Temperature control method and device for string type integrated cabin

Abstract

The invention provides a temperature control method and device for a string type integrated cabin, and relates to the technical field of energy storage. The temperature control method of the string type integrated cabin comprises the following steps: acquiring a temperature value of each battery pack string; performing cooling resource allocation according to the temperature value and the temperature set value of each battery pack string in the plurality of battery pack strings, and determining a cooling resource allocation value corresponding to the battery pack string; for each battery pack string in the plurality of battery pack strings, determining an output power adjustment value corresponding to the battery pack string according to the temperature value of the battery pack string and the average temperature value of the string type integrated cabin; according to the cooling resource allocation value and the output power adjustment value, whole cabin temperature equalization control is conducted on the string type integrated cabin, and the whole cabin temperature equalization control comprises the steps that cooling devices corresponding to the battery pack strings are controlled to output cooling resources according to the cooling resource allocation value, and the output power of the battery pack strings is adjusted according to the output power adjustment value. The heat dissipation effect of the string type integrated cabin can be improved.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a temperature control method and device for a string-type integrated compartment. Background Technology

[0002] Electrochemical energy storage systems, as a key technology for realizing electrical energy storage and conversion, play a vital role in the generation, transmission, distribution, and consumption processes of modern power systems, including smoothing transitions, peak shaving and valley filling, and frequency and voltage regulation. Among them, string-type integrated storage systems, as an important form of electrochemical energy storage system, have been widely used due to their modular design, ease of expansion, and maintenance. However, the energy storage batteries in string-type integrated storage systems generate a large amount of heat during operation. If not cooled effectively and promptly, the internal temperature can become excessively high, not only reducing the lifespan of the energy storage batteries but also potentially triggering thermal runaway, leading to safety accidents such as fires.

[0003] In related technologies, air conditioners are installed within the string-type integrated cabin, and their operation is controlled by setting a target temperature value using the air conditioner's built-in temperature control panel. Alternatively, a battery management system is used to set a battery temperature threshold and output a switching signal to control the air conditioner's operation. However, both methods suffer from poor heat dissipation in the string-type integrated cabin. Summary of the Invention

[0004] This application provides a temperature control method and apparatus for a string-type integrated compartment, which can improve the heat dissipation effect of the string-type integrated compartment.

[0005] In a first aspect, embodiments of this application provide a temperature control method for a string-type integrated compartment, wherein the string-type integrated compartment contains multiple battery strings, and the temperature control method for the string-type integrated compartment includes:

[0006] Obtain the temperature values ​​of each battery string;

[0007] Cooling resources are allocated based on the temperature values ​​and temperature setpoints of each battery string in multiple battery strings, and the corresponding cooling resource allocation value for each battery string is determined.

[0008] For each battery string in multiple battery strings, the corresponding output power adjustment value of the battery string is determined based on the temperature value of the battery string and the average temperature value of the integrated string compartment.

[0009] Based on the cooling resource allocation value and the output power adjustment value, the temperature balance of the entire battery compartment is controlled. The temperature balance control includes controlling the cooling device corresponding to the battery string to output cooling resources according to the cooling resource allocation value, and adjusting the output power of the battery string according to the output power adjustment value.

[0010] In one possible implementation, cooling resources are allocated based on the temperature values ​​and temperature setpoints of each battery string in the plurality of battery strings, and the cooling resource allocation value corresponding to the battery string is determined, including:

[0011] A dynamic cooling resource allocation algorithm based on temperature sensitivity coefficient is used to determine the cooling demand index corresponding to the battery string based on the temperature setpoint and the temperature value.

[0012] The cooling resource allocation value corresponding to the battery string is determined based on the cooling demand index and the total cooling resources of the integrated string compartment.

[0013] In one possible implementation, the cooling demand index corresponding to the battery string is determined based on a preset temperature setpoint and a temperature value, including:

[0014] If the temperature value is lower than the temperature set value, the cooling demand index corresponding to the battery string is determined to be 0;

[0015] If the temperature value is greater than the temperature setpoint, the product of the difference between the temperature value and the temperature setpoint and the temperature sensitivity coefficient corresponding to the battery string is determined as the cooling demand index corresponding to the battery string. The temperature sensitivity coefficient indicates the degree of sensitivity of the battery string to the influence of temperature.

[0016] In one possible implementation, the cooling resource allocation value corresponding to the battery string is determined based on the cooling demand index and the total cooling resources of the integrated string compartment, including:

[0017] The sum of the cooling requirements of each battery string in the integrated string compartment is the total cooling requirement.

[0018] The ratio of cooling demand to total cooling demand is determined, and the product of this ratio and the total amount of cooling resources is used to determine the cooling resource allocation value for the battery string.

[0019] In one possible implementation, the cooling device is a liquid cooling device, and the cooling device corresponding to the battery string is controlled to output cooling resources according to the cooling resource allocation value, including:

[0020] The product of coolant density, coolant specific heat capacity, and the temperature difference between the inlet and outlet water of the liquid cooling device is determined as the flow conversion parameter;

[0021] Determine the ratio of the cooling resource allocation value to the flow conversion parameter, which is the coolant flow rate of the liquid cooling device corresponding to the battery string;

[0022] Based on the coolant flow rate, the corresponding liquid cooling device of the battery string is controlled to output cooling resources.

