference can be made to the description of the technical solution of the above temperature control method of the backup power supply of the distribution network.

[0076] According to an embodiment of the present application, there is also provided a temperature control system for the backup power supply of a distribution network. The temperature control system for the backup power supply of the distribution network includes a backup energy storage device, in which a controller 1000 is installed, or the backup energy storage device is communicatively connected to the controller 1000, so that the backup energy storage device realizes the temperature regulation of the backup energy storage device through the controller 1000. It should be noted that the technical solution of the temperature control system for the backup power supply of the distribution network belongs to the same concept as the technical solution of the above-mentioned temperature control method for the backup power supply of the distribution network. For the details not described in the technical solution of the computing device, reference can be made to the description of the technical solution of the above-mentioned temperature control method for the backup power supply of the distribution network.

[0077] An embodiment of the present application also provides a storage medium, which is a computer-readable storage medium. The storage medium stores a computer program, and when the computer program is executed by a processor, it realizes the above-mentioned temperature control method for the backup power supply of the distribution network.

[0078] As a non-transitory computer-readable storage medium, the memory can be used to store non-transitory software programs and non-transitory computer-executable programs. In addition, the memory can include high-speed random access memory, and can also include non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory can include a memory remotely disposed relative to the processor, and these remote memories can be connected to the processor through a network. Examples of the above networks include, but are not limited to, the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof. The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0079] Those of ordinary skill in the art will understand that all or some of the steps and systems disclosed above can be implemented as software, firmware, hardware, and their appropriate combinations. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or can be implemented as hardware, or can be implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cartridges, tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0080] The above is a specific description of the preferred embodiment of the present application, but the present application is not limited to the above embodiments. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present application, and these equivalent deformations or substitutions are all included within the scope defined by the claims of the present application.

Claims

1. A temperature control method for the backup power supply of a distribution network, characterized in that, Standby power temperature control system applied to a distribution network. The standby power temperature control system of the distribution network includes a standby energy storage device. The standby energy storage device includes a battery housing and multiple lithium battery modules arranged in the battery housing. Immersion refrigerant is filled between the multiple lithium battery modules. A heating module is arranged between the first surface in the battery housing and the lithium battery modules, and a first temperature sensing unit is arranged between the second surface in the battery housing and the lithium battery modules. The first surface and the second surface in the battery housing are opposite to each other, and a second temperature sensing unit is arranged along the height direction of the lithium battery modules. The standby power temperature control method for the distribution network includes: Obtaining the first refrigerant temperature above the lithium battery modules through the first temperature sensing unit; Determining the first heating power of the heating module according to the first refrigerant temperature and a preset temperature; Obtaining the refrigerant temperature difference at various positions in the height direction of the lithium battery modules through the second temperature sensing unit; Correcting the first heating power according to the refrigerant temperature difference and the first refrigerant temperature to obtain a second heating power; Controlling the heating module to heat the refrigerant below the lithium battery modules with the second heating power.

2. The temperature control method for the backup power supply of the distribution network according to claim 1, wherein, At least one magnetic field generator and a deflector array are further arranged in the battery housing. The immersion refrigerant includes vegetable oil and magnetic nanoparticles. The deflector array is arranged along the arrangement direction of the lithium battery modules. When the refrigerant temperature difference is greater than a preset temperature difference value, the method further includes: Obtaining a target space area where the refrigerant temperature difference is greater than the preset temperature difference value; Determining a target generator according to the target space area and the arrangement direction of the lithium battery modules. The target generator represents the magnetic field generator used to drive the immersion refrigerant in the target space area to move along the arrangement direction of the lithium battery modules; Controlling the magnetic field generator according to the refrigerant temperature difference so that the magnetic field generator drives the immersion refrigerant to flow along the deflector array.

3. The temperature control method for the backup power supply of the distribution network according to claim 1, wherein The determining the first heating power of the heating module according to the first refrigerant temperature and the preset temperature includes: When the first refrigerant temperature is less than the preset temperature, configuring the temperature difference between the first refrigerant temperature and the preset temperature as the temperature difference to be heated; Obtaining a first parameter of the immersion refrigerant. The first parameter includes refrigerant density, refrigerant specific heat capacity, refrigerant thermal conductivity, and refrigerant volume; Determining a first amount of heat through the temperature difference to be heated and the first parameter. The first amount of heat represents the amount of heat required to heat the immersion refrigerant to the preset temperature; Obtaining environmental parameters. The environmental parameters include temperature and humidity, wind speed, and heat conduction medium. The environmental parameters represent the parameters of the environment where the standby energy storage device is located, and the heat conduction medium represents the medium for heat exchange with the standby energy storage device; Obtaining the heat dissipation coefficient between the immersion refrigerant and the battery housing; Determining a heat loss coefficient according to the heat dissipation coefficient and the environmental parameters; Obtaining a preset heating time; Determining the first heating power according to the preset heating time, the first amount of heat, and the heat loss coefficient.