[0023] In one possible implementation, the output power adjustment value corresponding to the battery string is determined based on the temperature value of the battery string and the average temperature value of the integrated string compartment, including:

[0024] Based on the thermal equalization algorithm, the difference between the temperature value and the average temperature value is determined, and the product of this difference with the power regulation coefficient and the maximum power adjustment value is used to obtain the power adjustment value corresponding to the battery string.

[0025] In one possible implementation, it also includes:

[0026] Adjust the temperature setting based on the ambient temperature of the integrated tandem cabin at the current moment.

[0027] In one possible implementation, adjusting the temperature setpoint based on the ambient temperature of the tandem integrated cabin at the current moment includes:

[0028] The temperature adjustment value is determined based on the ambient temperature value and the average ambient temperature. The average ambient temperature is the average temperature of the environment in which the tandem integrated cabin is located within a preset time period.

[0029] Adjust the temperature setting value according to the temperature adjustment value.

[0030] In one possible implementation, it also includes:

[0031] The cooling power requirement is determined based on the heat generation power of each battery string, the ambient temperature of the integrated string compartment, and the temperature setpoint.

[0032] Based on the required cooling power, the cooling power of the corresponding cooling device in the integrated serial compartment is adjusted.

[0033] Secondly, embodiments of this application provide a temperature control device for a string-type integrated compartment, wherein multiple battery strings are disposed within the string-type integrated compartment, and the temperature control device for the string-type integrated compartment includes:

[0034] The acquisition module is used to acquire the temperature value of each battery string.

[0035] The first determining module is used to allocate cooling resources based on the temperature value and temperature set value of each battery string in multiple battery strings, and to determine the cooling resource allocation value corresponding to the battery string.

[0036] The second determining module is used to determine the output power adjustment value corresponding to each battery string in multiple battery strings based on the temperature value of the battery string and the average temperature value of the integrated string compartment.

[0037] The control module is used to perform overall temperature equalization control on the integrated battery cell based on the cooling resource allocation value and the output power adjustment value. The overall temperature equalization control includes controlling the cooling device corresponding to the battery cell to output cooling resources according to the cooling resource allocation value, and adjusting the output power of the battery cell according to the output power adjustment value.

[0038] Thirdly, embodiments of this application provide a temperature control device for a serial integrated cabin, including: a memory and a processor;

[0039] The memory stores instructions that the computer executes;

[0040] The processor executes computer execution instructions stored in memory, causing the processor to perform the methods described in the various possible implementations of the first aspect above.

[0041] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed, are used to implement the methods described in the various possible implementations of the first aspect above.

[0042] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed, implements the methods described in the various possible implementations of the first aspect above.

[0043] The temperature control method and apparatus for a string-type integrated compartment provided in this application acquires the temperature value of each battery string; allocates cooling resources based on the temperature value of each battery string and a temperature setpoint to determine the corresponding cooling resource allocation value for each battery string; for each battery string, determines the corresponding output power adjustment value based on the temperature value of the battery string and the average temperature value of the string-type integrated compartment; and performs overall temperature equalization control of the string-type integrated compartment based on the cooling resource allocation value and the output power adjustment value. This overall temperature equalization control includes controlling the output cooling resources of the cooling devices corresponding to the battery strings according to the cooling resource allocation value, and adjusting the output power of the battery strings according to the output power adjustment value. This application controls the temperature of the string-type integrated compartment from both the cooling resource supply and heat generation aspects by precisely adjusting the cooling resource allocation and dynamically adjusting the output power of the battery strings, thereby achieving temperature equalization within the string-type integrated compartment and improving its heat dissipation effect. Attached Figure Description

[0044] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0045] Figure 1 This is a schematic diagram of a serially integrated cabin structure provided in an embodiment of this application;

[0046] Figure 2 A schematic diagram of the temperature control method for a serial integrated cabin provided in an embodiment of this application;

[0047] Figure 3A schematic diagram of the temperature control device for the integrated serial compartment provided in this application;

[0048] Figure 4 A schematic diagram of the temperature control device for the integrated serial compartment provided in this application.

[0049] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0050] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0051] In related technologies, string-type integrated cabins typically use several air conditioners for temperature control. Target temperature values ​​are set using the air conditioners' built-in temperature control panels, or battery temperature thresholds are set through a battery management system, which then outputs switching signals to control the air conditioners' on / off operation. While this method can control the temperature within a certain range, it has significant drawbacks: large temperature fluctuations prevent precise control; excessively long operating times result in huge energy consumption; unreasonable allocation of cooling resources fails to address uneven heat generation between strings; and it lacks environmental adaptability, unable to dynamically adjust cooling strategies based on changes in the external environment.

[0052] Furthermore, some related infrastructures employ liquid cooling for heat dissipation in string-type integrated modules. In liquid-cooled string power conversion systems (PCS), uneven distribution of cooling resources can lead to hot spots, thus affecting the overall performance and reliability of the integrated module. Traditional liquid cooling systems use a fixed flow rate distribution method, which cannot dynamically adjust according to the actual heat generation status of the strings, resulting in low cooling efficiency and energy waste.

[0053] To address the aforementioned issues, this application proposes a temperature control method for string-type integrated cabins. Through dynamic power adjustment and dynamic allocation of cooling resources, it achieves precise temperature control and balanced management of the entire cabin, improving system safety and energy efficiency. By combining dynamic cooling resource allocation, dynamic power balancing, and environmentally adaptable temperature control strategies, it solves the problems of unreasonable cooling resource allocation and low temperature management efficiency, enabling precise temperature management and energy efficiency optimization of string-type integrated cabins under various operating conditions.

[0054] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0055] Figure 1 This is a schematic diagram of a string-type integrated module structure provided in an embodiment of this application. In one embodiment, the string-type integrated module includes four main parts: a string battery array, a cooling device, a sensor network, and a central controller. Figure 1 As shown, the string-type integrated module includes a string battery array with a modular design. Each battery string consists of multiple battery modules connected in series, and each battery module contains multiple cells. The strings are connected in parallel, allowing for independent power regulation and cooling control.

[0056] In one embodiment, the cooling device is a liquid-cooled unit with a cold plate design. The cooling plate is located at the bottom of the battery module and contacts the battery module through a thermally conductive material. The coolant is a 50% ethylene glycol aqueous solution with a density of 1073.35 kg / m³ (20°C) and a specific heat capacity of 3.281 kJ / (kg•K) (20°C). The liquid-cooled unit includes components such as a compressor, condenser, evaporator, pump, and liquid receiver, and can provide a maximum cooling power of 40 kW.

[0057] Optionally, the cooling device can also be an air-cooled device or other device that can output cooling resources under the control of a controller.

[0058] The sensor network includes temperature sensors, humidity sensors, flow sensors, pressure sensors, and air quality sensors. The temperature sensors are arranged in a distributed manner, with at least one temperature sensor on each battery module. Multiple sensors are arranged in key hot areas to form a sensor array, thereby improving temperature monitoring accuracy.

[0059] The central controller employs a high-performance embedded processor running a real-time operating system, enabling it to rapidly process sensor data and generate control commands. The central controller communicates with the Battery Management System (BMS) via a Controller Area Network (CAN) bus and with the cooling unit via the Modbus Transmission Control Protocol (Modbus TCP), achieving coordinated control between different parts of the system.

[0060] Table 1 shows the hardware composition and specifications of a serial integrated cabin provided in the embodiments of this application.

[0061] Table 1

[0062] Component type Specific components Technical Specifications quantity Battery System battery cells 314Ah 4992 Cooling system Liquid cooling unit Cooling power 40kW 1 unit Cooling system water pump Flow rate 360L / min 1 unit Sensing system Temperature sensor ±0.5℃ accuracy 64 control system Central controller Dual-core ARM Cortex-A72 1 unit

[0063] Figure 2 This is a schematic flowchart of a temperature control method for a serial integrated cabin provided in an embodiment of this application. Figure 2 As shown, the temperature control method for a serial integrated cabin provided in this application embodiment can be applied to, for example... Figure 1 The string-type integrated cabin shown includes the following temperature control methods:

[0064] S201. Take the temperature value of each battery string.

[0065] Specifically, the temperature value of the battery string can be the average of the temperature values ​​of the battery modules contained in the battery string.

[0066] S202. Based on the temperature value and temperature setpoint of each battery string in multiple battery strings, allocate cooling resources and determine the corresponding cooling resource allocation value for each battery string.

[0067] Specifically, a thermal balance equation and heat transfer model for the string-type integrated compartment are established to accurately describe its thermal dynamic characteristics. Based on the thermal balance equation and heat transfer model, as well as the temperature values ​​and temperature setpoints of each battery string, the cooling demand index corresponding to each battery string is determined. Based on the cooling demand index corresponding to each battery string and the total cooling resources of the string-type integrated compartment, the cooling resource allocation value corresponding to each battery string is determined.

[0068] In a real-time manner, the thermal dynamics of the battery string can be represented by the following differential equation:

[0069]

[0070] Where Ci is the heat capacity (J / ℃) of the i-th string. t is the temperature (°C) of the i-th battery string, and t is the time (s). It is the heat generation power (W) of the i-th string. It is the cooling power (W) of the i-th string. It is the convective heat transfer coefficient (W / m²·℃) of the i-th string. It is the heat exchange area (m²) of the i-th string. It is the ambient temperature (°C).

[0071] The relationship between the heat generation power and the charging / discharging power of a battery string can be expressed as:

[0072]

[0073] in, It is the current (A) of the i-th string. It is the internal resistance (Ω) of the i-th string. is the voltage (V) of the i-th string, and α is the electrothermal conversion coefficient, representing heating mechanisms other than ohmic heating.

[0074] The relationship between cooling power, coolant flow rate, and temperature difference can be expressed as:

[0075]

[0076] Where ρ is the density of the coolant (kg / m³). It is the specific heat capacity of the coolant (J / kg·℃). It is the coolant flow rate (m³ / s) of the i-th string. It is the coolant outlet temperature (°C) of the i-th string. It is the coolant inlet temperature (°C) of the i-th string.