4. The temperature control method for the standby power supply of the distribution network according to claim 1, wherein The modification of the first heating power according to the refrigerant temperature difference and the first refrigerant temperature to obtain a second heating power includes: When the refrigerant temperature difference is greater than a preset temperature difference value, obtain the temperature difference change curve of the refrigerant temperature difference within a preset time; When the temperature difference change curve indicates that the refrigerant temperature difference increases or remains unchanged over time, configure the second heating power to zero; When the temperature difference change curve indicates that the refrigerant temperature difference decreases over time, configure the power curve of the first heating power changing with time according to the temperature difference change curve and the first refrigerant temperature, and then obtain the second heating power; When the refrigerant temperature difference is less than or equal to the preset temperature difference value, obtain the power change value corresponding to a unit of the refrigerant temperature difference; Calculate the second heating power according to the power change value, the refrigerant temperature difference and the first heating power.

5. The temperature control method for the backup power supply of the distribution network according to claim 1, wherein When the heating module is heating, perform real-time monitoring on the heating module. The monitoring method of the heating module includes: Obtain the resistance change rate of the heating module in real time; When the resistance change rate is less than the preset change rate, configure the heating module as an aging module and generate an aging warning message; Determine the first aging coefficient of the heating module according to the resistance change rate and the preset change rate; Determine the maximum heating power of the heating module according to the first aging coefficient; Determine the standby heating power of the standby heating component according to the maximum heating power and the second heating power; Control the heating module to heat at the maximum heating power and the standby heating component to heat at the standby heating power.

6. The temperature control method for the backup power supply of the distribution network according to claim 3, wherein Before obtaining the first refrigerant temperature above the lithium battery module through the first temperature sensing unit, the method further includes: Predict the low electricity consumption period and the high electricity consumption period according to the historical power consumption data of the distribution network; Configure the time between the low electricity consumption period and the high electricity consumption period as the preset heating time.

7. The temperature control method for the backup power supply of the distribution network according to claim 1, characterized in that, The obtaining of the first refrigerant temperature above the lithium battery module through the first temperature sensing unit includes: Obtain the temperature to be corrected above the lithium battery module through the first temperature sensing unit; Obtain the historical working information of the first temperature sensing unit, where the historical working information includes historical working duration information, historical working times information, single working state information and single working environment information; Determine the second aging coefficient of the first temperature sensing unit according to the historical working information and a preset aging model; Correct the temperature to be corrected according to the second aging coefficient and an aging correction curve to obtain the first refrigerant temperature, where the aging correction curve represents the relationship curve between the second aging coefficient and the temperature correction value.

8. The temperature control method for the standby power supply of the distribution network according to claim 7, wherein The determination of the second aging coefficient of the first temperature sensing unit according to the historical working information and a preset aging model includes: Input the historical working duration information, the historical working times information, the single working state information and the single working environment information into the input layer of the preset aging model; The first intermediate aging degree of the first temperature sensing unit is obtained after processing the historical working duration information through the first intermediate layer of the preset aging model; After processing the historical working times information through the second intermediate layer of the preset aging model, the first intermediate aging degree is corrected to obtain the second intermediate aging degree; After processing the single working state information through the third intermediate layer of the preset aging model, the second intermediate aging degree is corrected to obtain the third intermediate aging degree; After processing the single working environment information through the fourth intermediate layer of the preset aging model, the third intermediate aging degree is corrected to obtain the fourth intermediate aging degree; The second aging coefficient is obtained after outputting the fourth intermediate aging degree through the output layer of the preset aging model.

9. A temperature control system for the backup power supply of a distribution network, characterized in that, It includes a controller, and the controller includes: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it implements the temperature control method for the backup power supply of the distribution network according to any one of claims 1-8.

10. A computer storage medium, characterized in that, The computer storage medium stores computer-executable instructions for executing the temperature control method for the backup power supply of the distribution network according to any one of claims 1-8.

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