[0077] S203. For each battery string in multiple battery strings, determine the corresponding output power adjustment value of the battery string based on the temperature value of the battery string and the average temperature value of the integrated string compartment.

[0078] It is understandable that battery strings continuously dissipate heat during operation, and the higher the output power of the battery string, the more heat it generates. Based on the thermal balance equation and heat transfer model, a thermal equalization algorithm is used to determine the corresponding output power adjustment value for each battery string based on its temperature and the average temperature of the integrated string compartment. By adjusting the charging and discharging power of each string, temperature balance among the battery strings is achieved.

[0079] S204. Based on the cooling resource allocation value and the output power adjustment value, perform overall temperature equalization control on the integrated battery compartment. Overall temperature equalization control includes controlling the cooling device corresponding to the battery string to output cooling resources according to the cooling resource allocation value, and adjusting the output power of the battery string according to the output power adjustment value.

[0080] For example, if the cooling device is a liquid cooling device, the coolant flow rate of the cooling device is controlled according to the cooling resource allocation value to control the output of cooling resources. In another example, if the cooling device is an air-cooled device, the airflow rate of the cooling device is controlled according to the cooling resource allocation value to control the output of cooling resources.

[0081] Based on the power adjustment value, the output power can be increased or decreased on the basis of the original output power of the battery string, so as to achieve temperature balance in the cabin while ensuring the energy storage performance of the integrated battery string.

[0082] The temperature control method for string integrated compartments provided in this application precisely adjusts the allocation of cooling resources and dynamically adjusts the output power of the battery strings. It controls the temperature of the string integrated compartment from both the supply of cooling resources and the generation of heat, thereby achieving a reasonable allocation of cooling resources and achieving temperature balance within the compartment while ensuring the energy storage performance of the string integrated compartment, thus improving the heat dissipation effect of the string integrated compartment.

[0083] In one possible implementation, cooling resources are allocated based on the temperature values ​​and temperature setpoints of each battery string in the plurality of battery strings, and the cooling resource allocation value corresponding to the battery string is determined, including:

[0084] A dynamic cooling resource allocation algorithm based on temperature sensitivity coefficient is used to determine the cooling demand index corresponding to the battery string based on the temperature setpoint and the temperature value.

[0085] The cooling resource allocation value corresponding to the battery string is determined based on the cooling demand index and the total cooling resources of the integrated string compartment.

[0086] Specifically, the cooling demand index is determined based on the difference between the current temperature of the battery string and the set temperature. When the current temperature of the battery string is lower than the set temperature, it indicates that the battery string is not overheating and does not require cooling, so the cooling demand index is 0. When the current temperature of the battery string is higher than the set temperature, and the larger the difference between the two, the more severe the overheating situation, and the higher the cooling demand index. Furthermore, the cooling demand index of the battery string must also fully consider the temperature sensitivity coefficient of the battery string, which represents the impact of temperature on the battery string. This ensures that the allocation of cooling resources can fully guarantee the energy storage performance of the battery string.

[0087] The temperature control method for a string-type integrated compartment provided in this application uses a dynamic cooling resource allocation algorithm based on a temperature sensitivity coefficient. It determines the cooling demand index corresponding to the battery string based on the temperature setpoint and the temperature value, and determines the cooling resource allocation value corresponding to the battery string based on the cooling demand index and the total cooling resources of the string-type integrated compartment. It can achieve precise allocation of cooling resources according to the heat dissipation requirements of the battery string.

[0088] In one possible implementation, the cooling demand index corresponding to the battery string is determined based on a preset temperature setpoint and a temperature value, including:

[0089] If the temperature value is lower than the temperature set value, the cooling demand index corresponding to the battery string is determined to be 0;

[0090] If the temperature value is greater than the temperature setpoint, the product of the difference between the temperature value and the temperature setpoint and the temperature sensitivity coefficient corresponding to the battery string is determined as the cooling demand index corresponding to the battery string. The temperature sensitivity coefficient indicates the degree of sensitivity of the battery string to the influence of temperature.

[0091] Specifically, the cooling demand index for the i-th battery string is:

[0092]

[0093] in, This represents the cooling demand index corresponding to the i-th battery string. Let be the temperature value of the i-th battery string. Set the temperature value. Let represent the temperature sensitivity of the i-th battery string.

[0094] The temperature control method for the string-type integrated compartment provided in this application accurately calculates a cooling demand index that fully reflects the cooling and heat dissipation needs of the battery string based on the temperature setpoint, the temperature value, and the temperature sensitivity coefficient of the battery string, providing a basis for the allocation of cooling resources in the string-type integrated compartment.

[0095] In one possible implementation, the cooling resource allocation value corresponding to the battery string is determined based on the cooling demand index and the total cooling resources of the integrated string compartment, including:

[0096] The sum of the cooling requirements of each battery string in the integrated string compartment is the total cooling requirement.

[0097] The ratio of cooling demand to total cooling demand is determined, and the product of this ratio and the total amount of cooling resources is used to determine the cooling resource allocation value for the battery string.

[0098] Specifically, the cooling resource allocation value can be calculated using the following formula:

[0099]

[0100] in, Assign a cooling resource value to the i-th battery string. For total cooling demand, For the cooling requirements of the i-th battery string, This refers to the total cooling resources of the string-type integrated compartment.

[0101] The temperature control method for a string-type integrated compartment provided in this application determines the cooling resource allocation value corresponding to the battery string based on the cooling demand index and the total cooling resources of the string-type integrated compartment, thereby achieving precise allocation of cooling resources and fully meeting the cooling and heat dissipation needs of each battery string.

[0102] In one possible implementation, the cooling device is a liquid cooling device, and the cooling device corresponding to the battery string is controlled to output cooling resources according to the cooling resource allocation value, including:

[0103] The product of coolant density, coolant specific heat capacity, and the temperature difference between the inlet and outlet water of the liquid cooling device is determined as the flow conversion parameter; the ratio of the cooling resource allocation value to the flow conversion parameter is determined as the coolant flow rate of the liquid cooling device corresponding to the battery string; based on the coolant flow rate, the output cooling resources of the liquid cooling device corresponding to the battery string are controlled.

[0104] Specifically, the coolant flow rate of the cooling device corresponding to the i-th battery string can be calculated in the following way:

[0105]

[0106] in, Let i be the coolant flow rate of the cooling device corresponding to the i-th battery string. ρ is the cooling resource allocation value corresponding to the i-th battery string, where ρ is the coolant density (kg / m³). It is the specific heat capacity of the coolant (J / kg·℃). This refers to the temperature difference between the inlet and outlet water of the liquid cooling device.

[0107] In one implementation, coolant flow distribution also needs to take into account pipeline pressure loss and pump capacity limitations, requiring an iterative optimization algorithm to find the optimal distribution scheme.

[0108] The temperature control method for the integrated battery string provided in this application embodiment accurately calculates the coolant flow rate of the liquid cooling device based on the cooling resource allocation value, and controls the cooling resource allocation of each battery string through the coolant flow rate, thereby achieving precise control of cooling resources.

[0109] In one possible implementation, the output power adjustment value corresponding to the battery string is determined based on the temperature value of the battery string and the average temperature value of the integrated string compartment, including:

[0110] Based on the thermal equalization algorithm, the difference between the temperature value and the average temperature value is determined, and the product of this difference with the power regulation coefficient and the maximum power adjustment value is used to obtain the power adjustment value corresponding to the battery string.

[0111] Specifically, the formula for calculating the power regulation value is as follows:

[0112]

[0113] in, It is the power adjustment value of the i-th string. The system average temperature is α, and the power regulation coefficient is α. This is the maximum allowable power adjustment value.

[0114] The actual power of each string after power adjustment is:

[0115]

[0116] in, This represents the output power of the i-th battery string before output power adjustment. This represents the output power of the i-th battery string after output power adjustment.

[0117] Power regulation needs to meet the system's total power demand constraint:

[0118]

[0119] in, This is the total power requirement of the system.

[0120] The temperature control method for the string-type integrated compartment provided in this application determines the difference between the temperature value and the average temperature value, multiplied by the power adjustment coefficient and the maximum power adjustment value, as the power adjustment value corresponding to the battery string, accurately adjusts the power output of the battery string, actively reduces the heat generation of the high-temperature battery string, and achieves temperature balance within the string-type integrated compartment.

[0121] In one possible implementation, it also includes:

[0122] Adjust the temperature setting based on the ambient temperature of the integrated tandem cabin at the current moment.

[0123] To achieve the dual goals of precise temperature control and energy-saving optimization, the temperature setpoint of the cooling device needs to be dynamically adjusted based on real-time ambient temperature data collected from the string integrated storage chamber. When the ambient temperature inside the chamber is detected to be higher than the preset threshold, the temperature setpoint of the cooling device is automatically lowered to enhance heat dissipation. When the ambient temperature is lower than the target operating range, the temperature setpoint is appropriately raised to reduce the operating load of the cooling device. Ultimately, through this closed-loop dynamic adjustment logic, the ambient temperature inside the string integrated storage chamber is stabilized within the optimal operating range of the equipment. This avoids problems such as thermal derating of power devices and battery capacity degradation caused by high temperatures, while also reducing unnecessary energy consumption in the cooling system, ensuring the long-term efficient and reliable operation of the energy storage system.

[0124] The temperature control method for the string integrated compartment provided in this application can accurately match the heat dissipation requirements inside the compartment, avoid unnecessary energy consumption caused by the long-term full-load operation of the cooling device, and significantly reduce the overall operating cost of the energy storage system. It can also effectively avoid problems such as performance degradation and shortened lifespan of the string integrated compartment due to excessively high temperature, or equipment condensation and start-up failures due to excessively low temperature. At the same time, the closed-loop dynamic temperature control logic can keep the environment inside the compartment stable within the optimal operating range of each electronic device, ensuring that the power generation efficiency and charging and discharging stability of the energy storage system are not affected by ambient temperature fluctuations. Ultimately, it takes into account the economic efficiency of system operation, the safety of equipment and the overall reliability of energy storage operation, and provides strong support for the long-term stable operation and maintenance of energy storage power stations.

[0125] In one possible implementation, adjusting the temperature setpoint based on the ambient temperature of the tandem integrated cabin at the current moment includes:

[0126] The temperature adjustment value is determined based on the ambient temperature value and the average ambient temperature. The average ambient temperature is the average temperature of the environment in which the tandem integrated cabin is located within a preset time period.

[0127] Adjust the temperature setting value according to the temperature adjustment value.

[0128] In one embodiment, based on weather data within a preset time period, the outdoor ambient temperature change is predicted, the average temperature of the environment in which the tandem integrated cabin is located within the preset time period is calculated, and the set temperature of the cooling device is dynamically compensated.

[0129] Specifically, the temperature adjustment value can be obtained using the following formula:

[0130]

[0131] in, This is the compensated set temperature. This is the original set temperature, and β is the compensation coefficient. This is the current ambient temperature. It is the average temperature.

[0132] The temperature control method for the string-type integrated cabin provided in this application compensates for the set temperature value based on the average temperature value within a preset time period and the current temperature value. While meeting the temperature control requirements of the string-type integrated cabin, it reduces system energy consumption and achieves energy saving and emission reduction.

[0133] In one possible implementation, it also includes:

[0134] The cooling power requirement is determined based on the heat generation power of each battery string, the ambient temperature of the integrated string compartment, and the temperature setpoint.

[0135] Based on the required cooling power, the cooling power of the corresponding cooling device in the integrated serial compartment is adjusted.

[0136] Specifically, the required cooling power can be determined using the following formula:

[0137]

[0138] in, U is the cooling power requirement, U is the heat transfer coefficient of the cabin (W / m²·℃), and A is the surface area of ​​the cabin (m²). This is the sum of the heat dissipation power of the battery pack strings. This refers to the ambient temperature value, which can be the current ambient temperature or a predicted temperature value within a preset time period. Set the temperature value.

[0139] The temperature control method for string integrated compartments provided in this application dynamically determines the cooling power of the cooling device based on the ambient temperature, the heat generation power of the battery string, and the temperature setpoint. This enables the cooling resources generated by the cooling device to accurately meet the cooling needs of the string integrated compartment, thus avoiding energy waste.

[0140] The following specific embodiment illustrates the implementation method and application of the calculation formula of the temperature control method for the integrated serial cabin provided in this application.

[0141] Assume a 20-foot high cube container energy storage system containing 12 battery clusters, each cluster having 4 battery modules, and each module consisting of 104 314 cells connected in series. The total system capacity is 5MWh, and the average heat generated by the cells during 0.5C charge / discharge is 12.5W.

[0142] First, temperature data from each string is collected using a sensor network. Assuming the system has 12 strings, the collected temperature data is shown in Table 2 below:

[0143] Table 2

[0144] Cluster number Temperature (°C) Temperature rise rate (°C / min) Temperature standard deviation (°C) 1 35.2 0.12 1.2 2 38.5 0.21 1.8 3 33.8 0.08 0.9 4 36.4 0.15 1.5 5 39.2 0.25 2.1 6 34.6 0.10 1.1 7 37.8 0.18 1.6 8 32.5 0.05 0.7 9 36 0.14 1.4 10 35.5 0.11 1.3 11 37.2 0.17 1.5 12 34.2 0.09 1.0

[0145] Calculate the string temperature state matrix, including the string average temperature, string temperature standard deviation, string temperature rise rate, and string heat capacity coefficient. The formula for calculating the string average temperature is:

[0146]

[0147] The formula for calculating the standard deviation of string temperature is:

[0148]

[0149] Based on the temperature data, calculate the cooling demand index for each string. Assume a set temperature... =25℃, temperature sensitivity coefficient If the value is 1 (the same for all battery strings), then the cooling demand index for battery string 1 is:

[0150]

[0151] Similarly, calculate the cooling demand index for other strings, and then calculate the total cooling demand index:

[0152]

[0153] Total system cooling capacity =40kW (determined based on the capacity of the liquid cooler unit). The cooling capacity allocated to battery pack string 1 is:

[0154]

[0155] Similarly, the cooling capacity allocated to other strings can be calculated.

[0156] Calculate the average temperature of the system =36.0℃, assuming power regulation coefficient α=0.05, the maximum allowable power regulation value. =10kW. The power adjustment value for battery pack string 1 (temperature below average temperature) is:

[0157]

[0158] The power adjustment value for string 2 (temperature above average) is:

[0159]

[0160] A positive adjustment value indicates an increase in power output, while a negative adjustment value indicates a decrease in power output. Through this power regulation, strings with lower temperatures increase their power output, while strings with higher temperatures decrease their power output, thereby achieving temperature balance among the strings.

[0161] Assuming ambient temperature =32℃, average ambient temperature =25℃, compensation coefficient β=0.5, original set temperature =25℃. Therefore, the compensated set temperature is:

[0162]

[0163] The liquid cooling unit adjusts its operating parameters according to the compensated set temperature. Increasing the set temperature can reduce cooling energy consumption and adapt to high-temperature environmental conditions.

[0164] Figure 3A schematic diagram of the temperature control device for the integrated serial compartment provided in this application is shown below. Figure 3 As shown, the string-type integrated compartment contains multiple battery strings. The temperature control device 30 for the string-type integrated compartment provided in this embodiment includes:

[0165] The acquisition module 301 is used to acquire the temperature value of each battery string;

[0166] The first determining module 302 is used to allocate cooling resources based on the temperature value and temperature set value of each battery string in the multiple battery strings, and to determine the cooling resource allocation value corresponding to the battery string.

[0167] The second determining module 303 is used to determine the output power adjustment value corresponding to each battery string in multiple battery strings based on the temperature value of the battery string and the average temperature value of the integrated battery compartment.

[0168] The control module 304 is used to perform overall temperature equalization control on the integrated battery compartment based on the cooling resource allocation value and the output power adjustment value. The overall temperature equalization control includes controlling the cooling device corresponding to the battery string to output cooling resources according to the cooling resource allocation value, and adjusting the output power of the battery string according to the output power adjustment value.

[0169] In one possible implementation, the first determining module 302 is specifically used for:

[0170] A dynamic cooling resource allocation algorithm based on temperature sensitivity coefficient is used to determine the cooling demand index corresponding to the battery string based on the temperature setpoint and the temperature value.

[0171] The cooling resource allocation value corresponding to the battery string is determined based on the cooling demand index and the total cooling resources of the integrated string compartment.

[0172] In one possible implementation, the first determining module 302 is specifically used for:

[0173] If the temperature value is lower than the temperature set value, the cooling demand index corresponding to the battery string is determined to be 0;

[0174] If the temperature value is greater than the temperature setpoint, the product of the difference between the temperature value and the temperature setpoint and the temperature sensitivity coefficient corresponding to the battery string is determined as the cooling demand index corresponding to the battery string. The temperature sensitivity coefficient indicates the degree of sensitivity of the battery string to the influence of temperature.

[0175] In one possible implementation, the first determining module 302 is specifically used for:

[0176] The sum of the cooling requirements of each battery string in the integrated string compartment is the total cooling requirement.

[0177] The ratio of cooling demand to total cooling demand is determined, and the product of this ratio and the total amount of cooling resources is used to determine the cooling resource allocation value for the battery string.

[0178] In one possible implementation, the cooling device is a liquid cooling device, and the control module 304 is specifically used for:

[0179] The product of coolant density, coolant specific heat capacity, and the temperature difference between the inlet and outlet water of the liquid cooling device is determined as the flow conversion parameter;

[0180] Determine the ratio of the cooling resource allocation value to the flow conversion parameter, which is the coolant flow rate of the liquid cooling device corresponding to the battery string;

[0181] Based on the coolant flow rate, the corresponding liquid cooling device of the battery string is controlled to output cooling resources.

[0182] In one possible implementation, the second determining module 303 is specifically used for:

[0183] Based on the thermal equalization algorithm, the difference between the temperature value and the average temperature value is determined, and the product of this difference with the power regulation coefficient and the maximum power adjustment value is used to obtain the power adjustment value corresponding to the battery string.

[0184] In one possible implementation, the control module 304 is further configured to:

[0185] Adjust the temperature setting based on the ambient temperature of the integrated tandem cabin at the current moment.

[0186] In one possible implementation, the control module 304 is further configured to:

[0187] The temperature adjustment value is determined based on the ambient temperature value and the average ambient temperature. The average ambient temperature is the average temperature of the environment in which the tandem integrated cabin is located within a preset time period.

[0188] Adjust the temperature setting value according to the temperature adjustment value.

[0189] In one possible implementation, the control module 304 is further configured to:

[0190] The cooling power requirement is determined based on the heat generation power of each battery string, the ambient temperature of the integrated string compartment, and the temperature setpoint.

[0191] Based on the required cooling power, the cooling power of the corresponding cooling device in the integrated serial compartment is adjusted.

[0192] The temperature control device for the integrated compartment in this embodiment can execute the method provided in the above-described method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0193] Figure 4This is a structural schematic diagram of the temperature control device for the serial integrated compartment provided in this application. Figure 4 As shown, the string-type integrated cabin temperature control device 40 provided in this embodiment includes at least one processor 401 and a memory 402. Optionally, the string-type integrated cabin temperature control device 40 further includes a communication interface 403. The processor 401, memory 402, and communication interface 403 are connected via a communication bus 404.

[0194] In a specific implementation, at least one processor 401 executes computer execution instructions stored in memory 402, causing at least one processor 401 to perform the above-described method.

[0195] The specific implementation process of processor 401 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0196] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0197] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0198] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0199] This application also provides a computer program product, including a computer program that, when executed, implements the above-described method.

[0200] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed, implement the above-described method.

[0201] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0202] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an application-specific integrated circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0203] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0204] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0205] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0206] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0207] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0208] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A temperature control method for a serial integrated cabin, characterized in that, The integrated string compartment contains multiple battery strings, and the temperature control method for the integrated string compartment includes: Obtain the temperature value of each of the battery strings; Cooling resources are allocated based on the temperature value and temperature setpoint of each battery string in the plurality of battery strings, and the cooling resource allocation value corresponding to the battery string is determined. For each of the multiple battery strings, the output power adjustment value corresponding to the battery string is determined based on the temperature value of the battery string and the average temperature value of the integrated string compartment. Based on the cooling resource allocation value and the output power adjustment value, the overall temperature balance control of the string-type integrated compartment is performed. The overall temperature balance control includes controlling the cooling device corresponding to the battery string to output cooling resources according to the cooling resource allocation value, and adjusting the output power of the battery string according to the output power adjustment value.

2. The temperature control method for the serial integrated cabin according to claim 1, characterized in that, The step of allocating cooling resources based on the temperature value and temperature setpoint of each battery string in the plurality of battery strings, and determining the cooling resource allocation value corresponding to each battery string, includes: A cooling resource dynamic allocation algorithm based on temperature sensitivity coefficient is used to determine the cooling demand index corresponding to the battery string according to the temperature setpoint and the temperature value. The cooling resource allocation value corresponding to the battery string is determined based on the cooling demand index and the total cooling resources of the integrated string compartment.

3. The temperature control method for the serial integrated cabin according to claim 2, characterized in that, The step of determining the cooling demand index corresponding to the battery string based on the preset temperature setting value and the temperature value includes: If the temperature value is less than the temperature set value, the cooling demand index corresponding to the battery string is determined to be 0; If the temperature value is greater than the temperature setpoint, the product of the difference between the temperature value and the temperature setpoint and the temperature sensitivity coefficient corresponding to the battery string is determined as the cooling demand index corresponding to the battery string. The temperature sensitivity coefficient represents the degree of sensitivity of the battery string to the influence of temperature.

4. The temperature control method for the serial integrated cabin according to claim 2, characterized in that, Based on the cooling demand index and the total cooling resources of the integrated string compartment, the cooling resource allocation value corresponding to the battery string is determined, including: The sum of the cooling requirements of each battery string in the integrated string compartment is determined as the total cooling requirement; The product of the ratio of the cooling demand to the total cooling demand and the total cooling resources is determined as the cooling resource allocation value corresponding to the battery string.

5. The temperature control method for a serial integrated cabin according to any one of claims 1 to 4, characterized in that, The cooling device is a liquid cooling device, and the step of controlling the cooling device corresponding to the battery string to output cooling resources according to the cooling resource allocation value includes: The product of coolant density, coolant specific heat capacity, and the temperature difference between the inlet and outlet water of the liquid cooling device is determined as the flow conversion parameter; The ratio of the cooling resource allocation value to the flow conversion parameter is determined to be the coolant flow rate of the liquid cooling device corresponding to the battery string; Based on the coolant flow rate, the liquid cooling device corresponding to the battery string is controlled to output cooling resources.

6. The temperature control method for a serial integrated cabin according to any one of claims 1 to 4, characterized in that, The step of determining the output power adjustment value corresponding to the battery string based on the temperature value of the battery string and the average temperature value of the integrated string compartment includes: Based on the thermal equalization algorithm, the difference between the temperature value and the average temperature value is determined, and the product of this difference with the power adjustment coefficient and the maximum power adjustment value is the power adjustment value corresponding to the battery string.

7. The temperature control method for a serial integrated cabin according to any one of claims 1 to 4, characterized in that, Also includes: The temperature setting value is adjusted based on the ambient temperature value of the integrated tandem cabin at the current moment.

8. The temperature control method for a serial integrated cabin according to claim 7, characterized in that, The step of adjusting the temperature setpoint based on the ambient temperature of the integrated tandem cabin at the current moment includes: A temperature adjustment value is determined based on the ambient temperature value and the average ambient temperature, wherein the average ambient temperature is the average temperature of the environment in which the tandem integrated cabin is located within a preset time period. Adjust the temperature setting value according to the temperature adjustment value.

9. The temperature control method for a serial integrated cabin according to any one of claims 1 to 4, characterized in that, Also includes: The cooling power requirement is determined based on the heat generation power corresponding to the multiple battery strings, the ambient temperature of the integrated battery compartment, and the temperature setpoint. Based on the required cooling power, the cooling device corresponding to the string-type integrated compartment is controlled to adjust its cooling power.

10. A temperature control device for a serial integrated compartment, characterized in that, The integrated string compartment contains multiple battery strings, and the temperature control device for the integrated string compartment includes: The acquisition module is used to acquire the temperature value of each of the battery strings; The first determining module is used to allocate cooling resources based on the temperature value and temperature set value of each battery string in the plurality of battery strings, and to determine the cooling resource allocation value corresponding to the battery string. The second determining module is used to determine the output power adjustment value corresponding to each battery string in the plurality of battery strings based on the temperature value of the battery string and the average temperature value of the integrated string compartment. The control module is used to perform overall temperature equalization control on the integrated battery string according to the cooling resource allocation value and the output power adjustment value. The overall temperature equalization control includes controlling the cooling device corresponding to the battery string to output cooling resources according to the cooling resource allocation value, and adjusting the output power of the battery string according to the output power adjustment value.

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